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RFC 4293 - Management Information Base for the Internet Protocol


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Network Working Group                                   S. Routhier, Ed.
Request for Comments: 4293                                    April 2006
Obsoletes: 2011, 2465, 2466
Category: Standards Track

                      Management Information Base
                     for the Internet Protocol (IP)

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2006).

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes managed objects used for implementations
   of the Internet Protocol (IP) in an IP version independent manner.
   This memo obsoletes RFCs 2011, 2465, and 2466.

Table of Contents

   1. The Internet-Standard Management Framework ......................2
   2. Revision History ................................................3
   3. Overview ........................................................3
      3.1. Multi-Stack Implementations ................................3
      3.2. Discussion of Tables and Groups ............................3
           3.2.1. General Objects .....................................4
           3.2.2. Interface Tables ....................................4
           3.2.3. IP Statistics Tables ................................4
           3.2.4. Internet Address Prefix Table .......................8
           3.2.5. Internet Address Table ..............................8
           3.2.6. Internet Address Translation Table ..................9
           3.2.7. IPv6 Scope Zone Index Table .........................9
           3.2.8. Default Router Table ................................9
           3.2.9. Router Advertisement Table ..........................9
           3.2.10. ICMP Statistics Tables .............................9
           3.2.11. Conformance and Compliance ........................10
           3.2.12. Deprecated Objects ................................10
   4. Updating Implementations .......................................10
      4.1. Updating an Implementation of the IPv4-only IP-MIB ........11
      4.2. Updating an Implementation of the IPv6-MIB ................12
   5. Definitions ....................................................13
   6. Previous Work .................................................116
   7. References ....................................................116
      7.1. Normative References .....................................116
      7.2. Informative References ...................................117
   8. Security Considerations .......................................118
   9. Acknowledgements ..............................................120
   10. Authors ......................................................120

1.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC 3410 [9].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,
   RFC 2578 [1], STD 58, RFC 2579 [2] and STD 58, RFC 2580 [3].

2.  Revision History

   One of the primary purposes of this revision of the IP MIB is to
   create a single set of objects to describe and manage IP modules in
   an IP version independent manner.  Where RFCs 2465 and 2466 created a
   set of objects independent from RFC 2011, this document merges those
   three documents into a single unified set of objects.  The
   ipSystemStatsTable and ipIfStatsTable tables are examples of updating
   objects to be independent of IP version.  Both of these tables
   contain counters to reflect IP traffic statistics that originated in
   much earlier MIBs and both include an IP address type in order to
   separate the information based on IP version.

   Another purpose of this document is to increase the manageability of
   a node running IPv6 by adding new objects.  Some of these tables,
   such as ipDefaultRouterTable, may be useful on both IPv4 and IPv6
   nodes while others, such as ipv6RouterAdvertTable, are specific to a
   single protocol.

3.  Overview

3.1.  Multi-Stack Implementations

   This MIB does not provide native support for implementations of
   multiple stacks sharing the same address type.  One option for
   supporting such designs is to assign each stack within an address
   type to a separate context.  These contexts could then be selected
   based upon the context name, with the Entity MIB and View-based
   Access Control Model (VACM) Context Table providing methods for
   listing the supported contexts.

3.2.  Discussion of Tables and Groups

   This MIB is composed of a small number of discrete objects and a
   series of tables meant to form the base for managing IPv4 and IPv6
   entities.

   While some of the objects are meant to be included in all entities,
   some of the objects are only conditionally mandatory.  The
   unconditionally mandatory objects are mostly counters for IP and ICMP
   statistics.  The conditionally mandatory objects fall into one of
   several groups: objects for use in higher bandwidth situations,
   objects for use with IPv4, objects for use with IPv6, and objects for
   use on IPv6 routers.  In short, it is not expected that every entity
   will implement all of the objects within this MIB.  The reader should
   consult the conformance and compliance section to determine which
   objects are appropriate for a given entity.

3.2.1.  General Objects

   In both IPv4 and IPv6, there are only a small number of "knobs" for
   controlling the general IP stack.  Most controls will be in a more
   specific setting, such as for controlling a router or TCP engine.

   This MIB defines a total of three general knobs, only two of which
   are used for both IPv4 and IPv6.

   Objects are included for both protocols to enable or disable
   forwarding and to set limits on the lifetime of a packet (ttl or hop
   count).

   The third knob, the timeout period for reassembling fragments, is
   only defined for IPv4, as IPv6 specifies this value directly.

   Each group of objects is required when implementing their respective
   protocols.

3.2.2.  Interface Tables

   This MIB includes a pair of tables to convey information about the
   IPv4 and IPv6 protocols that is interface specific.

   Special note should be taken of the administrative status objects.
   These are defined to allow each protocol to selectively enable or
   disable interfaces.  These objects can be used in conjunction with
   the ifAdminStatus object to manipulate the interfaces as necessary.
   With these three objects, an interface may be enabled or disabled
   completely, as well as connected to the IPv4 stack, the IPv6 stack or
   both stacks.  Setting ifAdminStatus to "down" should not affect the
   protocol specific status objects.

   Each interface table is required when implementing their respective
   protocols.

3.2.3.  IP Statistics Tables

   The IP statistics tables (ipSystemStatsTable and ipIfStatsTable)
   contain objects to count the number of datagrams and octets that a
   given entity has processed.  Unlike the previous attempt, this
   document uses a single table for multiple address types.  Typically
   the only two types of interest are IPv4 and IPv6; however, the table
   can support other types if necessary.

   The first table, ipSystemStatsTable, conveys system wide information.
   (That is, the various counters are for all interfaces and not a
   specific set of interfaces.)  Its index is formed from a single

   sub-id that represents the address type for which the statistics were
   counted.

   The second table, ipIfStatsTable, conveys interface specific
   information.  Its index is formed from two sub-ids.  The first
   represents the address type (IPv4 and IPv6), and the interface within
   that address type is represented by the second sub-id.

   The two tables have a similar set of objects that are intended to
   count the same things, except for the difference in granularity.  The
   object ID "ipSystemStatsEntry.2" is reserved in order to align the
   object IDs of the counters in the first table with their counterparts
   in the second table.

   Several objects to note are ipSystemStatsDiscontinuityTime,
   ipIfStatsDiscontinuityTime, ipSystemsStatsRefreshRate, and
   ipIfStatsRefreshRate.  These objects provide information about the
   row in the table more than about the system itself.

   The discontinuity objects allow a management entity to determine if a
   discontinuity event that would invalidate the management entity's
   understanding of the counters has occurred.  The system being re-
   initialized or the interface being cycled are possible examples of a
   discontinuity event.

   The refresh objects allow a management entity to determine a proper
   polling interval for the rest of the objects.

   The following Case diagram represents the general ordering of the
   packet counters.  In order to avoid extra clutter, the prefixes
   "ipSystemStats" and "ipIfStats" have been removed from each of the
   counter names.

 from                                            from
 interface                                       upper
                                                 layers

  V                                               V
  |                                               |
  + InReceives (1)                                + OutRequests
  |                                               |
  |                                               |
  +--> InHdrErrors (5)                            +--> OutNoRoutes
  |                                               |
  |                                               |
  +->-+ InMcastPkts (1)                           |
  |   V                                           |
  +-<-+                                           |
  |                                               |
  +->-+ InBcastPkts (1)                           |
  |   V                                           |
  +-<-+                                           |
  |                                               |
  |                                               |
  +--> InTruncatedPkts (5)                        |
  |                                               |
  |                                               |
  +--> InAddrErrors                               |
  |                                               |
  |                                               |
  +--> InDiscards (2)                             |
  |                                               |
  |                                               |

  +--------+------->------+----->-----+----->-----+
  |  InForwDatagrams (6)  |   OutForwDatagrams (6)|
  |                       V                       +->-+ OutFragReqds
  |                   InNoRoutes                  |   | (packets)
  / (local packet (3)                             |   |
  |  IF is that of the address                    |   +--> OutFragFails
  |  and may not be the receiving IF)             |   |    (packets)
  |                                               |   |
  |                                               |   V OutFragOks
  |                                               |   | (packets) (7)
  |                                               |   |
  +->-+ ReasmReqds (fragments)                    +-<-+ OutFragCreates
  |   |                                           |       (fragments)
  |   |                                           |
  |   +--> ReasmFails (fragments (4))             +->-+ OutMcastPkts (1)
  |   |                                           |   V
  |   |                                           +-<-+
  +-<-+ ReasmOKs (reassembled packets)            |
  |                                               +->-+ OutBcastPkts (1)
  |                                               |   V
  +--> InUnknownProtos                            +-<-+
  |                                               |
  |                                               |
  +--> InDiscards (2)                             +--> OutDiscards (2)
  |                                               |
  |                                               |
  + InDelivers                                    + OutTransmits (1)
  |                                               |
  V                                               V
 to                                              to
 upper                                           interface
 layers

   (1) The HC counters and octet counters are also found at these points
       but have been left out for clarity.

   (2) The discard counters may increment at any time in the processing
       path.  Packets discarded to the left of InNoRoutes cause the
       InDiscards counter to increment, while those discarded to the
       right are counted in the OutDiscards counters.

   (3) Local packets on the input side are counted on the interface
       associated with their destination address, which may not be the
       interface on which they were received.  This requirement is
       caused by the possibility of losing the original interface during
       processing, especially re-assembly.

   (4) Some re-assembly algorithms may lose track of the number of
       fragments during processing and so some fragments may not be
       counted in this object.

   (5) InTruncatedPkts should only be incremented if the frame contained
       a valid header but was otherwise shorter than required.  Frames
       that are too short to contain a valid header should be counted as
       InHdrErrors.

   (6) The forwarding objects may be incremented, even for packets that
       originated locally or are destined for the local host, if their
       addresses are such that the local host would need to forward the
       packet to pass it to the correct interface.

   (7) When fragmenting a packet, an entity should increment the
       OutFragFails counter, rather than the OutDiscards counter, in
       order to preserve the equation FragOks + FragFails == FragRqds.

   The objects in both tables are spread amongst several conformance
   groups based on the bandwidth required to wrap the counters within an
   hour.  The base system group is mandatory for all entities.  The
   other system groups are optional depending on bandwidth.  The
   interface specific-groups are optional.

3.2.4.  Internet Address Prefix Table

   This table provides information about the prefixes this entity is
   using, including their lifetimes.  This table provides a convenient
   place to which other tables that make use of prefixes, such as the
   ipAddressTable, may point.  By including this table, the MIB can
   supply the prefix information for all addresses, yet minimize the
   amount of duplication required in storing and accessing this data.
   This arrangement also clarifies the relationship between addresses
   that have the same prefix.

   This table is required for IPv6 entities.

3.2.5.  Internet Address Table

   This table lists the IP addresses (both IPv4 and IPv6) used by this
   entity.  It also includes some basic information about how and when
   the address was formed and last updated.  This table allows a manager
   to determine who a given entity thinks it is.

   This table is required for all IP entities.

3.2.6.  Internet Address Translation Table

   This table provides a mapping between IP layer addresses and physical
   addresses as would be formed by either Address Resolution Protocol
   (ARP) for IPv4 or the neighbor discovery protocol for IPv6.

3.2.7.  IPv6 Scope Zone Index Table

   This table specifies the zone index to interface mapping.  By
   examining the table, a manager can determine which groups of
   interfaces are within a particular zone for a given scope.

   The zone index information is only valid within a given entity; the
   indexes used on one entity may not be comparable to those used on a
   different entity.

   This table is required for IPv6 entities.

3.2.8.  Default Router Table

   This table lists the default routers known to this entity.  This
   table is intended to be a simple list to display the information that
   end nodes may have been configured with or acquired through a simple
   system such as IPv6 router advertisements.  Managers attempting to
   view more complicated routing information should examine the routing
   specific tables from other MIBs.

   This table is required for all entities.

3.2.9.  Router Advertisement Table

   This table contains the non-routing information that an IPv6 router
   would use in constructing a router advertisement message.  It does
   not contain information about the prefixes or other routing specific
   information that the router might advertise.  The router should
   acquire such information from either the routing tables or from some
   routing table specific MIB.

   This table is only required for IPv6 router entities.

3.2.10.  ICMP Statistics Tables

   There are two sets of statistics for ICMP.  The first contains a
   simple set of counters to track the number of ICMP messages and
   errors processed by this entity.

   The second supplies more detail about the ICMP messages processed by
   this entity.  Its index is formed from two sub-ids.  The first
   represents the address type (IPv4 and IPv6), and the second
   represents the particular message type being counted.  A given row
   need not be instantiated unless a message of that type has been
   processed, i.e., the row for icmpMsgStatsType=X MAY be instantiated
   before but MUST be instantated after the first message with Type=X is
   received or transmitted.  After receiving or transmitting any
   succeeding messages with Type=X, the relevant counter must be
   incremented.

   Both of these tables are required for all entities.

3.2.11.  Conformance and Compliance

   This MIB contains several sets of objects.  Some of these sets are
   useful on all types of entities, while others are only useful on a
   limited subset of entities.  The conformance section attempts to
   group the objects into sets that may be discussed as units, and the
   compliance section then details which of these units are required in
   various circumstances.

   The circumstances used in the compliance section are implementing
   IPv4, IPv6, or IPv6 router functions and having a bandwidth of less
   than 20MB, between 20MB and 650MB, or greater than 650MB.

3.2.12.  Deprecated Objects

   This MIB also includes a set of deprecated objects from previous
   iterations.  They are included as part of the historical record.

4.  Updating Implementations

   There are several general classes of change that are required.

   The first and most major change is that most of the previous objects
   have different object IDs and additional indexes to support the
   possibility of different address types.  The general counters for IP
   and ICMP are examples of this.  They have been moved to the
   ipSystemStatsTable and icmpMsgStatsTable, respectively.

   The second change is the extension of all address objects to allow
   for both IPv4 and IPv6 addresses and the addition of an address type
   object to specify what address type is in use.

   The third change is the addition of several new objects to the
   replacement for a previously existing table such as ipNetToPhysical.

   The fourth change is the addition of completely new tables such as
   ipIfStatsTable and ipDefaultRouterTable.  The first is based on the
   previous statistics groups, while the second is completely new to
   this MIB.

4.1.  Updating an Implementation of the IPv4-only IP-MIB

   The somewhat more specific changes that are required for IPv4 follow.
   Note well:  this is not meant to be an exhaustive list and the reader
   should examine the MIB for full details.

   Several of the general objects (ipForwarding, ipDefaultTTL,
   ipReasmTimeout) remain unchanged.

   Most of the rest of the general objects were counters and have been
   moved into the ipSystemStatsTable.  The basic instrumentation should
   remain the same, though the object definitions should be checked for
   clarifications.  If they aren't already in a structure, putting the
   counter variables in one would be useful.  Several new objects have
   been added to count additional items, and instrumentation code must
   be added for these objects.  Finally, the SNMP routines must be
   updated to handle the new indexing.

   In addition to the ipSystemStatsTable, the MIB includes the
   ipIfStatsTable.  This table counts the same items as the system table
   but does so on a per interface basis.  It is optional and may be
   ignored.  If you decide to implement it, you may wish to arrange to
   collect the data on a per-interface basis and then sum those counters
   in order to provide the aggregate system level statistics.  However,
   if you choose to provide the system level statistics by summing the
   interface level counters, no interface level statistics can be lost -
   if an interface is removed, the statistics associated with it must be
   retained.

   The ipAddrTable has, loosely, been converted to the ipAddressTable.
   While the general idea remains the same, the ipAddressTable is
   sufficiently different that writing new code may be easier than
   updating old code.  The primary difference is the addition of several
   new objects.  In addition, the ipAdEntReasmMaxSize has been moved to
   another table, ipv4InterfaceTable.  As above, the SNMP routines will
   need to be updated to handle the new indexing.

   The ipNetToMediaTable has been moved to the ipNetToPhysicalTable.
   These tables are fairly similar and updating the old code may be
   straightforward.  As above, the SNMP routines will need to be updated
   to handle the new indexing.

   Two new tables, ipv4InterfaceTable and ipDefaultRouterTable, are
   required as well as several new ICMP counters.

   Finally, there are several tables that are required for IPv6 but are
   optional for IPv4 that you may elect to implement.

4.2.  Updating an Implementation of the IPv6-MIB

   The somewhat more specific changes that are required for IPv6 follow.
   Note well:  this is not meant to be an exhaustive list and the reader
   should examine the MIB for full details.

   Two of the general objects, ipv6Forwarding and ipv6DefaultHopLimit,
   have been renamed and given new object identifiers within the ip
   branch but are otherwise unchanged.  The new names are
   ipv6IpForwarding and ipv6IpDefaultHopLimit.

   While there is an ipv6InterfaceTable that contains some of the pieces
   from the ipv6IfTable, the two are somewhat different in concept.  The
   ipv6IfTable was meant to replicate the ifTable while the
   ipv6InterfaceTable is meant to be an addition to the ifTable.  As
   such, items that were duplicated between the ifTable and ipv6IfTable
   have been removed and some new objects added.

   The ipv6IfStatsTable most closely resembles the ipIfStatsTable with
   an additional index for the address type and most of the
   instrumentation should be re-usable.  Some new objects have been
   added to the ipIfStatsTable.  As above, the SNMP routines will need
   to be updated to handle the new indexing.  Finally, the
   ipIfStatsTable is optional and may be ignored.

   The ipSystemStatsTable is effectively new, but it may be able to make
   use of most of the instrumentation from the old ipv6IfStatsTable.  As
   with the IPv4 discussion, one implementation strategy would be to
   count the statistics for the ipIfStatsTable and aggregate them when
   queried for this table.  Again, as with the IPv4 discussion, this
   strategy only works if the interfaces cannot be removed or if the
   statistics for removed interfaces are somehow retained.

   The ipv6AddrPrefixTable is now the ipAddressPrefixTable.  The new
   table contains an extra object and the additional index required for
   IPv4 compatibility.  As above, the SNMP routines will need to be
   updated to handle the new indexing.

   The ipAddressTable is loosely based on the ipv6AddrTable but has
   changed considerably with the addition of several new objects and the
   removal of one of its indexes.

   The IPv6 routing information (ipv6RouteNumber, ipv6DiscardedRoutes,
   and ipv6RouteTable) has been removed from this MIB.  The replacements
   or updates for this information is in the update to the IP Forwarding
   Table MIB [16].  The ipv6NetToMediaTable has been converted to the
   ipNetToPhysicalTable.  The new table contains an extra object and the
   additional index required for IPv4 compatibility.  As above, the SNMP
   routines will need to be updated to handle the new indexing.

   The ICMP tables have been substantially changed.  The previous tables
   required counting on a per-message and per-interface basis.  The new
   tables only require counting on a per-message, per-protocol basis and
   include an aggregate of all messages on a per-protocol basis.

   In addition to the above, several new tables have been added.  Both
   the ipv6ScopeZoneIndexTable and ipDefaultRouterTable are required on
   all IPv6 entities.  The ipv6RouterAdvertTable is only required on
   IPv6 routers.

5.  Definitions

   The following MIB module imports from the IF-MIB [6] and the INET-
   ADDRESS-MIB [7] and references Neighbor Discovery [4], the IPv6
   Stateless Address Autoconfiguration protocol [5], the Default Router
   Preferences document [8], ARP [10] and the IPv6 address architecture
   document [17].

IP-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE,
    Integer32, Counter32, IpAddress,
    mib-2, Unsigned32, Counter64,
    zeroDotZero                        FROM SNMPv2-SMI
    PhysAddress, TruthValue,
    TimeStamp, RowPointer,
    TEXTUAL-CONVENTION, TestAndIncr,
    RowStatus, StorageType             FROM SNMPv2-TC
    MODULE-COMPLIANCE, OBJECT-GROUP    FROM SNMPv2-CONF
    InetAddress, InetAddressType,
    InetAddressPrefixLength,
    InetVersion, InetZoneIndex         FROM INET-ADDRESS-MIB
    InterfaceIndex                     FROM IF-MIB;

ipMIB MODULE-IDENTITY
    LAST-UPDATED "200602020000Z"
    ORGANIZATION "IETF IPv6 MIB Revision Team"
    CONTACT-INFO
           "Editor:

            Shawn A. Routhier
            Interworking Labs
            108 Whispering Pines Dr. Suite 235
            Scotts Valley, CA 95066
            USA
            EMail: <sar@iwl.com>"
    DESCRIPTION
           "The MIB module for managing IP and ICMP implementations, but
            excluding their management of IP routes.

            Copyright (C) The Internet Society (2006).  This version of
            this MIB module is part of RFC 4293; see the RFC itself for
            full legal notices."

    REVISION      "200602020000Z"
    DESCRIPTION
           "The IP version neutral revision with added IPv6 objects for
            ND, default routers, and router advertisements.  As well as
            being the successor to RFC 2011, this MIB is also the
            successor to RFCs 2465 and 2466.  Published as RFC 4293."

    REVISION      "199411010000Z"
    DESCRIPTION
           "A separate MIB module (IP-MIB) for IP and ICMP management
            objects.  Published as RFC 2011."

    REVISION      "199103310000Z"
    DESCRIPTION
           "The initial revision of this MIB module was part of MIB-II,
            which was published as RFC 1213."
    ::= { mib-2 48}

--
-- The textual conventions we define and use in this MIB.
--

IpAddressOriginTC ::= TEXTUAL-CONVENTION
    STATUS     current
    DESCRIPTION
           "The origin of the address.

            manual(2) indicates that the address was manually configured
            to a specified address, e.g., by user configuration.

            dhcp(4) indicates an address that was assigned to this
            system by a DHCP server.

            linklayer(5) indicates an address created by IPv6 stateless

            auto-configuration.

            random(6) indicates an address chosen by the system at
            random, e.g., an IPv4 address within 169.254/16, or an RFC
            3041 privacy address."
    SYNTAX     INTEGER {
        other(1),
        manual(2),
        dhcp(4),
        linklayer(5),
        random(6)
    }

IpAddressStatusTC ::= TEXTUAL-CONVENTION
    STATUS     current
    DESCRIPTION
           "The status of an address.  Most of the states correspond to
            states from the IPv6 Stateless Address Autoconfiguration
            protocol.

            The preferred(1) state indicates that this is a valid
            address that can appear as the destination or source address
            of a packet.

            The deprecated(2) state indicates that this is a valid but
            deprecated address that should no longer be used as a source
            address in new communications, but packets addressed to such
            an address are processed as expected.

            The invalid(3) state indicates that this isn't a valid
            address and it shouldn't appear as the destination or source
            address of a packet.

            The inaccessible(4) state indicates that the address is not
            accessible because the interface to which this address is
            assigned is not operational.

            The unknown(5) state indicates that the status cannot be
            determined for some reason.

            The tentative(6) state indicates that the uniqueness of the
            address on the link is being verified.  Addresses in this
            state should not be used for general communication and
            should only be used to determine the uniqueness of the
            address.

            The duplicate(7) state indicates the address has been
            determined to be non-unique on the link and so must not be

            used.

            The optimistic(8) state indicates the address is available
            for use, subject to restrictions, while its uniqueness on
            a link is being verified.

            In the absence of other information, an IPv4 address is
            always preferred(1)."
    REFERENCE "RFC 2462"
    SYNTAX     INTEGER {
        preferred(1),
        deprecated(2),
        invalid(3),
        inaccessible(4),
        unknown(5),
        tentative(6),
        duplicate(7),
        optimistic(8)
    }

IpAddressPrefixOriginTC ::= TEXTUAL-CONVENTION
    STATUS     current
    DESCRIPTION
           "The origin of this prefix.

            manual(2) indicates a prefix that was manually configured.

            wellknown(3) indicates a well-known prefix, e.g., 169.254/16
            for IPv4 auto-configuration or fe80::/10 for IPv6 link-local
            addresses.  Well known prefixes may be assigned by IANA,
            the address registries, or by specification in a standards
            track RFC.

            dhcp(4) indicates a prefix that was assigned by a DHCP
            server.

            routeradv(5) indicates a prefix learned from a router
            advertisement.

            Note: while IpAddressOriginTC and IpAddressPrefixOriginTC
            are similar, they are not identical.  The first defines how
            an address was created, while the second defines how a
            prefix was found."
    SYNTAX     INTEGER {
        other(1),
        manual(2),
        wellknown(3),
        dhcp(4),

        routeradv(5)
    }

Ipv6AddressIfIdentifierTC ::= TEXTUAL-CONVENTION
     DISPLAY-HINT "2x:"
     STATUS       current
     DESCRIPTION
       "This data type is used to model IPv6 address
       interface identifiers.  This is a binary string
       of up to 8 octets in network byte-order."
     SYNTAX      OCTET STRING (SIZE (0..8))

--
-- the IP general group
-- some objects that affect all of IPv4
--

ip       OBJECT IDENTIFIER ::= { mib-2 4 }

ipForwarding OBJECT-TYPE
    SYNTAX     INTEGER {
                    forwarding(1),    -- acting as a router
                    notForwarding(2)  -- NOT acting as a router
               }
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "The indication of whether this entity is acting as an IPv4
            router in respect to the forwarding of datagrams received
            by, but not addressed to, this entity.  IPv4 routers forward
            datagrams.  IPv4 hosts do not (except those source-routed
            via the host).

            When this object is written, the entity should save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system.
            Note: a stronger requirement is not used because this object
            was previously defined."
    ::= { ip 1 }

ipDefaultTTL OBJECT-TYPE
    SYNTAX     Integer32 (1..255)
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "The default value inserted into the Time-To-Live field of
            the IPv4 header of datagrams originated at this entity,
            whenever a TTL value is not supplied by the transport layer

            protocol.

            When this object is written, the entity should save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system.
            Note: a stronger requirement is not used because this object
            was previously defined."
    ::= { ip 2 }

ipReasmTimeout OBJECT-TYPE
    SYNTAX     Integer32
    UNITS      "seconds"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The maximum number of seconds that received fragments are
            held while they are awaiting reassembly at this entity."
    ::= { ip 13 }

--
-- the IPv6 general group
-- Some objects that affect all of IPv6
--

ipv6IpForwarding OBJECT-TYPE
    SYNTAX     INTEGER {
                    forwarding(1),    -- acting as a router
                    notForwarding(2)  -- NOT acting as a router
               }
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "The indication of whether this entity is acting as an IPv6
            router on any interface in respect to the forwarding of
            datagrams received by, but not addressed to, this entity.
            IPv6 routers forward datagrams.  IPv6 hosts do not (except
            those source-routed via the host).

            When this object is written, the entity SHOULD save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system."
    ::= { ip 25 }

ipv6IpDefaultHopLimit OBJECT-TYPE
    SYNTAX     Integer32 (0..255)
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION

           "The default value inserted into the Hop Limit field of the
            IPv6 header of datagrams originated at this entity whenever
            a Hop Limit value is not supplied by the transport layer
            protocol.

            When this object is written, the entity SHOULD save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system."
    REFERENCE "RFC 2461 Section 6.3.2"
    ::= { ip 26 }

--
-- IPv4 Interface Table
--

ipv4InterfaceTableLastChange OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime on the most recent occasion at which
            a row in the ipv4InterfaceTable was added or deleted, or
            when an ipv4InterfaceReasmMaxSize or an
            ipv4InterfaceEnableStatus object was modified.

            If new objects are added to the ipv4InterfaceTable that
            require the ipv4InterfaceTableLastChange to be updated when
            they are modified, they must specify that requirement in
            their description clause."
    ::= { ip 27 }

ipv4InterfaceTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF Ipv4InterfaceEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table containing per-interface IPv4-specific
            information."
    ::= { ip 28 }

ipv4InterfaceEntry OBJECT-TYPE
    SYNTAX     Ipv4InterfaceEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "An entry containing IPv4-specific information for a specific
            interface."
    INDEX { ipv4InterfaceIfIndex }

    ::= { ipv4InterfaceTable 1 }

Ipv4InterfaceEntry ::= SEQUENCE {
        ipv4InterfaceIfIndex         InterfaceIndex,
        ipv4InterfaceReasmMaxSize    Integer32,
        ipv4InterfaceEnableStatus    INTEGER,
        ipv4InterfaceRetransmitTime  Unsigned32
    }

ipv4InterfaceIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipv4InterfaceEntry 1 }

ipv4InterfaceReasmMaxSize OBJECT-TYPE
    SYNTAX     Integer32 (0..65535)
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The size of the largest IPv4 datagram that this entity can
            re-assemble from incoming IPv4 fragmented datagrams received
            on this interface."
    ::= { ipv4InterfaceEntry 2 }

ipv4InterfaceEnableStatus OBJECT-TYPE
    SYNTAX     INTEGER {
                 up(1),
                 down(2)
    }
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "The indication of whether IPv4 is enabled (up) or disabled
            (down) on this interface.  This object does not affect the
            state of the interface itself, only its connection to an
            IPv4 stack.  The IF-MIB should be used to control the state
            of the interface."
    ::= { ipv4InterfaceEntry 3 }

ipv4InterfaceRetransmitTime OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "milliseconds"

    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The time between retransmissions of ARP requests to a
            neighbor when resolving the address or when probing the
            reachability of a neighbor."
    REFERENCE "RFC 1122"
    DEFVAL { 1000 }
    ::= { ipv4InterfaceEntry 4 }

--
-- v6 interface table
--

ipv6InterfaceTableLastChange OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime on the most recent occasion at which
            a row in the ipv6InterfaceTable was added or deleted or when
            an ipv6InterfaceReasmMaxSize, ipv6InterfaceIdentifier,
            ipv6InterfaceEnableStatus, ipv6InterfaceReachableTime,
            ipv6InterfaceRetransmitTime, or ipv6InterfaceForwarding
            object was modified.

            If new objects are added to the ipv6InterfaceTable that
            require the ipv6InterfaceTableLastChange to be updated when
            they are modified, they must specify that requirement in
            their description clause."
    ::= { ip 29 }

ipv6InterfaceTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF Ipv6InterfaceEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table containing per-interface IPv6-specific
            information."
    ::= { ip 30 }

ipv6InterfaceEntry OBJECT-TYPE
    SYNTAX     Ipv6InterfaceEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "An entry containing IPv6-specific information for a given
            interface."

    INDEX { ipv6InterfaceIfIndex }
    ::= { ipv6InterfaceTable 1 }

Ipv6InterfaceEntry ::= SEQUENCE {
        ipv6InterfaceIfIndex         InterfaceIndex,
        ipv6InterfaceReasmMaxSize    Unsigned32,
        ipv6InterfaceIdentifier      Ipv6AddressIfIdentifierTC,
        ipv6InterfaceEnableStatus    INTEGER,
        ipv6InterfaceReachableTime   Unsigned32,
        ipv6InterfaceRetransmitTime  Unsigned32,
        ipv6InterfaceForwarding      INTEGER
    }

ipv6InterfaceIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipv6InterfaceEntry 1 }

ipv6InterfaceReasmMaxSize OBJECT-TYPE
    SYNTAX     Unsigned32 (1500..65535)
    UNITS      "octets"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The size of the largest IPv6 datagram that this entity can
            re-assemble from incoming IPv6 fragmented datagrams received
            on this interface."
    ::= { ipv6InterfaceEntry 2 }

ipv6InterfaceIdentifier OBJECT-TYPE
    SYNTAX     Ipv6AddressIfIdentifierTC
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The Interface Identifier for this interface.  The Interface
            Identifier is combined with an address prefix to form an
            interface address.

            By default, the Interface Identifier is auto-configured
            according to the rules of the link type to which this
            interface is attached.

            A zero length identifier may be used where appropriate.  One
            possible example is a loopback interface."
    ::= { ipv6InterfaceEntry 3 }

-- This object ID is reserved as it was used in earlier versions of
-- the MIB module.  In theory, OIDs are not assigned until the
-- specification is released as an RFC; however, as some companies
-- may have shipped code based on earlier versions of the MIB, it
-- seems best to reserve this OID.  This OID had been
-- ipv6InterfacePhysicalAddress.
-- ::= { ipv6InterfaceEntry 4}

ipv6InterfaceEnableStatus OBJECT-TYPE
    SYNTAX     INTEGER {
                 up(1),
                 down(2)
    }
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "The indication of whether IPv6 is enabled (up) or disabled
            (down) on this interface.  This object does not affect the
            state of the interface itself, only its connection to an
            IPv6 stack.  The IF-MIB should be used to control the state
            of the interface.

            When this object is written, the entity SHOULD save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system."
    ::= { ipv6InterfaceEntry 5 }

ipv6InterfaceReachableTime OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "milliseconds"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The time a neighbor is considered reachable after receiving
            a reachability confirmation."
    REFERENCE "RFC 2461, Section 6.3.2"
    ::= { ipv6InterfaceEntry 6 }

ipv6InterfaceRetransmitTime OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "milliseconds"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION

           "The time between retransmissions of Neighbor Solicitation
            messages to a neighbor when resolving the address or when
            probing the reachability of a neighbor."
    REFERENCE "RFC 2461, Section 6.3.2"
    ::= { ipv6InterfaceEntry 7 }

ipv6InterfaceForwarding OBJECT-TYPE
    SYNTAX     INTEGER {
                    forwarding(1),    -- acting as a router
                    notForwarding(2)  -- NOT acting as a router
               }
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "The indication of whether this entity is acting as an IPv6
            router on this interface with respect to the forwarding of
            datagrams received by, but not addressed to, this entity.
            IPv6 routers forward datagrams.  IPv6 hosts do not (except
            those source-routed via the host).

            This object is constrained by ipv6IpForwarding and is
            ignored if ipv6IpForwarding is set to notForwarding.  Those
            systems that do not provide per-interface control of the
            forwarding function should set this object to forwarding for
            all interfaces and allow the ipv6IpForwarding object to
            control the forwarding capability.

            When this object is written, the entity SHOULD save the
            change to non-volatile storage and restore the object from
            non-volatile storage upon re-initialization of the system."
    ::= { ipv6InterfaceEntry 8 }

--
-- Per-Interface or System-Wide IP statistics.
--
-- The following two tables, ipSystemStatsTable and ipIfStatsTable,
-- are intended to provide the same counters at different granularities.
-- The ipSystemStatsTable provides system wide counters aggregating
-- the traffic counters for all interfaces for a given address type.
-- The ipIfStatsTable provides the same counters but for specific
-- interfaces rather than as an aggregate.
--
-- Note well: If a system provides both system-wide and interface-
-- specific values, the system-wide value may not be equal to the sum
-- of the interface-specific values across all interfaces due to e.g.,
-- dynamic interface creation/deletion.
--
-- Note well: Both of these tables contain some items that are

-- represented by two objects, representing the value in either 32
-- or 64 bits.  For those objects, the 32-bit value MUST be the low
-- order 32 bits of the 64-bit value.  Also note that the 32-bit
-- counters must be included when the 64-bit counters are included.

ipTrafficStats OBJECT IDENTIFIER ::= { ip 31 }

ipSystemStatsTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpSystemStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table containing system wide, IP version specific
            traffic statistics.  This table and the ipIfStatsTable
            contain similar objects whose difference is in their
            granularity.  Where this table contains system wide traffic
            statistics, the ipIfStatsTable contains the same statistics
            but counted on a per-interface basis."
    ::= { ipTrafficStats 1 }

ipSystemStatsEntry OBJECT-TYPE
    SYNTAX     IpSystemStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "A statistics entry containing system-wide objects for a
            particular IP version."
    INDEX { ipSystemStatsIPVersion }
    ::= { ipSystemStatsTable 1 }

IpSystemStatsEntry ::= SEQUENCE {
        ipSystemStatsIPVersion           InetVersion,
        ipSystemStatsInReceives          Counter32,
        ipSystemStatsHCInReceives        Counter64,
        ipSystemStatsInOctets            Counter32,
        ipSystemStatsHCInOctets          Counter64,
        ipSystemStatsInHdrErrors         Counter32,
        ipSystemStatsInNoRoutes          Counter32,
        ipSystemStatsInAddrErrors        Counter32,
        ipSystemStatsInUnknownProtos     Counter32,
        ipSystemStatsInTruncatedPkts     Counter32,
        ipSystemStatsInForwDatagrams     Counter32,
        ipSystemStatsHCInForwDatagrams   Counter64,
        ipSystemStatsReasmReqds          Counter32,
        ipSystemStatsReasmOKs            Counter32,
        ipSystemStatsReasmFails          Counter32,
        ipSystemStatsInDiscards          Counter32,
        ipSystemStatsInDelivers          Counter32,

        ipSystemStatsHCInDelivers        Counter64,
        ipSystemStatsOutRequests         Counter32,
        ipSystemStatsHCOutRequests       Counter64,
        ipSystemStatsOutNoRoutes         Counter32,
        ipSystemStatsOutForwDatagrams    Counter32,
        ipSystemStatsHCOutForwDatagrams  Counter64,
        ipSystemStatsOutDiscards         Counter32,
        ipSystemStatsOutFragReqds        Counter32,
        ipSystemStatsOutFragOKs          Counter32,
        ipSystemStatsOutFragFails        Counter32,
        ipSystemStatsOutFragCreates      Counter32,
        ipSystemStatsOutTransmits        Counter32,
        ipSystemStatsHCOutTransmits      Counter64,
        ipSystemStatsOutOctets           Counter32,
        ipSystemStatsHCOutOctets         Counter64,
        ipSystemStatsInMcastPkts         Counter32,
        ipSystemStatsHCInMcastPkts       Counter64,
        ipSystemStatsInMcastOctets       Counter32,
        ipSystemStatsHCInMcastOctets     Counter64,
        ipSystemStatsOutMcastPkts        Counter32,
        ipSystemStatsHCOutMcastPkts      Counter64,
        ipSystemStatsOutMcastOctets      Counter32,
        ipSystemStatsHCOutMcastOctets    Counter64,
        ipSystemStatsInBcastPkts         Counter32,
        ipSystemStatsHCInBcastPkts       Counter64,
        ipSystemStatsOutBcastPkts        Counter32,
        ipSystemStatsHCOutBcastPkts      Counter64,
        ipSystemStatsDiscontinuityTime   TimeStamp,
        ipSystemStatsRefreshRate         Unsigned32
    }

ipSystemStatsIPVersion OBJECT-TYPE
    SYNTAX     InetVersion
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP version of this row."
    ::= { ipSystemStatsEntry 1 }

-- This object ID is reserved to allow the IDs for this table's objects
-- to align with the objects in the ipIfStatsTable.
-- ::= { ipSystemStatsEntry 2 }

ipSystemStatsInReceives OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION

           "The total number of input IP datagrams received, including
            those received in error.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 3 }

ipSystemStatsHCInReceives OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of input IP datagrams received, including
            those received in error.  This object counts the same
            datagrams as ipSystemStatsInReceives, but allows for larger
            values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 4 }

ipSystemStatsInOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in input IP datagrams,
            including those received in error.  Octets from datagrams
            counted in ipSystemStatsInReceives MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 5 }

ipSystemStatsHCInOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in input IP datagrams,
            including those received in error.  This object counts the
            same octets as ipSystemStatsInOctets, but allows for larger

            values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 6 }

ipSystemStatsInHdrErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded due to errors in
            their IP headers, including version number mismatch, other
            format errors, hop count exceeded, errors discovered in
            processing their IP options, etc.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 7 }

ipSystemStatsInNoRoutes OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded because no route
            could be found to transmit them to their destination.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 8 }

ipSystemStatsInAddrErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded because the IP
            address in their IP header's destination field was not a
            valid address to be received at this entity.  This count
            includes invalid addresses (e.g., ::0).  For entities
            that are not IP routers and therefore do not forward

            datagrams, this counter includes datagrams discarded
            because the destination address was not a local address.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 9 }

ipSystemStatsInUnknownProtos OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of locally-addressed IP datagrams received
            successfully but discarded because of an unknown or
            unsupported protocol.

            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 10 }

ipSystemStatsInTruncatedPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded because the
            datagram frame didn't carry enough data.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 11 }

ipSystemStatsInForwDatagrams OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION

           "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  In entities that do not act as IP routers,
            this counter will include only those datagrams that were
            Source-Routed via this entity, and the Source-Route
            processing was successful.

            When tracking interface statistics, the counter of the
            incoming interface is incremented for each datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 12 }

ipSystemStatsHCInForwDatagrams OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  This object counts the same packets as
            ipSystemStatsInForwDatagrams, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 13 }

ipSystemStatsReasmReqds OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP fragments received that needed to be
            reassembled at this interface.

            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.

            Discontinuities in the value of this counter can occur at

            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 14 }

ipSystemStatsReasmOKs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP datagrams successfully reassembled.

            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 15 }

ipSystemStatsReasmFails OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of failures detected by the IP re-assembly
            algorithm (for whatever reason: timed out, errors, etc.).
            Note that this is not necessarily a count of discarded IP
            fragments since some algorithms (notably the algorithm in
            RFC 815) can lose track of the number of fragments by
            combining them as they are received.

            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 16 }

ipSystemStatsInDiscards OBJECT-TYPE
    SYNTAX     Counter32

    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams for which no problems were
            encountered to prevent their continued processing, but
            were discarded (e.g., for lack of buffer space).  Note that
            this counter does not include any datagrams discarded while
            awaiting re-assembly.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 17 }

ipSystemStatsInDelivers OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).

            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 18 }

ipSystemStatsHCInDelivers OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).  This object counts the
            same packets as ipSystemStatsInDelivers, but allows for
            larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."

    ::= { ipSystemStatsEntry 19 }

ipSystemStatsOutRequests OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  Note that this counter does not include any
            datagrams counted in ipSystemStatsOutForwDatagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 20 }

ipSystemStatsHCOutRequests OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  This object counts the same packets as
            ipSystemStatsOutRequests, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 21 }

ipSystemStatsOutNoRoutes OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of locally generated IP datagrams discarded
            because no route could be found to transmit them to their
            destination.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 22 }

ipSystemStatsOutForwDatagrams OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  In entities
            that do not act as IP routers, this counter will include
            only those datagrams that were Source-Routed via this
            entity, and the Source-Route processing was successful.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            forwarded datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 23 }

ipSystemStatsHCOutForwDatagrams OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  This object
            counts the same packets as ipSystemStatsOutForwDatagrams,
            but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 24 }

ipSystemStatsOutDiscards OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of output IP datagrams for which no problem was
            encountered to prevent their transmission to their
            destination, but were discarded (e.g., for lack of
            buffer space).  Note that this counter would include

            datagrams counted in ipSystemStatsOutForwDatagrams if any
            such datagrams met this (discretionary) discard criterion.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 25 }

ipSystemStatsOutFragReqds OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP datagrams that would require fragmentation
            in order to be transmitted.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 26 }

ipSystemStatsOutFragOKs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP datagrams that have been successfully
            fragmented.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 27 }

ipSystemStatsOutFragFails OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only

    STATUS     current
    DESCRIPTION
           "The number of IP datagrams that have been discarded because
            they needed to be fragmented but could not be.  This
            includes IPv4 packets that have the DF bit set and IPv6
            packets that are being forwarded and exceed the outgoing
            link MTU.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for an unsuccessfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 28 }

ipSystemStatsOutFragCreates OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of output datagram fragments that have been
            generated as a result of IP fragmentation.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 29 }

ipSystemStatsOutTransmits OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This includes
            datagrams generated locally and those forwarded by this
            entity.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other

            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 30 }

ipSystemStatsHCOutTransmits OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This object counts
            the same datagrams as ipSystemStatsOutTransmits, but allows
            for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 31 }

ipSystemStatsOutOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  Octets from datagrams
            counted in ipSystemStatsOutTransmits MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 32 }

ipSystemStatsHCOutOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  This objects counts the same
            octets as ipSystemStatsOutOctets, but allows for larger
            values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of

            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 33 }

ipSystemStatsInMcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams received.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 34 }

ipSystemStatsHCInMcastPkts OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams received.  This object
            counts the same datagrams as ipSystemStatsInMcastPkts but
            allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 35 }

ipSystemStatsInMcastOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in IP multicast
            datagrams.  Octets from datagrams counted in
            ipSystemStatsInMcastPkts MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 36 }

ipSystemStatsHCInMcastOctets OBJECT-TYPE
    SYNTAX     Counter64

    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in IP multicast
            datagrams.  This object counts the same octets as
            ipSystemStatsInMcastOctets, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 37 }

ipSystemStatsOutMcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams transmitted.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 38 }

ipSystemStatsHCOutMcastPkts OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams transmitted.  This
            object counts the same datagrams as
            ipSystemStatsOutMcastPkts, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 39 }

ipSystemStatsOutMcastOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets transmitted in IP multicast
            datagrams.  Octets from datagrams counted in

            ipSystemStatsOutMcastPkts MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 40 }

ipSystemStatsHCOutMcastOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets transmitted in IP multicast
            datagrams.  This object counts the same octets as
            ipSystemStatsOutMcastOctets, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 41 }

ipSystemStatsInBcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams received.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 42 }

ipSystemStatsHCInBcastPkts OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams received.  This object
            counts the same datagrams as ipSystemStatsInBcastPkts but
            allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of

            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 43 }

ipSystemStatsOutBcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams transmitted.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 44 }

ipSystemStatsHCOutBcastPkts OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams transmitted.  This
            object counts the same datagrams as
            ipSystemStatsOutBcastPkts, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipSystemStatsDiscontinuityTime."
    ::= { ipSystemStatsEntry 45 }

ipSystemStatsDiscontinuityTime OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime on the most recent occasion at which
            any one or more of this entry's counters suffered a
            discontinuity.

            If no such discontinuities have occurred since the last re-
            initialization of the local management subsystem, then this
            object contains a zero value."
    ::= { ipSystemStatsEntry 46 }

ipSystemStatsRefreshRate OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "milli-seconds"

    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The minimum reasonable polling interval for this entry.
            This object provides an indication of the minimum amount of
            time required to update the counters in this entry."
    ::= { ipSystemStatsEntry 47 }

ipIfStatsTableLastChange OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime on the most recent occasion at which
            a row in the ipIfStatsTable was added or deleted.

            If new objects are added to the ipIfStatsTable that require
            the ipIfStatsTableLastChange to be updated when they are
            modified, they must specify that requirement in their
            description clause."
    ::= { ipTrafficStats 2 }

ipIfStatsTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpIfStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table containing per-interface traffic statistics.  This
            table and the ipSystemStatsTable contain similar objects
            whose difference is in their granularity.  Where this table
            contains per-interface statistics, the ipSystemStatsTable
            contains the same statistics, but counted on a system wide
            basis."
    ::= { ipTrafficStats 3 }

ipIfStatsEntry OBJECT-TYPE
    SYNTAX     IpIfStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "An interface statistics entry containing objects for a
            particular interface and version of IP."
    INDEX { ipIfStatsIPVersion, ipIfStatsIfIndex }
    ::= { ipIfStatsTable 1 }

IpIfStatsEntry ::= SEQUENCE {
        ipIfStatsIPVersion           InetVersion,
        ipIfStatsIfIndex             InterfaceIndex,

        ipIfStatsInReceives          Counter32,
        ipIfStatsHCInReceives        Counter64,
        ipIfStatsInOctets            Counter32,
        ipIfStatsHCInOctets          Counter64,
        ipIfStatsInHdrErrors         Counter32,
        ipIfStatsInNoRoutes          Counter32,
        ipIfStatsInAddrErrors        Counter32,
        ipIfStatsInUnknownProtos     Counter32,
        ipIfStatsInTruncatedPkts     Counter32,
        ipIfStatsInForwDatagrams     Counter32,
        ipIfStatsHCInForwDatagrams   Counter64,
        ipIfStatsReasmReqds          Counter32,
        ipIfStatsReasmOKs            Counter32,
        ipIfStatsReasmFails          Counter32,
        ipIfStatsInDiscards          Counter32,
        ipIfStatsInDelivers          Counter32,
        ipIfStatsHCInDelivers        Counter64,
        ipIfStatsOutRequests         Counter32,
        ipIfStatsHCOutRequests       Counter64,
        ipIfStatsOutForwDatagrams    Counter32,
        ipIfStatsHCOutForwDatagrams  Counter64,
        ipIfStatsOutDiscards         Counter32,
        ipIfStatsOutFragReqds        Counter32,
        ipIfStatsOutFragOKs          Counter32,
        ipIfStatsOutFragFails        Counter32,
        ipIfStatsOutFragCreates      Counter32,
        ipIfStatsOutTransmits        Counter32,
        ipIfStatsHCOutTransmits      Counter64,
        ipIfStatsOutOctets           Counter32,
        ipIfStatsHCOutOctets         Counter64,
        ipIfStatsInMcastPkts         Counter32,
        ipIfStatsHCInMcastPkts       Counter64,
        ipIfStatsInMcastOctets       Counter32,
        ipIfStatsHCInMcastOctets     Counter64,
        ipIfStatsOutMcastPkts        Counter32,
        ipIfStatsHCOutMcastPkts      Counter64,
        ipIfStatsOutMcastOctets      Counter32,
        ipIfStatsHCOutMcastOctets    Counter64,
        ipIfStatsInBcastPkts         Counter32,
        ipIfStatsHCInBcastPkts       Counter64,
        ipIfStatsOutBcastPkts        Counter32,
        ipIfStatsHCOutBcastPkts      Counter64,
        ipIfStatsDiscontinuityTime   TimeStamp,
        ipIfStatsRefreshRate         Unsigned32
    }

ipIfStatsIPVersion OBJECT-TYPE
    SYNTAX     InetVersion

    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP version of this row."
    ::= { ipIfStatsEntry 1 }

ipIfStatsIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipIfStatsEntry 2 }

ipIfStatsInReceives OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of input IP datagrams received, including
            those received in error.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 3 }

ipIfStatsHCInReceives OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of input IP datagrams received, including
            those received in error.  This object counts the same
            datagrams as ipIfStatsInReceives, but allows for larger
            values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 4 }

ipIfStatsInOctets OBJECT-TYPE

    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in input IP datagrams,
            including those received in error.  Octets from datagrams
            counted in ipIfStatsInReceives MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 5 }

ipIfStatsHCInOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in input IP datagrams,
            including those received in error.  This object counts the
            same octets as ipIfStatsInOctets, but allows for larger
            values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 6 }

ipIfStatsInHdrErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded due to errors in
            their IP headers, including version number mismatch, other
            format errors, hop count exceeded, errors discovered in
            processing their IP options, etc.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 7 }

ipIfStatsInNoRoutes OBJECT-TYPE
    SYNTAX     Counter32

    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded because no route
            could be found to transmit them to their destination.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 8 }

ipIfStatsInAddrErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded because the IP
            address in their IP header's destination field was not a
            valid address to be received at this entity.  This count
            includes invalid addresses (e.g., ::0).  For entities that
            are not IP routers and therefore do not forward datagrams,
            this counter includes datagrams discarded because the
            destination address was not a local address.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 9 }

ipIfStatsInUnknownProtos OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of locally-addressed IP datagrams received
            successfully but discarded because of an unknown or
            unsupported protocol.

            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of

            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 10 }

ipIfStatsInTruncatedPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams discarded because the
            datagram frame didn't carry enough data.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 11 }

ipIfStatsInForwDatagrams OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  In entities that do not act as IP routers,
            this counter will include only those datagrams that were
            Source-Routed via this entity, and the Source-Route
            processing was successful.

            When tracking interface statistics, the counter of the
            incoming interface is incremented for each datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 12 }

ipIfStatsHCInForwDatagrams OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input datagrams for which this entity was not
            their final IP destination and for which this entity
            attempted to find a route to forward them to that final
            destination.  This object counts the same packets as

            ipIfStatsInForwDatagrams, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 13 }

ipIfStatsReasmReqds OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP fragments received that needed to be
            reassembled at this interface.

            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 14 }

ipIfStatsReasmOKs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP datagrams successfully reassembled.

            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the datagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 15 }

ipIfStatsReasmFails OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only

    STATUS     current
    DESCRIPTION
           "The number of failures detected by the IP re-assembly
            algorithm (for whatever reason: timed out, errors, etc.).
            Note that this is not necessarily a count of discarded IP
            fragments since some algorithms (notably the algorithm in
            RFC 815) can lose track of the number of fragments by
            combining them as they are received.

            When tracking interface statistics, the counter of the
            interface to which these fragments were addressed is
            incremented.  This interface might not be the same as the
            input interface for some of the fragments.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 16 }

ipIfStatsInDiscards OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input IP datagrams for which no problems were
            encountered to prevent their continued processing, but
            were discarded (e.g., for lack of buffer space).  Note that
            this counter does not include any datagrams discarded while
            awaiting re-assembly.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 17 }

ipIfStatsInDelivers OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).

            When tracking interface statistics, the counter of the
            interface to which these datagrams were addressed is
            incremented.  This interface might not be the same as the

            input interface for some of the datagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 18 }

ipIfStatsHCInDelivers OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of datagrams successfully delivered to IP
            user-protocols (including ICMP).  This object counts the
            same packets as ipIfStatsInDelivers, but allows for larger
            values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 19 }

ipIfStatsOutRequests OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  Note that this counter does not include any
            datagrams counted in ipIfStatsOutForwDatagrams.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 20 }

ipIfStatsHCOutRequests OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that local IP user-
            protocols (including ICMP) supplied to IP in requests for
            transmission.  This object counts the same packets as

            ipIfStatsOutRequests, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 21 }

-- This object ID is reserved to allow the IDs for this table's objects
-- to align with the objects in the ipSystemStatsTable.
-- ::= {ipIfStatsEntry 22}

ipIfStatsOutForwDatagrams OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  In entities
            that do not act as IP routers, this counter will include
            only those datagrams that were Source-Routed via this
            entity, and the Source-Route processing was successful.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            forwarded datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 23 }

ipIfStatsHCOutForwDatagrams OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of datagrams for which this entity was not their
            final IP destination and for which it was successful in
            finding a path to their final destination.  This object
            counts the same packets as ipIfStatsOutForwDatagrams, but
            allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of

            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 24 }

ipIfStatsOutDiscards OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of output IP datagrams for which no problem was
            encountered to prevent their transmission to their
            destination, but were discarded (e.g., for lack of
            buffer space).  Note that this counter would include
            datagrams counted in ipIfStatsOutForwDatagrams if any such
            datagrams met this (discretionary) discard criterion.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 25 }

ipIfStatsOutFragReqds OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP datagrams that would require fragmentation
            in order to be transmitted.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 26 }

ipIfStatsOutFragOKs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP datagrams that have been successfully
            fragmented.

            When tracking interface statistics, the counter of the

            outgoing interface is incremented for a successfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 27 }

ipIfStatsOutFragFails OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP datagrams that have been discarded because
            they needed to be fragmented but could not be.  This
            includes IPv4 packets that have the DF bit set and IPv6
            packets that are being forwarded and exceed the outgoing
            link MTU.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for an unsuccessfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 28 }

ipIfStatsOutFragCreates OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of output datagram fragments that have been
            generated as a result of IP fragmentation.

            When tracking interface statistics, the counter of the
            outgoing interface is incremented for a successfully
            fragmented datagram.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 29 }

ipIfStatsOutTransmits OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This includes
            datagrams generated locally and those forwarded by this
            entity.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 30 }

ipIfStatsHCOutTransmits OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of IP datagrams that this entity supplied
            to the lower layers for transmission.  This object counts
            the same datagrams as ipIfStatsOutTransmits, but allows for
            larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 31 }

ipIfStatsOutOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  Octets from datagrams
            counted in ipIfStatsOutTransmits MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 32 }

ipIfStatsHCOutOctets OBJECT-TYPE

    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets in IP datagrams delivered to the
            lower layers for transmission.  This objects counts the same
            octets as ipIfStatsOutOctets, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 33 }

ipIfStatsInMcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams received.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 34 }

ipIfStatsHCInMcastPkts OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams received.  This object
            counts the same datagrams as ipIfStatsInMcastPkts, but
            allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 35 }

ipIfStatsInMcastOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in IP multicast

            datagrams.  Octets from datagrams counted in
            ipIfStatsInMcastPkts MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 36 }

ipIfStatsHCInMcastOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets received in IP multicast
            datagrams.  This object counts the same octets as
            ipIfStatsInMcastOctets, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 37 }

ipIfStatsOutMcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams transmitted.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 38 }

ipIfStatsHCOutMcastPkts OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP multicast datagrams transmitted.  This
            object counts the same datagrams as ipIfStatsOutMcastPkts,
            but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other

            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 39 }

ipIfStatsOutMcastOctets OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets transmitted in IP multicast
            datagrams.  Octets from datagrams counted in
            ipIfStatsOutMcastPkts MUST be counted here.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 40 }

ipIfStatsHCOutMcastOctets OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of octets transmitted in IP multicast
            datagrams.  This object counts the same octets as
            ipIfStatsOutMcastOctets, but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 41 }

ipIfStatsInBcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams received.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 42 }

ipIfStatsHCInBcastPkts OBJECT-TYPE

    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams received.  This object
            counts the same datagrams as ipIfStatsInBcastPkts, but
            allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 43 }

ipIfStatsOutBcastPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams transmitted.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 44 }

ipIfStatsHCOutBcastPkts OBJECT-TYPE
    SYNTAX     Counter64
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of IP broadcast datagrams transmitted.  This
            object counts the same datagrams as ipIfStatsOutBcastPkts,
            but allows for larger values.

            Discontinuities in the value of this counter can occur at
            re-initialization of the management system, and at other
            times as indicated by the value of
            ipIfStatsDiscontinuityTime."
    ::= { ipIfStatsEntry 45 }

ipIfStatsDiscontinuityTime OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime on the most recent occasion at which

            any one or more of this entry's counters suffered a
            discontinuity.

            If no such discontinuities have occurred since the last re-
            initialization of the local management subsystem, then this
            object contains a zero value."
    ::= { ipIfStatsEntry 46 }

ipIfStatsRefreshRate OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS "milli-seconds"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The minimum reasonable polling interval for this entry.
            This object provides an indication of the minimum amount of
            time required to update the counters in this entry."
    ::= { ipIfStatsEntry 47 }

--
-- Internet Address Prefix table
--

ipAddressPrefixTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpAddressPrefixEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "This table allows the user to determine the source of an IP
            address or set of IP addresses, and allows other tables to
            share the information via pointer rather than by copying.

            For example, when the node configures both a unicast and
            anycast address for a prefix, the ipAddressPrefix objects
            for those addresses will point to a single row in this
            table.

            This table primarily provides support for IPv6 prefixes, and
            several of the objects are less meaningful for IPv4.  The
            table continues to allow IPv4 addresses to allow future
            flexibility.  In order to promote a common configuration,
            this document includes suggestions for default values for
            IPv4 prefixes.  Each of these values may be overridden if an
            object is meaningful to the node.

            All prefixes used by this entity should be included in this
            table independent of how the entity learned the prefix.
            (This table isn't limited to prefixes learned from router

            advertisements.)"
    ::= { ip 32 }

ipAddressPrefixEntry OBJECT-TYPE
    SYNTAX     IpAddressPrefixEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "An entry in the ipAddressPrefixTable."
    INDEX    { ipAddressPrefixIfIndex, ipAddressPrefixType,
               ipAddressPrefixPrefix, ipAddressPrefixLength }
    ::= { ipAddressPrefixTable 1 }

IpAddressPrefixEntry ::= SEQUENCE {
        ipAddressPrefixIfIndex               InterfaceIndex,
        ipAddressPrefixType                  InetAddressType,
        ipAddressPrefixPrefix                InetAddress,
        ipAddressPrefixLength                InetAddressPrefixLength,
        ipAddressPrefixOrigin                IpAddressPrefixOriginTC,
        ipAddressPrefixOnLinkFlag            TruthValue,
        ipAddressPrefixAutonomousFlag        TruthValue,
        ipAddressPrefixAdvPreferredLifetime  Unsigned32,
        ipAddressPrefixAdvValidLifetime      Unsigned32
    }

ipAddressPrefixIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface on
            which this prefix is configured.  The interface identified
            by a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipAddressPrefixEntry 1 }

ipAddressPrefixType OBJECT-TYPE
    SYNTAX     InetAddressType
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The address type of ipAddressPrefix."
    ::= { ipAddressPrefixEntry 2 }

ipAddressPrefixPrefix OBJECT-TYPE
    SYNTAX     InetAddress
    MAX-ACCESS not-accessible
    STATUS     current

    DESCRIPTION
           "The address prefix.  The address type of this object is
            specified in ipAddressPrefixType.  The length of this object
            is the standard length for objects of that type (4 or 16
            bytes).  Any bits after ipAddressPrefixLength must be zero.

            Implementors need to be aware that, if the size of
            ipAddressPrefixPrefix exceeds 114 octets, then OIDS of
            instances of columns in this row will have more than 128
            sub-identifiers and cannot be accessed using SNMPv1,
            SNMPv2c, or SNMPv3."
    ::= { ipAddressPrefixEntry 3 }

ipAddressPrefixLength OBJECT-TYPE
    SYNTAX     InetAddressPrefixLength
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The prefix length associated with this prefix.

            The value 0 has no special meaning for this object.  It
            simply refers to address '::/0'."
    ::= { ipAddressPrefixEntry 4 }

ipAddressPrefixOrigin OBJECT-TYPE
    SYNTAX     IpAddressPrefixOriginTC
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The origin of this prefix."
    ::= { ipAddressPrefixEntry 5 }

ipAddressPrefixOnLinkFlag OBJECT-TYPE
    SYNTAX     TruthValue
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "This object has the value 'true(1)', if this prefix can be
            used for on-link determination; otherwise, the value is
            'false(2)'.

            The default for IPv4 prefixes is 'true(1)'."
    REFERENCE "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462"
    ::= { ipAddressPrefixEntry 6 }

ipAddressPrefixAutonomousFlag OBJECT-TYPE
    SYNTAX     TruthValue

    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "Autonomous address configuration flag.  When true(1),
            indicates that this prefix can be used for autonomous
            address configuration (i.e., can be used to form a local
            interface address).  If false(2), it is not used to auto-
            configure a local interface address.

            The default for IPv4 prefixes is 'false(2)'."
    REFERENCE "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462"
    ::= { ipAddressPrefixEntry 7 }

ipAddressPrefixAdvPreferredLifetime OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "seconds"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The remaining length of time, in seconds, that this prefix
            will continue to be preferred, i.e., time until deprecation.

            A value of 4,294,967,295 represents infinity.

            The address generated from a deprecated prefix should no
            longer be used as a source address in new communications,
            but packets received on such an interface are processed as
            expected.

            The default for IPv4 prefixes is 4,294,967,295 (infinity)."
    REFERENCE "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462"
    ::= { ipAddressPrefixEntry 8 }

ipAddressPrefixAdvValidLifetime OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS       "seconds"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The remaining length of time, in seconds, that this prefix
            will continue to be valid, i.e., time until invalidation.  A
            value of 4,294,967,295 represents infinity.

            The address generated from an invalidated prefix should not
            appear as the destination or source address of a packet.

            The default for IPv4 prefixes is 4,294,967,295 (infinity)."
    REFERENCE "For IPv6 RFC 2461, especially sections 2 and 4.6.2 and
               RFC 2462"
    ::= { ipAddressPrefixEntry 9 }

--
-- Internet Address Table
--

ipAddressSpinLock OBJECT-TYPE
    SYNTAX     TestAndIncr
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "An advisory lock used to allow cooperating SNMP managers to
            coordinate their use of the set operation in creating or
            modifying rows within this table.

            In order to use this lock to coordinate the use of set
            operations, managers should first retrieve
            ipAddressTableSpinLock.  They should then determine the
            appropriate row to create or modify.  Finally, they should
            issue the appropriate set command, including the retrieved
            value of ipAddressSpinLock.  If another manager has altered
            the table in the meantime, then the value of
            ipAddressSpinLock will have changed, and the creation will
            fail as it will be specifying an incorrect value for
            ipAddressSpinLock.  It is suggested, but not required, that
            the ipAddressSpinLock be the first var bind for each set of
            objects representing a 'row' in a PDU."
    ::= { ip 33 }

ipAddressTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpAddressEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "This table contains addressing information relevant to the
            entity's interfaces.

            This table does not contain multicast address information.
            Tables for such information should be contained in multicast
            specific MIBs, such as RFC 3019.

            While this table is writable, the user will note that
            several objects, such as ipAddressOrigin, are not.  The
            intention in allowing a user to write to this table is to
            allow them to add or remove any entry that isn't

            permanent.  The user should be allowed to modify objects
            and entries when that would not cause inconsistencies
            within the table.  Allowing write access to objects, such
            as ipAddressOrigin, could allow a user to insert an entry
            and then label it incorrectly.

            Note well: When including IPv6 link-local addresses in this
            table, the entry must use an InetAddressType of 'ipv6z' in
            order to differentiate between the possible interfaces."
    ::= { ip 34 }

ipAddressEntry OBJECT-TYPE
    SYNTAX     IpAddressEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "An address mapping for a particular interface."
    INDEX { ipAddressAddrType, ipAddressAddr }
    ::= { ipAddressTable 1 }

IpAddressEntry ::= SEQUENCE {
        ipAddressAddrType     InetAddressType,
        ipAddressAddr         InetAddress,
        ipAddressIfIndex      InterfaceIndex,
        ipAddressType         INTEGER,
        ipAddressPrefix       RowPointer,
        ipAddressOrigin       IpAddressOriginTC,
        ipAddressStatus       IpAddressStatusTC,
        ipAddressCreated      TimeStamp,
        ipAddressLastChanged  TimeStamp,
        ipAddressRowStatus    RowStatus,
        ipAddressStorageType  StorageType
    }

ipAddressAddrType OBJECT-TYPE
    SYNTAX     InetAddressType
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The address type of ipAddressAddr."
    ::= { ipAddressEntry 1 }

ipAddressAddr OBJECT-TYPE
    SYNTAX     InetAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP address to which this entry's addressing information

            pertains.  The address type of this object is specified in
            ipAddressAddrType.

            Implementors need to be aware that if the size of
            ipAddressAddr exceeds 116 octets, then OIDS of instances of
            columns in this row will have more than 128 sub-identifiers
            and cannot be accessed using SNMPv1, SNMPv2c, or SNMPv3."
    ::= { ipAddressEntry 2 }

ipAddressIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipAddressEntry 3 }

ipAddressType OBJECT-TYPE
    SYNTAX     INTEGER {
                 unicast(1),
                 anycast(2),
                 broadcast(3)
    }
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The type of address.  broadcast(3) is not a valid value for
            IPv6 addresses (RFC 3513)."
    DEFVAL { unicast }
    ::= { ipAddressEntry 4 }

ipAddressPrefix OBJECT-TYPE
    SYNTAX     RowPointer
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "A pointer to the row in the prefix table to which this
            address belongs.  May be { 0 0 } if there is no such row."
    DEFVAL { zeroDotZero }
    ::= { ipAddressEntry 5 }

ipAddressOrigin OBJECT-TYPE
    SYNTAX     IpAddressOriginTC
    MAX-ACCESS read-only
    STATUS     current

    DESCRIPTION
           "The origin of the address."
    ::= { ipAddressEntry 6 }

ipAddressStatus OBJECT-TYPE
    SYNTAX     IpAddressStatusTC
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The status of the address, describing if the address can be
            used for communication.

            In the absence of other information, an IPv4 address is
            always preferred(1)."
    DEFVAL { preferred }
    ::= { ipAddressEntry 7 }

ipAddressCreated OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime at the time this entry was created.
            If this entry was created prior to the last re-
            initialization of the local network management subsystem,
            then this object contains a zero value."
    ::= { ipAddressEntry 8 }

ipAddressLastChanged OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime at the time this entry was last
            updated.  If this entry was updated prior to the last re-
            initialization of the local network management subsystem,
            then this object contains a zero value."
    ::= { ipAddressEntry 9 }

ipAddressRowStatus OBJECT-TYPE
    SYNTAX     RowStatus
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The status of this conceptual row.

            The RowStatus TC requires that this DESCRIPTION clause
            states under which circumstances other objects in this row

            can be modified.  The value of this object has no effect on
            whether other objects in this conceptual row can be
            modified.

            A conceptual row can not be made active until the
            ipAddressIfIndex has been set to a valid index."
    ::= { ipAddressEntry 10 }

ipAddressStorageType OBJECT-TYPE
    SYNTAX     StorageType
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The storage type for this conceptual row.  If this object
            has a value of 'permanent', then no other objects are
            required to be able to be modified."
    DEFVAL { volatile }
    ::= { ipAddressEntry 11 }

--
-- the Internet Address Translation table
--

ipNetToPhysicalTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpNetToPhysicalEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP Address Translation table used for mapping from IP
            addresses to physical addresses.

            The Address Translation tables contain the IP address to
            'physical' address equivalences.  Some interfaces do not use
            translation tables for determining address equivalences
            (e.g., DDN-X.25 has an algorithmic method); if all
            interfaces are of this type, then the Address Translation
            table is empty, i.e., has zero entries.

            While many protocols may be used to populate this table, ARP
            and Neighbor Discovery are the most likely
            options."
    REFERENCE "RFC 826 and RFC 2461"
    ::= { ip 35 }

ipNetToPhysicalEntry OBJECT-TYPE
    SYNTAX     IpNetToPhysicalEntry
    MAX-ACCESS not-accessible
    STATUS     current

    DESCRIPTION
           "Each entry contains one IP address to `physical' address
            equivalence."
    INDEX       { ipNetToPhysicalIfIndex,
                  ipNetToPhysicalNetAddressType,
                  ipNetToPhysicalNetAddress }
    ::= { ipNetToPhysicalTable 1 }

IpNetToPhysicalEntry ::= SEQUENCE {
        ipNetToPhysicalIfIndex         InterfaceIndex,
        ipNetToPhysicalNetAddressType  InetAddressType,
        ipNetToPhysicalNetAddress      InetAddress,
        ipNetToPhysicalPhysAddress     PhysAddress,
        ipNetToPhysicalLastUpdated     TimeStamp,
        ipNetToPhysicalType            INTEGER,
        ipNetToPhysicalState           INTEGER,
        ipNetToPhysicalRowStatus       RowStatus
    }

ipNetToPhysicalIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipNetToPhysicalEntry 1 }

ipNetToPhysicalNetAddressType OBJECT-TYPE
    SYNTAX     InetAddressType
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The type of ipNetToPhysicalNetAddress."
    ::= { ipNetToPhysicalEntry 2 }

ipNetToPhysicalNetAddress OBJECT-TYPE
    SYNTAX     InetAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP Address corresponding to the media-dependent
            `physical' address.  The address type of this object is
            specified in ipNetToPhysicalAddressType.

            Implementors need to be aware that if the size of

            ipNetToPhysicalNetAddress exceeds 115 octets, then OIDS of
            instances of columns in this row will have more than 128
            sub-identifiers and cannot be accessed using SNMPv1,
            SNMPv2c, or SNMPv3."
    ::= { ipNetToPhysicalEntry 3 }

ipNetToPhysicalPhysAddress OBJECT-TYPE
    SYNTAX     PhysAddress (SIZE(0..65535))
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The media-dependent `physical' address.

            As the entries in this table are typically not persistent
            when this object is written the entity SHOULD NOT save the
            change to non-volatile storage."
    ::= { ipNetToPhysicalEntry 4 }

ipNetToPhysicalLastUpdated OBJECT-TYPE
    SYNTAX     TimeStamp
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The value of sysUpTime at the time this entry was last
            updated.  If this entry was updated prior to the last re-
            initialization of the local network management subsystem,
            then this object contains a zero value."
    ::= { ipNetToPhysicalEntry 5 }

ipNetToPhysicalType OBJECT-TYPE
    SYNTAX     INTEGER {
                other(1),        -- none of the following
                invalid(2),      -- an invalidated mapping
                dynamic(3),
                static(4),
                local(5)         -- local interface
            }
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The type of mapping.

            Setting this object to the value invalid(2) has the effect
            of invalidating the corresponding entry in the
            ipNetToPhysicalTable.  That is, it effectively dis-
            associates the interface identified with said entry from the
            mapping identified with said entry.  It is an
            implementation-specific matter as to whether the agent

            removes an invalidated entry from the table.  Accordingly,
            management stations must be prepared to receive tabular
            information from agents that corresponds to entries not
            currently in use.  Proper interpretation of such entries
            requires examination of the relevant ipNetToPhysicalType
            object.

            The 'dynamic(3)' type indicates that the IP address to
            physical addresses mapping has been dynamically resolved
            using e.g., IPv4 ARP or the IPv6 Neighbor Discovery
            protocol.

            The 'static(4)' type indicates that the mapping has been
            statically configured.  Both of these refer to entries that
            provide mappings for other entities addresses.

            The 'local(5)' type indicates that the mapping is provided
            for an entity's own interface address.

            As the entries in this table are typically not persistent
            when this object is written the entity SHOULD NOT save the
            change to non-volatile storage."
    DEFVAL { static }
    ::= { ipNetToPhysicalEntry 6 }

ipNetToPhysicalState OBJECT-TYPE
    SYNTAX     INTEGER {
                     reachable(1), -- confirmed reachability

                     stale(2),     -- unconfirmed reachability

                     delay(3),     -- waiting for reachability
                                   -- confirmation before entering
                                   -- the probe state

                     probe(4),     -- actively probing

                     invalid(5),   -- an invalidated mapping

                     unknown(6),   -- state can not be determined
                                   -- for some reason.

                     incomplete(7) -- address resolution is being
                                   -- performed.
                    }
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION

           "The Neighbor Unreachability Detection state for the
            interface when the address mapping in this entry is used.
            If Neighbor Unreachability Detection is not in use (e.g. for
            IPv4), this object is always unknown(6)."
    REFERENCE "RFC 2461"
    ::= { ipNetToPhysicalEntry 7 }

ipNetToPhysicalRowStatus OBJECT-TYPE
    SYNTAX     RowStatus
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The status of this conceptual row.

            The RowStatus TC requires that this DESCRIPTION clause
            states under which circumstances other objects in this row
            can be modified.  The value of this object has no effect on
            whether other objects in this conceptual row can be
            modified.

            A conceptual row can not be made active until the
            ipNetToPhysicalPhysAddress object has been set.

            Note that if the ipNetToPhysicalType is set to 'invalid',
            the managed node may delete the entry independent of the
            state of this object."
    ::= { ipNetToPhysicalEntry 8 }

--
-- The IPv6 Scope Zone Index Table.
--

ipv6ScopeZoneIndexTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF Ipv6ScopeZoneIndexEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table used to describe IPv6 unicast and multicast scope
            zones.

            For those objects that have names rather than numbers, the
            names were chosen to coincide with the names used in the
            IPv6 address architecture document. "
    REFERENCE "Section 2.7 of RFC 4291"
    ::= { ip 36 }

ipv6ScopeZoneIndexEntry OBJECT-TYPE
    SYNTAX     Ipv6ScopeZoneIndexEntry

    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "Each entry contains the list of scope identifiers on a given
            interface."
    INDEX { ipv6ScopeZoneIndexIfIndex }
    ::= { ipv6ScopeZoneIndexTable 1 }

Ipv6ScopeZoneIndexEntry ::= SEQUENCE {
        ipv6ScopeZoneIndexIfIndex            InterfaceIndex,
        ipv6ScopeZoneIndexLinkLocal          InetZoneIndex,
        ipv6ScopeZoneIndex3                  InetZoneIndex,
        ipv6ScopeZoneIndexAdminLocal         InetZoneIndex,
        ipv6ScopeZoneIndexSiteLocal          InetZoneIndex,
        ipv6ScopeZoneIndex6                  InetZoneIndex,
        ipv6ScopeZoneIndex7                  InetZoneIndex,
        ipv6ScopeZoneIndexOrganizationLocal  InetZoneIndex,
        ipv6ScopeZoneIndex9                  InetZoneIndex,
        ipv6ScopeZoneIndexA                  InetZoneIndex,
        ipv6ScopeZoneIndexB                  InetZoneIndex,
        ipv6ScopeZoneIndexC                  InetZoneIndex,
        ipv6ScopeZoneIndexD                  InetZoneIndex
    }

ipv6ScopeZoneIndexIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface to
            which these scopes belong.  The interface identified by a
            particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipv6ScopeZoneIndexEntry 1 }

ipv6ScopeZoneIndexLinkLocal OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for the link-local scope on this interface."
    ::= { ipv6ScopeZoneIndexEntry 2 }

ipv6ScopeZoneIndex3 OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION

           "The zone index for scope 3 on this interface."
    ::= { ipv6ScopeZoneIndexEntry 3 }

ipv6ScopeZoneIndexAdminLocal OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for the admin-local scope on this interface."
    ::= { ipv6ScopeZoneIndexEntry 4 }

ipv6ScopeZoneIndexSiteLocal OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for the site-local scope on this interface."
    ::= { ipv6ScopeZoneIndexEntry 5 }

ipv6ScopeZoneIndex6 OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for scope 6 on this interface."
    ::= { ipv6ScopeZoneIndexEntry 6 }

ipv6ScopeZoneIndex7 OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for scope 7 on this interface."
    ::= { ipv6ScopeZoneIndexEntry 7 }

ipv6ScopeZoneIndexOrganizationLocal OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for the organization-local scope on this
            interface."
    ::= { ipv6ScopeZoneIndexEntry 8 }

ipv6ScopeZoneIndex9 OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current

    DESCRIPTION
           "The zone index for scope 9 on this interface."
    ::= { ipv6ScopeZoneIndexEntry 9 }

ipv6ScopeZoneIndexA OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for scope A on this interface."
    ::= { ipv6ScopeZoneIndexEntry 10 }

ipv6ScopeZoneIndexB OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for scope B on this interface."
    ::= { ipv6ScopeZoneIndexEntry 11 }

ipv6ScopeZoneIndexC OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for scope C on this interface."
    ::= { ipv6ScopeZoneIndexEntry 12 }

ipv6ScopeZoneIndexD OBJECT-TYPE
    SYNTAX     InetZoneIndex
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The zone index for scope D on this interface."
    ::= { ipv6ScopeZoneIndexEntry 13 }

--
-- The Default Router Table
-- This table simply lists the default routers; for more information
-- about routing tables, see the routing MIBs
--

ipDefaultRouterTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpDefaultRouterEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table used to describe the default routers known to this

            entity."
    ::= { ip 37 }

ipDefaultRouterEntry OBJECT-TYPE
    SYNTAX     IpDefaultRouterEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "Each entry contains information about a default router known
            to this entity."
    INDEX {ipDefaultRouterAddressType, ipDefaultRouterAddress,
           ipDefaultRouterIfIndex}
    ::= { ipDefaultRouterTable 1 }

IpDefaultRouterEntry ::= SEQUENCE {
        ipDefaultRouterAddressType  InetAddressType,
        ipDefaultRouterAddress      InetAddress,
        ipDefaultRouterIfIndex      InterfaceIndex,
        ipDefaultRouterLifetime     Unsigned32,
        ipDefaultRouterPreference   INTEGER
    }

ipDefaultRouterAddressType OBJECT-TYPE
    SYNTAX     InetAddressType
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The address type for this row."
    ::= { ipDefaultRouterEntry 1 }

ipDefaultRouterAddress OBJECT-TYPE
    SYNTAX     InetAddress
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP address of the default router represented by this
            row.  The address type of this object is specified in
            ipDefaultRouterAddressType.

            Implementers need to be aware that if the size of
            ipDefaultRouterAddress exceeds 115 octets, then OIDS of
            instances of columns in this row will have more than 128
            sub-identifiers and cannot be accessed using SNMPv1,
            SNMPv2c, or SNMPv3."
    ::= { ipDefaultRouterEntry 2 }

ipDefaultRouterIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex

    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface by
            which the router can be reached.  The interface identified
            by a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipDefaultRouterEntry 3 }

ipDefaultRouterLifetime OBJECT-TYPE
    SYNTAX     Unsigned32 (0..65535)
    UNITS      "seconds"
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The remaining length of time, in seconds, that this router
            will continue to be useful as a default router.  A value of
            zero indicates that it is no longer useful as a default
            router.  It is left to the implementer of the MIB as to
            whether a router with a lifetime of zero is removed from the
            list.

            For IPv6, this value should be extracted from the router
            advertisement messages."
    REFERENCE "For IPv6 RFC 2462 sections 4.2 and 6.3.4"
    ::= { ipDefaultRouterEntry 4 }

ipDefaultRouterPreference OBJECT-TYPE
    SYNTAX     INTEGER {
                     reserved (-2),
                     low (-1),
                     medium (0),
                     high (1)
                    }
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "An indication of preference given to this router as a
            default router as described in he Default Router
            Preferences document.  Treating the value as a
            2 bit signed integer allows for simple arithmetic
            comparisons.

            For IPv4 routers or IPv6 routers that are not using the
            updated router advertisement format, this object is set to
            medium (0)."
    REFERENCE "RFC 4291, section 2.1"
    ::= { ipDefaultRouterEntry 5 }

--
-- Configuration information for constructing router advertisements
--

ipv6RouterAdvertSpinLock OBJECT-TYPE
    SYNTAX     TestAndIncr
    MAX-ACCESS read-write
    STATUS     current
    DESCRIPTION
           "An advisory lock used to allow cooperating SNMP managers to
            coordinate their use of the set operation in creating or
            modifying rows within this table.

            In order to use this lock to coordinate the use of set
            operations, managers should first retrieve
            ipv6RouterAdvertSpinLock.  They should then determine the
            appropriate row to create or modify.  Finally, they should
            issue the appropriate set command including the retrieved
            value of ipv6RouterAdvertSpinLock.  If another manager has
            altered the table in the meantime, then the value of
            ipv6RouterAdvertSpinLock will have changed and the creation
            will fail as it will be specifying an incorrect value for
            ipv6RouterAdvertSpinLock.  It is suggested, but not
            required, that the ipv6RouterAdvertSpinLock be the first var
            bind for each set of objects representing a 'row' in a PDU."
    ::= { ip 38 }

ipv6RouterAdvertTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF Ipv6RouterAdvertEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table containing information used to construct router
            advertisements."
    ::= { ip 39 }

ipv6RouterAdvertEntry OBJECT-TYPE
    SYNTAX     Ipv6RouterAdvertEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "An entry containing information used to construct router
            advertisements.

            Information in this table is persistent, and when this
            object is written, the entity SHOULD save the change to
            non-volatile storage."
    INDEX { ipv6RouterAdvertIfIndex }

    ::= { ipv6RouterAdvertTable 1 }

Ipv6RouterAdvertEntry ::= SEQUENCE {
        ipv6RouterAdvertIfIndex          InterfaceIndex,
        ipv6RouterAdvertSendAdverts      TruthValue,
        ipv6RouterAdvertMaxInterval      Unsigned32,
        ipv6RouterAdvertMinInterval      Unsigned32,
        ipv6RouterAdvertManagedFlag      TruthValue,
        ipv6RouterAdvertOtherConfigFlag  TruthValue,
        ipv6RouterAdvertLinkMTU          Unsigned32,
        ipv6RouterAdvertReachableTime    Unsigned32,
        ipv6RouterAdvertRetransmitTime   Unsigned32,
        ipv6RouterAdvertCurHopLimit      Unsigned32,
        ipv6RouterAdvertDefaultLifetime  Unsigned32,
        ipv6RouterAdvertRowStatus        RowStatus
    }

ipv6RouterAdvertIfIndex OBJECT-TYPE
    SYNTAX     InterfaceIndex
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The index value that uniquely identifies the interface on
            which router advertisements constructed with this
            information will be transmitted.  The interface identified
            by a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipv6RouterAdvertEntry 1 }

ipv6RouterAdvertSendAdverts OBJECT-TYPE
    SYNTAX     TruthValue
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "A flag indicating whether the router sends periodic
            router advertisements and responds to router solicitations
            on this interface."
    REFERENCE "RFC 2461 Section 6.2.1"
    DEFVAL { false }
    ::= { ipv6RouterAdvertEntry 2 }

ipv6RouterAdvertMaxInterval OBJECT-TYPE
    SYNTAX     Unsigned32 (4..1800)
    UNITS      "seconds"
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The maximum time allowed between sending unsolicited router

            advertisements from this interface."
    REFERENCE "RFC 2461 Section 6.2.1"
    DEFVAL { 600 }
    ::= { ipv6RouterAdvertEntry 3 }

ipv6RouterAdvertMinInterval OBJECT-TYPE
    SYNTAX     Unsigned32 (3..1350)
    UNITS      "seconds"
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The minimum time allowed between sending unsolicited router
            advertisements from this interface.

            The default is 0.33 * ipv6RouterAdvertMaxInterval, however,
            in the case of a low value for ipv6RouterAdvertMaxInterval,
            the minimum value for this object is restricted to 3."
    REFERENCE "RFC 2461 Section 6.2.1"
    ::= { ipv6RouterAdvertEntry 4 }

ipv6RouterAdvertManagedFlag OBJECT-TYPE
    SYNTAX     TruthValue
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The true/false value to be placed into the 'managed address
            configuration' flag field in router advertisements sent from
            this interface."
    REFERENCE "RFC 2461 Section 6.2.1"
    DEFVAL { false }
    ::= { ipv6RouterAdvertEntry 5 }

ipv6RouterAdvertOtherConfigFlag OBJECT-TYPE
    SYNTAX     TruthValue
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The true/false value to be placed into the 'other stateful
            configuration' flag field in router advertisements sent from
            this interface."
    REFERENCE "RFC 2461 Section 6.2.1"
    DEFVAL { false }
    ::= { ipv6RouterAdvertEntry 6 }

ipv6RouterAdvertLinkMTU OBJECT-TYPE
    SYNTAX     Unsigned32
    MAX-ACCESS read-create
    STATUS     current

    DESCRIPTION
           "The value to be placed in MTU options sent by the router on
            this interface.

            A value of zero indicates that no MTU options are sent."
    REFERENCE "RFC 2461 Section 6.2.1"
    DEFVAL { 0 }
    ::= { ipv6RouterAdvertEntry 7 }

ipv6RouterAdvertReachableTime OBJECT-TYPE
    SYNTAX     Unsigned32 (0..3600000)
    UNITS      "milliseconds"
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The value to be placed in the reachable time field in router
            advertisement messages sent from this interface.

            A value of zero in the router advertisement indicates that
            the advertisement isn't specifying a value for reachable
            time."
    REFERENCE "RFC 2461 Section 6.2.1"
    DEFVAL { 0 }
    ::= { ipv6RouterAdvertEntry 8 }

ipv6RouterAdvertRetransmitTime OBJECT-TYPE
    SYNTAX     Unsigned32
    UNITS      "milliseconds"
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The value to be placed in the retransmit timer field in
            router advertisements sent from this interface.

            A value of zero in the router advertisement indicates that
            the advertisement isn't specifying a value for retrans
            time."
    REFERENCE "RFC 2461 Section 6.2.1"
    DEFVAL { 0 }
    ::= { ipv6RouterAdvertEntry 9 }

ipv6RouterAdvertCurHopLimit OBJECT-TYPE
    SYNTAX     Unsigned32 (0..255)
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The default value to be placed in the current hop limit
            field in router advertisements sent from this interface.

            The value should be set to the current diameter of the
            Internet.

            A value of zero in the router advertisement indicates that
            the advertisement isn't specifying a value for curHopLimit.

            The default should be set to the value specified in the IANA
            web pages (www.iana.org) at the time of implementation."
    REFERENCE "RFC 2461 Section 6.2.1"
    ::= { ipv6RouterAdvertEntry 10 }

ipv6RouterAdvertDefaultLifetime OBJECT-TYPE
    SYNTAX     Unsigned32 (0|4..9000)
    UNITS      "seconds"
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The value to be placed in the router lifetime field of
            router advertisements sent from this interface.  This value
            MUST be either 0 or between ipv6RouterAdvertMaxInterval and
            9000 seconds.

            A value of zero indicates that the router is not to be used
            as a default router.

            The default is 3 * ipv6RouterAdvertMaxInterval."
    REFERENCE "RFC 2461 Section 6.2.1"
    ::= { ipv6RouterAdvertEntry 11 }

ipv6RouterAdvertRowStatus OBJECT-TYPE
    SYNTAX     RowStatus
    MAX-ACCESS read-create
    STATUS     current
    DESCRIPTION
           "The status of this conceptual row.

            As all objects in this conceptual row have default values, a
            row can be created and made active by setting this object
            appropriately.

            The RowStatus TC requires that this DESCRIPTION clause
            states under which circumstances other objects in this row
            can be modified.  The value of this object has no effect on
            whether other objects in this conceptual row can be
            modified."
    ::= { ipv6RouterAdvertEntry 12 }

--

-- ICMP section
--

icmp     OBJECT IDENTIFIER ::= { mib-2 5 }

--
-- ICMP non-message-specific counters
--

-- These object IDs are reserved, as they were used in earlier
-- versions of the MIB module.  In theory, OIDs are not assigned
-- until the specification is released as an RFC; however, as some
-- companies may have shipped code based on earlier versions of
-- the MIB, it seems best to reserve these OIDs.
-- ::= { icmp 27 }
-- ::= { icmp 28 }

icmpStatsTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IcmpStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table of generic system-wide ICMP counters."
    ::= { icmp 29 }

icmpStatsEntry OBJECT-TYPE
    SYNTAX     IcmpStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "A conceptual row in the icmpStatsTable."
    INDEX    { icmpStatsIPVersion }
    ::= { icmpStatsTable 1 }

IcmpStatsEntry ::= SEQUENCE {
        icmpStatsIPVersion  InetVersion,
        icmpStatsInMsgs     Counter32,
        icmpStatsInErrors   Counter32,
        icmpStatsOutMsgs    Counter32,
        icmpStatsOutErrors  Counter32
    }

icmpStatsIPVersion OBJECT-TYPE
    SYNTAX     InetVersion
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP version of the statistics."

    ::= { icmpStatsEntry 1 }

icmpStatsInMsgs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of ICMP messages that the entity received.
            Note that this counter includes all those counted by
            icmpStatsInErrors."
    ::= { icmpStatsEntry 2 }

icmpStatsInErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of ICMP messages that the entity received but
            determined as having ICMP-specific errors (bad ICMP
            checksums, bad length, etc.)."
    ::= { icmpStatsEntry 3 }

icmpStatsOutMsgs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The total number of ICMP messages that the entity attempted
            to send.  Note that this counter includes all those counted
            by icmpStatsOutErrors."
    ::= { icmpStatsEntry 4 }

icmpStatsOutErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of ICMP messages that this entity did not send
            due to problems discovered within ICMP, such as a lack of
            buffers.  This value should not include errors discovered
            outside the ICMP layer, such as the inability of IP to route
            the resultant datagram.  In some implementations, there may
            be no types of error that contribute to this counter's
            value."
    ::= { icmpStatsEntry 5 }

--
-- per-version, per-message type ICMP counters

--

icmpMsgStatsTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IcmpMsgStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The table of system-wide per-version, per-message type ICMP
            counters."
    ::= { icmp 30 }

icmpMsgStatsEntry OBJECT-TYPE
    SYNTAX     IcmpMsgStatsEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "A conceptual row in the icmpMsgStatsTable.

            The system should track each ICMP type value, even if that
            ICMP type is not supported by the system.  However, a
            given row need not be instantiated unless a message of that
            type has been processed, i.e., the row for
            icmpMsgStatsType=X MAY be instantiated before but MUST be
            instantiated after the first message with Type=X is
            received or transmitted.  After receiving or transmitting
            any succeeding messages with Type=X, the relevant counter
            must be incremented."
    INDEX { icmpMsgStatsIPVersion, icmpMsgStatsType }
    ::= { icmpMsgStatsTable 1 }

IcmpMsgStatsEntry ::= SEQUENCE {
        icmpMsgStatsIPVersion  InetVersion,
        icmpMsgStatsType       Integer32,
        icmpMsgStatsInPkts     Counter32,
        icmpMsgStatsOutPkts    Counter32
    }

icmpMsgStatsIPVersion OBJECT-TYPE
    SYNTAX     InetVersion
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
           "The IP version of the statistics."
    ::= { icmpMsgStatsEntry 1 }

icmpMsgStatsType OBJECT-TYPE
    SYNTAX     Integer32 (0..255)
    MAX-ACCESS not-accessible

    STATUS     current
    DESCRIPTION
           "The ICMP type field of the message type being counted by
            this row.

            Note that ICMP message types are scoped by the address type
            in use."
    REFERENCE "http://www.iana.org/assignments/icmp-parameters and
               http://www.iana.org/assignments/icmpv6-parameters"
    ::= { icmpMsgStatsEntry 2 }

icmpMsgStatsInPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of input packets for this AF and type."
    ::= { icmpMsgStatsEntry 3 }

icmpMsgStatsOutPkts OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
           "The number of output packets for this AF and type."
    ::= { icmpMsgStatsEntry 4 }
--
-- conformance information
--

ipMIBConformance OBJECT IDENTIFIER ::= { ipMIB 2 }

ipMIBCompliances OBJECT IDENTIFIER ::= { ipMIBConformance 1 }
ipMIBGroups      OBJECT IDENTIFIER ::= { ipMIBConformance 2 }

-- compliance statements
ipMIBCompliance2 MODULE-COMPLIANCE
    STATUS     current
    DESCRIPTION
            "The compliance statement for systems that implement IP -
             either IPv4 or IPv6.

            There are a number of INDEX objects that cannot be
            represented in the form of OBJECT clauses in SMIv2, but
            for which we have the following compliance requirements,
            expressed in OBJECT clause form in this description
            clause:

            -- OBJECT        ipSystemStatsIPVersion
            -- SYNTAX        InetVersion {ipv4(1), ipv6(2)}
            -- DESCRIPTION
            --     This MIB requires support for only IPv4 and IPv6
            --     versions.
            --
            -- OBJECT        ipIfStatsIPVersion
            -- SYNTAX        InetVersion {ipv4(1), ipv6(2)}
            -- DESCRIPTION
            --     This MIB requires support for only IPv4 and IPv6
            --     versions.
            --
            -- OBJECT        icmpStatsIPVersion
            -- SYNTAX        InetVersion {ipv4(1), ipv6(2)}
            -- DESCRIPTION
            --     This MIB requires support for only IPv4 and IPv6
            --     versions.
            --
            -- OBJECT        icmpMsgStatsIPVersion
            -- SYNTAX        InetVersion {ipv4(1), ipv6(2)}
            -- DESCRIPTION
            --     This MIB requires support for only IPv4 and IPv6
            --     versions.
            --
            -- OBJECT        ipAddressPrefixType
            -- SYNTAX        InetAddressType {ipv4(1), ipv6(2)}
            -- DESCRIPTION
            --     This MIB requires support for only global IPv4 and
            --     IPv6 address types.
            --
            -- OBJECT        ipAddressPrefixPrefix
            -- SYNTAX        InetAddress (Size(4 | 16))
            -- DESCRIPTION
            --     This MIB requires support for only global IPv4 and
            --     IPv6 addresses and so the size can be either 4 or
            --     16 bytes.
            --
            -- OBJECT        ipAddressAddrType
            -- SYNTAX        InetAddressType {ipv4(1), ipv6(2),
            --                                ipv4z(3), ipv6z(4)}
            -- DESCRIPTION
            --     This MIB requires support for only global and
            --     non-global IPv4 and IPv6 address types.
            --
            -- OBJECT        ipAddressAddr
            -- SYNTAX        InetAddress (Size(4 | 8 | 16 | 20))
            -- DESCRIPTION
            --     This MIB requires support for only global and

            --     non-global IPv4 and IPv6 addresses and so the size
            --     can be 4, 8, 16, or 20 bytes.
            --
            -- OBJECT        ipNetToPhysicalNetAddressType
            -- SYNTAX        InetAddressType {ipv4(1), ipv6(2),
            --                                ipv4z(3), ipv6z(4)}
            -- DESCRIPTION
            --     This MIB requires support for only global and
            --     non-global IPv4 and IPv6 address types.
            --
            -- OBJECT        ipNetToPhysicalNetAddress
            -- SYNTAX        InetAddress (Size(4 | 8 | 16 | 20))
            -- DESCRIPTION
            --     This MIB requires support for only global and
            --     non-global IPv4 and IPv6 addresses and so the size
            --     can be 4, 8, 16, or 20 bytes.
            --
            -- OBJECT        ipDefaultRouterAddressType
            -- SYNTAX        InetAddressType {ipv4(1), ipv6(2),
            --                                ipv4z(3), ipv6z(4)}
            -- DESCRIPTION
            --     This MIB requires support for only global and
            --     non-global IPv4 and IPv6 address types.
            --
            -- OBJECT        ipDefaultRouterAddress
            -- SYNTAX        InetAddress (Size(4 | 8 | 16 | 20))
            -- DESCRIPTION
            --     This MIB requires support for only global and
            --     non-global IPv4 and IPv6 addresses and so the size
            --     can be 4, 8, 16, or 20 bytes."

    MODULE -- this module

    MANDATORY-GROUPS { ipSystemStatsGroup,   ipAddressGroup,
                       ipNetToPhysicalGroup, ipDefaultRouterGroup,
                       icmpStatsGroup }

    GROUP ipSystemStatsHCOctetGroup
    DESCRIPTION
           "This group is mandatory for systems that have an aggregate
            bandwidth of greater than 20MB.  Including this group does
            not allow an entity to neglect the 32 bit versions of these
            objects."

    GROUP ipSystemStatsHCPacketGroup
    DESCRIPTION
           "This group is mandatory for systems that have an aggregate
            bandwidth of greater than 650MB.  Including this group

            does not allow an entity to neglect the 32 bit versions of
            these objects."

    GROUP ipIfStatsGroup
    DESCRIPTION
           "This group is optional for all systems."

    GROUP ipIfStatsHCOctetGroup
    DESCRIPTION
           "This group is mandatory for systems that include the
            ipIfStatsGroup and include links with bandwidths of greater
            than 20MB.  Including this group does not allow an entity to
            neglect the 32 bit versions of these objects."

    GROUP ipIfStatsHCPacketGroup
    DESCRIPTION
           "This group is mandatory for systems that include the
            ipIfStatsGroup and include links with bandwidths of greater
            than 650MB.  Including this group does not allow an entity
            to neglect the 32 bit versions of these objects."

    GROUP ipv4GeneralGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv4."

    GROUP ipv4IfGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv4."

    GROUP ipv4SystemStatsGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv4."

    GROUP ipv4SystemStatsHCPacketGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv4 and
            that have an aggregate bandwidth of greater than 650MB.
            Including this group does not allow an entity to neglect the
            32 bit versions of these objects."

    GROUP ipv4IfStatsGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv4 and
            including the ipIfStatsGroup."

    GROUP ipv4IfStatsHCPacketGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv4 and

            including the ipIfStatsHCPacketGroup.  Including this group
            does not allow an entity to neglect the 32 bit versions of
            these objects."

    GROUP ipv6GeneralGroup2
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv6."

    GROUP ipv6IfGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv6."

    GROUP ipAddressPrefixGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv6."

    GROUP ipv6ScopeGroup
    DESCRIPTION
           "This group is mandatory for all systems supporting IPv6."

    GROUP ipv6RouterAdvertGroup
    DESCRIPTION
           "This group is mandatory for all IPv6 routers."

    GROUP ipLastChangeGroup
    DESCRIPTION
           "This group is optional for all agents."

    OBJECT     ipv6IpForwarding
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6IpDefaultHopLimit
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv4InterfaceEnableStatus
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6InterfaceEnableStatus
    MIN-ACCESS read-only

    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6InterfaceForwarding
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipAddressSpinLock
    MIN-ACCESS not-accessible
    DESCRIPTION
           "An agent is not required to provide write access to this
            object.  However, if an agent provides write access to any
            of the other objects in the ipAddressGroup, it SHOULD
            provide write access to this object as well."

    OBJECT     ipAddressIfIndex
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object."

    OBJECT     ipAddressType
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object."

    OBJECT     ipAddressStatus
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object."

    OBJECT     ipAddressRowStatus
    SYNTAX     RowStatus { active(1) }
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object."

    OBJECT     ipAddressStorageType
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object.

            If an agent allows this object to be written or created, it
            is not required to allow this object to be set to readOnly,
            permanent, or nonVolatile."

    OBJECT     ipNetToPhysicalPhysAddress
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object."

    OBJECT     ipNetToPhysicalType
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object."

    OBJECT     ipv6RouterAdvertSpinLock
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object.  However, if an agent provides write access to
            any of the other objects in the ipv6RouterAdvertGroup, it
            SHOULD provide write access to this object as well."

    OBJECT     ipv6RouterAdvertSendAdverts
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertMaxInterval
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertMinInterval
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertManagedFlag
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertOtherConfigFlag
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertLinkMTU
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertReachableTime
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertRetransmitTime
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertCurHopLimit
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertDefaultLifetime
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write access to this
            object."

    OBJECT     ipv6RouterAdvertRowStatus
    MIN-ACCESS read-only
    DESCRIPTION
           "An agent is not required to provide write or create access
            to this object."

    ::= { ipMIBCompliances 2 }

-- units of conformance

ipv4GeneralGroup OBJECT-GROUP
    OBJECTS   { ipForwarding, ipDefaultTTL, ipReasmTimeout }

    STATUS     current
    DESCRIPTION
           "The group of IPv4-specific objects for basic management of
            IPv4 entities."
    ::= { ipMIBGroups 3 }

ipv4IfGroup OBJECT-GROUP
    OBJECTS   { ipv4InterfaceReasmMaxSize, ipv4InterfaceEnableStatus,
                ipv4InterfaceRetransmitTime }
    STATUS     current
    DESCRIPTION
           "The group of IPv4-specific objects for basic management of
            IPv4 interfaces."
    ::= { ipMIBGroups 4 }

ipv6GeneralGroup2 OBJECT-GROUP
    OBJECTS { ipv6IpForwarding, ipv6IpDefaultHopLimit }
    STATUS     current
    DESCRIPTION
           "The IPv6 group of objects providing for basic management of
            IPv6 entities."
    ::= { ipMIBGroups 5 }

ipv6IfGroup OBJECT-GROUP
    OBJECTS   { ipv6InterfaceReasmMaxSize,   ipv6InterfaceIdentifier,
                ipv6InterfaceEnableStatus,   ipv6InterfaceReachableTime,
                ipv6InterfaceRetransmitTime, ipv6InterfaceForwarding }
    STATUS     current
    DESCRIPTION
           "The group of IPv6-specific objects for basic management of
            IPv6 interfaces."
    ::= { ipMIBGroups 6 }

ipLastChangeGroup OBJECT-GROUP
    OBJECTS   { ipv4InterfaceTableLastChange,
                ipv6InterfaceTableLastChange,
                ipIfStatsTableLastChange }
    STATUS     current
    DESCRIPTION
           "The last change objects associated with this MIB.  These
            objects are optional for all agents.  They SHOULD be
            implemented on agents where it is possible to determine the
            proper values.  Where it is not possible to determine the
            proper values, for example when the tables are split amongst
            several sub-agents using AgentX, the agent MUST NOT
            implement these objects to return an incorrect or static
            value."
    ::= { ipMIBGroups 7 }

ipSystemStatsGroup OBJECT-GROUP
    OBJECTS   { ipSystemStatsInReceives,
                ipSystemStatsInOctets,
                ipSystemStatsInHdrErrors,
                ipSystemStatsInNoRoutes,
                ipSystemStatsInAddrErrors,
                ipSystemStatsInUnknownProtos,
                ipSystemStatsInTruncatedPkts,
                ipSystemStatsInForwDatagrams,
                ipSystemStatsReasmReqds,
                ipSystemStatsReasmOKs,
                ipSystemStatsReasmFails,
                ipSystemStatsInDiscards,
                ipSystemStatsInDelivers,
                ipSystemStatsOutRequests,
                ipSystemStatsOutNoRoutes,
                ipSystemStatsOutForwDatagrams,
                ipSystemStatsOutDiscards,
                ipSystemStatsOutFragReqds,
                ipSystemStatsOutFragOKs,
                ipSystemStatsOutFragFails,
                ipSystemStatsOutFragCreates,
                ipSystemStatsOutTransmits,
                ipSystemStatsOutOctets,
                ipSystemStatsInMcastPkts,
                ipSystemStatsInMcastOctets,
                ipSystemStatsOutMcastPkts,
                ipSystemStatsOutMcastOctets,
                ipSystemStatsDiscontinuityTime,
                ipSystemStatsRefreshRate }
    STATUS     current
    DESCRIPTION
           "IP system wide statistics."
    ::= { ipMIBGroups 8 }

ipv4SystemStatsGroup OBJECT-GROUP
    OBJECTS   { ipSystemStatsInBcastPkts, ipSystemStatsOutBcastPkts }
    STATUS     current
    DESCRIPTION
           "IPv4 only system wide statistics."
    ::= { ipMIBGroups 9 }

ipSystemStatsHCOctetGroup OBJECT-GROUP
    OBJECTS   { ipSystemStatsHCInOctets,
                ipSystemStatsHCOutOctets,
                ipSystemStatsHCInMcastOctets,
                ipSystemStatsHCOutMcastOctets
}

    STATUS     current
    DESCRIPTION
           "IP system wide statistics for systems that may overflow the
            standard octet counters within 1 hour."
    ::= { ipMIBGroups 10 }

ipSystemStatsHCPacketGroup OBJECT-GROUP
    OBJECTS   { ipSystemStatsHCInReceives,
                ipSystemStatsHCInForwDatagrams,
                ipSystemStatsHCInDelivers,
                ipSystemStatsHCOutRequests,
                ipSystemStatsHCOutForwDatagrams,
                ipSystemStatsHCOutTransmits,
                ipSystemStatsHCInMcastPkts,
                ipSystemStatsHCOutMcastPkts
}
    STATUS     current
    DESCRIPTION
           "IP system wide statistics for systems that may overflow the
            standard packet counters within 1 hour."
    ::= { ipMIBGroups 11 }

ipv4SystemStatsHCPacketGroup OBJECT-GROUP
    OBJECTS   { ipSystemStatsHCInBcastPkts,
                ipSystemStatsHCOutBcastPkts }
    STATUS     current
    DESCRIPTION
           "IPv4 only system wide statistics for systems that may
            overflow the standard packet counters within 1 hour."
    ::= { ipMIBGroups 12 }

ipIfStatsGroup OBJECT-GROUP
    OBJECTS   { ipIfStatsInReceives,        ipIfStatsInOctets,
                ipIfStatsInHdrErrors,       ipIfStatsInNoRoutes,
                ipIfStatsInAddrErrors,      ipIfStatsInUnknownProtos,
                ipIfStatsInTruncatedPkts,   ipIfStatsInForwDatagrams,
                ipIfStatsReasmReqds,        ipIfStatsReasmOKs,
                ipIfStatsReasmFails,        ipIfStatsInDiscards,
                ipIfStatsInDelivers,        ipIfStatsOutRequests,
                ipIfStatsOutForwDatagrams,  ipIfStatsOutDiscards,
                ipIfStatsOutFragReqds,      ipIfStatsOutFragOKs,
                ipIfStatsOutFragFails,      ipIfStatsOutFragCreates,
                ipIfStatsOutTransmits,      ipIfStatsOutOctets,
                ipIfStatsInMcastPkts,       ipIfStatsInMcastOctets,
                ipIfStatsOutMcastPkts,      ipIfStatsOutMcastOctets,
                ipIfStatsDiscontinuityTime, ipIfStatsRefreshRate }
    STATUS     current
    DESCRIPTION

           "IP per-interface statistics."
    ::= { ipMIBGroups 13 }

ipv4IfStatsGroup OBJECT-GROUP
    OBJECTS   { ipIfStatsInBcastPkts, ipIfStatsOutBcastPkts }
    STATUS     current
    DESCRIPTION
           "IPv4 only per-interface statistics."
    ::= { ipMIBGroups 14 }

ipIfStatsHCOctetGroup OBJECT-GROUP
    OBJECTS   { ipIfStatsHCInOctets,      ipIfStatsHCOutOctets,
                ipIfStatsHCInMcastOctets, ipIfStatsHCOutMcastOctets }
    STATUS     current
    DESCRIPTION
           "IP per-interfaces statistics for systems that include
            interfaces that may overflow the standard octet
            counters within 1 hour."
    ::= { ipMIBGroups 15 }

ipIfStatsHCPacketGroup OBJECT-GROUP
    OBJECTS   { ipIfStatsHCInReceives,       ipIfStatsHCInForwDatagrams,
                ipIfStatsHCInDelivers,       ipIfStatsHCOutRequests,
                ipIfStatsHCOutForwDatagrams, ipIfStatsHCOutTransmits,
                ipIfStatsHCInMcastPkts,      ipIfStatsHCOutMcastPkts }
    STATUS     current
    DESCRIPTION
           "IP per-interfaces statistics for systems that include
            interfaces that may overflow the standard packet counters
            within 1 hour."
    ::= { ipMIBGroups 16 }

ipv4IfStatsHCPacketGroup OBJECT-GROUP
    OBJECTS   { ipIfStatsHCInBcastPkts, ipIfStatsHCOutBcastPkts }
    STATUS     current
    DESCRIPTION
           "IPv4 only per-interface statistics for systems that include
            interfaces that may overflow the standard packet counters
            within 1 hour."
    ::= { ipMIBGroups 17 }

ipAddressPrefixGroup OBJECT-GROUP
    OBJECTS   { ipAddressPrefixOrigin,
                ipAddressPrefixOnLinkFlag,
                ipAddressPrefixAutonomousFlag,
                ipAddressPrefixAdvPreferredLifetime,
                ipAddressPrefixAdvValidLifetime }
    STATUS     current

    DESCRIPTION
           "The group of objects for providing information about address
            prefixes used by this node."
    ::= { ipMIBGroups 18 }

ipAddressGroup OBJECT-GROUP
    OBJECTS   { ipAddressSpinLock,  ipAddressIfIndex,
                ipAddressType,      ipAddressPrefix,
                ipAddressOrigin,    ipAddressStatus,
                ipAddressCreated,   ipAddressLastChanged,
                ipAddressRowStatus, ipAddressStorageType }
    STATUS     current
    DESCRIPTION
           "The group of objects for providing information about the
            addresses relevant to this entity's interfaces."
    ::= { ipMIBGroups 19 }

ipNetToPhysicalGroup OBJECT-GROUP
    OBJECTS   { ipNetToPhysicalPhysAddress, ipNetToPhysicalLastUpdated,
                ipNetToPhysicalType,        ipNetToPhysicalState,
                ipNetToPhysicalRowStatus }
    STATUS     current
    DESCRIPTION
           "The group of objects for providing information about the
            mappings of network address to physical address known to
            this node."
    ::= { ipMIBGroups 20 }

ipv6ScopeGroup OBJECT-GROUP
    OBJECTS   { ipv6ScopeZoneIndexLinkLocal,
                ipv6ScopeZoneIndex3,
                ipv6ScopeZoneIndexAdminLocal,
                ipv6ScopeZoneIndexSiteLocal,
                ipv6ScopeZoneIndex6,
                ipv6ScopeZoneIndex7,
                ipv6ScopeZoneIndexOrganizationLocal,
                ipv6ScopeZoneIndex9,
                ipv6ScopeZoneIndexA,
                ipv6ScopeZoneIndexB,
                ipv6ScopeZoneIndexC,
                ipv6ScopeZoneIndexD }
    STATUS     current
    DESCRIPTION
           "The group of objects for managing IPv6 scope zones."
    ::= { ipMIBGroups 21 }

ipDefaultRouterGroup OBJECT-GROUP
    OBJECTS   { ipDefaultRouterLifetime, ipDefaultRouterPreference }

    STATUS     current
    DESCRIPTION
           "The group of objects for providing information about default
            routers known to this node."
    ::= { ipMIBGroups 22 }

ipv6RouterAdvertGroup OBJECT-GROUP
    OBJECTS   { ipv6RouterAdvertSpinLock,
                ipv6RouterAdvertSendAdverts,
                ipv6RouterAdvertMaxInterval,
                ipv6RouterAdvertMinInterval,
                ipv6RouterAdvertManagedFlag,
                ipv6RouterAdvertOtherConfigFlag,
                ipv6RouterAdvertLinkMTU,
                ipv6RouterAdvertReachableTime,
                ipv6RouterAdvertRetransmitTime,
                ipv6RouterAdvertCurHopLimit,
                ipv6RouterAdvertDefaultLifetime,
                ipv6RouterAdvertRowStatus
}
    STATUS     current
    DESCRIPTION
           "The group of objects for controlling information advertised
            by IPv6 routers."
    ::= { ipMIBGroups 23 }

icmpStatsGroup OBJECT-GROUP
    OBJECTS   {icmpStatsInMsgs,    icmpStatsInErrors,
               icmpStatsOutMsgs,   icmpStatsOutErrors,
               icmpMsgStatsInPkts, icmpMsgStatsOutPkts }
    STATUS     current
    DESCRIPTION
           "The group of objects providing ICMP statistics."
    ::= { ipMIBGroups 24 }

--
-- Deprecated objects
--

ipInReceives OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The total number of input datagrams received from
            interfaces, including those received in error.

            This object has been deprecated, as a new IP version-neutral

            table has been added.  It is loosely replaced by
            ipSystemStatsInRecieves."
    ::= { ip 3 }

ipInHdrErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of input datagrams discarded due to errors in
            their IPv4 headers, including bad checksums, version number
            mismatch, other format errors, time-to-live exceeded, errors
            discovered in processing their IPv4 options, etc.

            This object has been deprecated as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsInHdrErrors."
    ::= { ip 4 }

ipInAddrErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of input datagrams discarded because the IPv4
            address in their IPv4 header's destination field was not a
            valid address to be received at this entity.  This count
            includes invalid addresses (e.g., 0.0.0.0) and addresses of
            unsupported Classes (e.g., Class E).  For entities which are
            not IPv4 routers, and therefore do not forward datagrams,
            this counter includes datagrams discarded because the
            destination address was not a local address.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsInAddrErrors."
    ::= { ip 5 }

ipForwDatagrams OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of input datagrams for which this entity was not
            their final IPv4 destination, as a result of which an
            attempt was made to find a route to forward them to that
            final destination.  In entities which do not act as IPv4
            routers, this counter will include only those packets which

            were Source-Routed via this entity, and the Source-Route
            option processing was successful.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsInForwDatagrams."
    ::= { ip 6 }

ipInUnknownProtos OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of locally-addressed datagrams received
            successfully but discarded because of an unknown or
            unsupported protocol.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsInUnknownProtos."
    ::= { ip 7 }

ipInDiscards OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of input IPv4 datagrams for which no problems
            were encountered to prevent their continued processing, but
            which were discarded (e.g., for lack of buffer space).  Note
            that this counter does not include any datagrams discarded
            while awaiting re-assembly.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsInDiscards."
    ::= { ip 8 }

ipInDelivers OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The total number of input datagrams successfully delivered
            to IPv4 user-protocols (including ICMP).

            This object has been deprecated as a new IP version neutral
            table has been added.  It is loosely replaced by

            ipSystemStatsIndelivers."
    ::= { ip 9 }

ipOutRequests OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The total number of IPv4 datagrams which local IPv4 user
            protocols (including ICMP) supplied to IPv4 in requests for
            transmission.  Note that this counter does not include any
            datagrams counted in ipForwDatagrams.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsOutRequests."
    ::= { ip 10 }

ipOutDiscards OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of output IPv4 datagrams for which no problem was
            encountered to prevent their transmission to their
            destination, but which were discarded (e.g., for lack of
            buffer space).  Note that this counter would include
            datagrams counted in ipForwDatagrams if any such packets met
            this (discretionary) discard criterion.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsOutDiscards."
    ::= { ip 11 }

ipOutNoRoutes OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of IPv4 datagrams discarded because no route
            could be found to transmit them to their destination.  Note
            that this counter includes any packets counted in
            ipForwDatagrams which meet this `no-route' criterion.  Note
            that this includes any datagrams which a host cannot route
            because all of its default routers are down.

            This object has been deprecated, as a new IP version-neutral

            table has been added.  It is loosely replaced by
            ipSystemStatsOutNoRoutes."
    ::= { ip 12 }

ipReasmReqds OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of IPv4 fragments received which needed to be
            reassembled at this entity.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsReasmReqds."
    ::= { ip 14 }

ipReasmOKs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of IPv4 datagrams successfully re-assembled.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsReasmOKs."
    ::= { ip 15 }

ipReasmFails OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of failures detected by the IPv4 re-assembly
            algorithm (for whatever reason: timed out, errors, etc).
            Note that this is not necessarily a count of discarded IPv4
            fragments since some algorithms (notably the algorithm in
            RFC 815) can lose track of the number of fragments by
            combining them as they are received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsReasmFails."
    ::= { ip 16 }

ipFragOKs OBJECT-TYPE
    SYNTAX     Counter32

    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of IPv4 datagrams that have been successfully
            fragmented at this entity.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsOutFragOKs."
    ::= { ip 17 }

ipFragFails OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of IPv4 datagrams that have been discarded
            because they needed to be fragmented at this entity but
            could not be, e.g., because their Don't Fragment flag was
            set.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsOutFragFails."
    ::= { ip 18 }

ipFragCreates OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of IPv4 datagram fragments that have been
            generated as a result of fragmentation at this entity.

            This object has been deprecated as a new IP version neutral
            table has been added.  It is loosely replaced by
            ipSystemStatsOutFragCreates."
    ::= { ip 19 }

ipRoutingDiscards OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of routing entries which were chosen to be
            discarded even though they are valid.  One possible reason
            for discarding such an entry could be to free-up buffer
            space for other routing entries.

            This object was defined in pre-IPv6 versions of the IP MIB.
            It was implicitly IPv4 only, but the original specifications
            did not indicate this protocol restriction.  In order to
            clarify the specifications, this object has been deprecated
            and a similar, but more thoroughly clarified, object has
            been added to the IP-FORWARD-MIB."
    ::= { ip 23 }

-- the deprecated IPv4 address table

ipAddrTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpAddrEntry
    MAX-ACCESS not-accessible
    STATUS     deprecated
    DESCRIPTION
           "The table of addressing information relevant to this
            entity's IPv4 addresses.

            This table has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by the
            ipAddressTable although several objects that weren't deemed
            useful weren't carried forward while another
            (ipAdEntReasmMaxSize) was moved to the ipv4InterfaceTable."
    ::= { ip 20 }

ipAddrEntry OBJECT-TYPE
    SYNTAX     IpAddrEntry
    MAX-ACCESS not-accessible
    STATUS     deprecated
    DESCRIPTION
           "The addressing information for one of this entity's IPv4
            addresses."
    INDEX      { ipAdEntAddr }
    ::= { ipAddrTable 1 }

IpAddrEntry ::= SEQUENCE {
        ipAdEntAddr          IpAddress,
        ipAdEntIfIndex       INTEGER,
        ipAdEntNetMask       IpAddress,
        ipAdEntBcastAddr     INTEGER,
        ipAdEntReasmMaxSize  INTEGER
    }

ipAdEntAddr OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION

           "The IPv4 address to which this entry's addressing
            information pertains."
    ::= { ipAddrEntry 1 }

ipAdEntIfIndex OBJECT-TYPE
    SYNTAX     INTEGER (1..2147483647)
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The index value which uniquely identifies the interface to
            which this entry is applicable.  The interface identified by
            a particular value of this index is the same interface as
            identified by the same value of the IF-MIB's ifIndex."
    ::= { ipAddrEntry 2 }

ipAdEntNetMask OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The subnet mask associated with the IPv4 address of this
            entry.  The value of the mask is an IPv4 address with all
            the network bits set to 1 and all the hosts bits set to 0."
    ::= { ipAddrEntry 3 }

ipAdEntBcastAddr OBJECT-TYPE
    SYNTAX     INTEGER (0..1)
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The value of the least-significant bit in the IPv4 broadcast
            address used for sending datagrams on the (logical)
            interface associated with the IPv4 address of this entry.
            For example, when the Internet standard all-ones broadcast
            address is used, the value will be 1.  This value applies to
            both the subnet and network broadcast addresses used by the
            entity on this (logical) interface."
    ::= { ipAddrEntry 4 }

ipAdEntReasmMaxSize OBJECT-TYPE
    SYNTAX     INTEGER (0..65535)
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The size of the largest IPv4 datagram which this entity can
            re-assemble from incoming IPv4 fragmented datagrams received
            on this interface."
    ::= { ipAddrEntry 5 }

-- the deprecated IPv4 Address Translation table

-- The Address Translation tables contain the IpAddress to
-- "physical" address equivalences.  Some interfaces do not
-- use translation tables for determining address
-- equivalences (e.g., DDN-X.25 has an algorithmic method);
-- if all interfaces are of this type, then the Address
-- Translation table is empty, i.e., has zero entries.

ipNetToMediaTable OBJECT-TYPE
    SYNTAX     SEQUENCE OF IpNetToMediaEntry
    MAX-ACCESS not-accessible
    STATUS     deprecated
    DESCRIPTION
           "The IPv4 Address Translation table used for mapping from
            IPv4 addresses to physical addresses.

            This table has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by the
            ipNetToPhysicalTable."
    ::= { ip 22 }

ipNetToMediaEntry OBJECT-TYPE
    SYNTAX     IpNetToMediaEntry
    MAX-ACCESS not-accessible
    STATUS     deprecated
    DESCRIPTION
           "Each entry contains one IpAddress to `physical' address
            equivalence."
    INDEX       { ipNetToMediaIfIndex,
                  ipNetToMediaNetAddress }
    ::= { ipNetToMediaTable 1 }

IpNetToMediaEntry ::= SEQUENCE {
        ipNetToMediaIfIndex      INTEGER,
        ipNetToMediaPhysAddress  PhysAddress,
        ipNetToMediaNetAddress   IpAddress,
        ipNetToMediaType         INTEGER
    }

ipNetToMediaIfIndex OBJECT-TYPE
    SYNTAX     INTEGER (1..2147483647)
    MAX-ACCESS read-create
    STATUS     deprecated
    DESCRIPTION
           "The interface on which this entry's equivalence is
            effective.  The interface identified by a particular value
            of this index is the same interface as identified by the

            same value of the IF-MIB's ifIndex.

            This object predates the rule limiting index objects to a
            max access value of 'not-accessible' and so continues to use
            a value of 'read-create'."
    ::= { ipNetToMediaEntry 1 }

ipNetToMediaPhysAddress OBJECT-TYPE
    SYNTAX     PhysAddress (SIZE(0..65535))
    MAX-ACCESS read-create
    STATUS     deprecated
    DESCRIPTION
           "The media-dependent `physical' address.  This object should
            return 0 when this entry is in the 'incomplete' state.

            As the entries in this table are typically not persistent
            when this object is written the entity should not save the
            change to non-volatile storage.  Note: a stronger
            requirement is not used because this object was previously
            defined."
    ::= { ipNetToMediaEntry 2 }

ipNetToMediaNetAddress OBJECT-TYPE
    SYNTAX     IpAddress
    MAX-ACCESS read-create
    STATUS     deprecated
    DESCRIPTION
           "The IpAddress corresponding to the media-dependent
            `physical' address.

            This object predates the rule limiting index objects to a
            max access value of 'not-accessible' and so continues to use
            a value of 'read-create'."
    ::= { ipNetToMediaEntry 3 }

ipNetToMediaType OBJECT-TYPE
    SYNTAX     INTEGER {
                other(1),        -- none of the following
                invalid(2),      -- an invalidated mapping
                dynamic(3),
                static(4)
            }
    MAX-ACCESS read-create
    STATUS     deprecated
    DESCRIPTION
           "The type of mapping.

            Setting this object to the value invalid(2) has the effect

            of invalidating the corresponding entry in the
            ipNetToMediaTable.  That is, it effectively dis-associates
            the interface identified with said entry from the mapping
            identified with said entry.  It is an implementation-
            specific matter as to whether the agent removes an
            invalidated entry from the table.  Accordingly, management
            stations must be prepared to receive tabular information
            from agents that corresponds to entries not currently in
            use.  Proper interpretation of such entries requires
            examination of the relevant ipNetToMediaType object.

            As the entries in this table are typically not persistent
            when this object is written the entity should not save the
            change to non-volatile storage.  Note: a stronger
            requirement is not used because this object was previously
            defined."
    ::= { ipNetToMediaEntry 4 }

-- the deprecated ICMP group

icmpInMsgs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The total number of ICMP messages which the entity received.
            Note that this counter includes all those counted by
            icmpInErrors.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            icmpStatsInMsgs."
    ::= { icmp 1 }

icmpInErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP messages which the entity received but
            determined as having ICMP-specific errors (bad ICMP
            checksums, bad length, etc.).

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            icmpStatsInErrors."
    ::= { icmp 2 }

icmpInDestUnreachs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Destination Unreachable messages
            received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 3 }

icmpInTimeExcds OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Time Exceeded messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 4 }

icmpInParmProbs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Parameter Problem messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 5 }

icmpInSrcQuenchs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Source Quench messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 6 }

icmpInRedirects OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Redirect messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 7 }

icmpInEchos OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Echo (request) messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 8 }

icmpInEchoReps OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Echo Reply messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 9 }

icmpInTimestamps OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Timestamp (request) messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 10 }

icmpInTimestampReps OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Timestamp Reply messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 11 }

icmpInAddrMasks OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Address Mask Request messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 12 }

icmpInAddrMaskReps OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Address Mask Reply messages received.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 13 }

icmpOutMsgs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The total number of ICMP messages which this entity
            attempted to send.  Note that this counter includes all
            those counted by icmpOutErrors.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            icmpStatsOutMsgs."

    ::= { icmp 14 }

icmpOutErrors OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP messages which this entity did not send
            due to problems discovered within ICMP, such as a lack of
            buffers.  This value should not include errors discovered
            outside the ICMP layer, such as the inability of IP to route
            the resultant datagram.  In some implementations, there may
            be no types of error which contribute to this counter's
            value.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by
            icmpStatsOutErrors."
    ::= { icmp 15 }

icmpOutDestUnreachs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Destination Unreachable messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 16 }

icmpOutTimeExcds OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Time Exceeded messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 17 }

icmpOutParmProbs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated

    DESCRIPTION
           "The number of ICMP Parameter Problem messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 18 }

icmpOutSrcQuenchs OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Source Quench messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 19 }

icmpOutRedirects OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Redirect messages sent.  For a host, this
            object will always be zero, since hosts do not send
            redirects.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 20 }

icmpOutEchos OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Echo (request) messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 21 }

icmpOutEchoReps OBJECT-TYPE
    SYNTAX     Counter32

    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Echo Reply messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 22 }

icmpOutTimestamps OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Timestamp (request) messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 23 }

icmpOutTimestampReps OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Timestamp Reply messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 24 }

icmpOutAddrMasks OBJECT-TYPE
    SYNTAX     Counter32
    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Address Mask Request messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 25 }

icmpOutAddrMaskReps OBJECT-TYPE
    SYNTAX     Counter32

    MAX-ACCESS read-only
    STATUS     deprecated
    DESCRIPTION
           "The number of ICMP Address Mask Reply messages sent.

            This object has been deprecated, as a new IP version-neutral
            table has been added.  It is loosely replaced by a column in
            the icmpMsgStatsTable."
    ::= { icmp 26 }

-- deprecated conformance information
-- deprecated compliance statements

ipMIBCompliance MODULE-COMPLIANCE
    STATUS     deprecated
    DESCRIPTION
           "The compliance statement for systems that implement only
            IPv4.  For version-independence, this compliance statement
            is deprecated in favor of ipMIBCompliance2."
    MODULE  -- this module
        MANDATORY-GROUPS { ipGroup,
                           icmpGroup }
    ::= { ipMIBCompliances 1 }

-- deprecated units of conformance

ipGroup OBJECT-GROUP
    OBJECTS   { ipForwarding,           ipDefaultTTL,
                ipInReceives,           ipInHdrErrors,
                ipInAddrErrors,         ipForwDatagrams,
                ipInUnknownProtos,      ipInDiscards,
                ipInDelivers,           ipOutRequests,
                ipOutDiscards,          ipOutNoRoutes,
                ipReasmTimeout,         ipReasmReqds,
                ipReasmOKs,             ipReasmFails,
                ipFragOKs,              ipFragFails,
                ipFragCreates,          ipAdEntAddr,
                ipAdEntIfIndex,         ipAdEntNetMask,
                ipAdEntBcastAddr,       ipAdEntReasmMaxSize,
                ipNetToMediaIfIndex,    ipNetToMediaPhysAddress,
                ipNetToMediaNetAddress, ipNetToMediaType,
                ipRoutingDiscards
}
    STATUS     deprecated
    DESCRIPTION
           "The ip group of objects providing for basic management of IP
            entities, exclusive of the management of IP routes.

            As part of the version independence, this group has been
            deprecated.  "
    ::= { ipMIBGroups 1 }

icmpGroup OBJECT-GROUP
    OBJECTS   { icmpInMsgs,          icmpInErrors,
                icmpInDestUnreachs,  icmpInTimeExcds,
                icmpInParmProbs,     icmpInSrcQuenchs,
                icmpInRedirects,     icmpInEchos,
                icmpInEchoReps,      icmpInTimestamps,
                icmpInTimestampReps, icmpInAddrMasks,
                icmpInAddrMaskReps,  icmpOutMsgs,
                icmpOutErrors,       icmpOutDestUnreachs,
                icmpOutTimeExcds,    icmpOutParmProbs,
                icmpOutSrcQuenchs,   icmpOutRedirects,
                icmpOutEchos,        icmpOutEchoReps,
                icmpOutTimestamps,   icmpOutTimestampReps,
                icmpOutAddrMasks,    icmpOutAddrMaskReps }
    STATUS     deprecated
    DESCRIPTION
           "The icmp group of objects providing ICMP statistics.

            As part of the version independence, this group has been
            deprecated.  "
    ::= { ipMIBGroups 2 }

END

6.  Previous Work

   This document contains objects modified from RFC 1213 [11], RFC 2011
   [12], RFC 2465 [13], and RFC 2466 [14].

7.  References

7.1.  Normative References

   [1]  McCloghrie, K., Perkins, D., and J. Schoenwaelder, "Structure of
        Management Information Version 2 (SMIv2)", STD 58, RFC 2578,
        April 1999.

   [2]  McCloghrie, K., Perkins, D., and J. Schoenwaelder, "Textual
        Conventions for SMIv2", STD 58, RFC 2579, April 1999.

   [3]  McCloghrie, K., Perkins, D., and J. Schoenwaelder, "Conformance
        Statements for SMIv2", STD 58, RFC 2580, April 1999.

   [4]  Narten, T., Nordmark, E., and W. Simpson, "Neighbor Discovery
        for IP Version 6 (IPv6)", RFC 2461, December 1998.

   [5]  Thomson, S. and T. Narten, "IPv6 Stateless Address
        Autoconfiguration", RFC 2462, December 1998.

   [6]  McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB",
        RFC 2863, June 2000.

   [7]  Daniele, M., Haberman, B., Routhier, S., and J. Schoenwaelder,
        "Textual Conventions for Internet Network Addresses", RFC 4001,
        February 2005.

   [8]  Draves, R. and D. Thaler, "Default Router Preferences and More-
        Specific Routes", RFC 4191, November 2005.

7.2.  Informative References

   [9]  Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction
        and Applicability Statements for Internet-Standard Management
        Framework", RFC 3410, December 2002.

   [10] Plummer, D., "Ethernet Address Resolution Protocol: Or
        converting network protocol addresses to 48.bit Ethernet address
        for transmission on Ethernet hardware", STD 37, RFC 826,
        November 1982.

   [11] McCloghrie, K. and M. Rose, "Management Information Base for
        Network Management of TCP/IP-based internets:MIB-II", STD 17,
        RFC 1213, March 1991.

   [12] McCloghrie, K., "SNMPv2 Management Information Base for the
        Internet Protocol using SMIv2", RFC 2011, November 1996.

   [13] Haskin, D. and S. Onishi, "Management Information Base for IP
        Version 6: Textual Conventions and General Group", RFC 2465,
        December 1998.

   [14] Haskin, D. and S. Onishi, "Management Information Base for IP
        Version 6: ICMPv6 Group", RFC 2466, December 1998.

   [15] Narten, T. and R. Draves, "Privacy Extensions for Stateless
        Address Autoconfiguration in IPv6", RFC 3041, January 2001.

   [16] Haberman, B., "IP Forwarding Table MIB", RFC 4292, April 2006.

   [17] Hinden, R. and S. Deering, "IP Version 6 Addressing
        Architecture", RFC 4291, February 2006.

8.  Security Considerations

   There are a number of management objects defined in this MIB module
   with a MAX-ACCESS clause of read-write and/or read-create.  Such
   objects may be considered sensitive or vulnerable in some network
   environments.  The support for SET operations in a non-secure
   environment without proper protection can have a negative effect on
   network operations.  These are the tables and objects and their
   sensitivity/vulnerability:

      ipForwarding and ipv6IpForwarding - these objects allow a manager
      to enable or disable the routing functions on the entity.  By
      disabling the routing functions, an attacker would possibly be
      able to deny service to users.  By enabling the routing functions,
      an attacker could open a conduit into an area.  This might result
      in the area providing transit for packets it shouldn't or might
      allow the attacker access to the area bypassing security
      safeguards.

      ipDefaultTTL and ipv6IpDefaultHopLimit - these objects allow a
      manager to determine the diameter of the valid area for a packet.
      By decreasing the value of these objects, an attacker could cause
      packets to be discarded before reaching their destinations.

      ipv4InterfaceEnableStatus and ipv6InterfaceEnableStatus - these
      objects allow a manager to enable or disable IPv4 and IPv6 on a
      specific interface.  By enabling a protocol on an interface, an
      attacker might be able to create an unsecured path into a node (or
      through it if routing is also enabled).  By disabling a protocol
      on an interface, an attacker might be able to force packets to be
      routed through some other interface or deny access to some or all
      of the network via that protocol.

      ipAddressTable - the objects in this table specify the addresses
      in use on this node.  By modifying this information, an attacker
      can cause a node to either ignore messages destined to it or
      accept (at least at the IP layer) messages it would otherwise
      ignore.  The use of filtering or security associations may reduce
      the potential damage in the latter case.

      ipv6RouterAdvertTable - the objects in this table specify the
      information that a router should propagate in its routing
      advertisement messages.  By modifying this information, an
      attacker can interfere with the auto-configuration of all hosts on
      the link.  Most modifications to this table will result in a

      denial of service to some or all hosts on the link.  However two
      objects, ipv6RouterAdvertManagedFlag and
      ipv6RouterAdvertOtherConfigFlag, indicate if a host should acquire
      configuration information from some other source.  By enabling
      these, an attacker might be able to cause a host to retrieve its
      configuration information from a compromised source.

      ipNetToPhysicalPhysAddress and ipNetToPhysicalType - these objects
      specify information used to translate a network (IP) address into
      a media dependent address.  By modifying these objects, an
      attacker could disable communication with a node or divert
      messages from one node to another.  However, the attacker may be
      able to carry out a similar attack by simply responding to the ARP
      or ND request made by the target node.

   Some of the readable objects in this MIB module (i.e., objects with a
   MAX-ACCESS other than not-accessible) may be considered sensitive or
   vulnerable in some network environments.  It is thus important to
   control even GET access to these objects and possibly to even encrypt
   the values of these objects when sending them over the network via
   SNMP.

   These are the tables and objects and their sensitivity/vulnerability:

      Essentially, all of the objects in this MIB could be considered
      sensitive as they report on the status of the IP modules within a
      system.  However, the ipSystemStatsTable, ipIfStatsTable, and
      ipAddressTable are likely to be of most interest to an attacker.
      The statistics tables supply information about the quantity and
      type of traffic this node is processing and, especially for
      transit providers, may be considered sensitive.  The address table
      provides a convenient list of all addresses in use by this node.
      Each address in isolation is unremarkable, however, the total list
      would allow an attacker to correlate otherwise unrelated traffic.
      For example, an attacker might be able to correlate an RFC 3041
      [15] private address with known public addresses, thus
      circumventing the intentions of RFC 3041.

   SNMP versions prior to SNMPv3 did not include adequate security.
   Even if the network itself is secure (for example by using IPSec),
   even then, there is no control as to who on the secure network is
   allowed to access and GET/SET (read/change/create/delete) the objects
   in this MIB module.

   It is RECOMMENDED that implementers consider the security features as
   provided by the SNMPv3 framework (see [9], section 8), including full
   support for the SNMPv3 cryptographic mechanisms (for authentication
   and privacy).

   Further, deployment of SNMP versions prior to SNMPv3 is NOT
   RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
   enable cryptographic security.  It is then a customer/operator
   responsibility to ensure that the SNMP entity giving access to an
   instance of this MIB module, is properly configured to give access to
   the objects only to those principals (users) that have legitimate
   rights to indeed GET or SET (change/create/delete) them.

9.  Acknowledgements

   Reviews and other contributions were made by:

   Dario Acornero, Cisco Systems
   Mike MacFaden, VMWare
   Keith McCloghrie, Cisco Systems
   Juergen Schoenwalder, TU Braunschweig
   Margaret Wasserman, Devicescape

10.  Authors

   This document was written by the IPv6 MIB revision design team:

   Bill Fenner, AT&T Labs -- Research
   EMail: fenner@research.att.com

   Brian Haberman
   EMail: brian@innovationslab.net

   Shawn A. Routhier
   EMail: sar@iwl.com

   Dave Thaler, Microsoft
   EMail: dthaler@microsoft.com

   This document updates parts of the MIBs from several other documents.
   RFC 2011 is the previous update to the IP MIB.  RFC 2465 and RFC 2466
   are the first versions that specified IPv6 addresses and information.

   RFC 2011:
   Keith McCloghrie, Cisco Systems (Editor)

   RFC 2465 and RFC 2466:
   Dimitry Haskin, Bay Networks

   Steve Onishi, Bay Networks

Editor's Contact Information

   Shawn A. Routhier
   Interworking Labs
   108 Whispering Pines Dr. Suite 235
   Scotts Valley, CA 95066
   USA

   EMail: sar@iwl.com

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