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RFC 5240 - Protocol Independent Multicast (PIM) Bootstrap Router


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Network Working Group                                           B. Joshi
Request for Comments: 5240                     Infosys Technologies Ltd.
Category: Standards Track                                     R. Bijlani
                                                               June 2008

       Protocol Independent Multicast (PIM) Bootstrap Router MIB

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.

Abstract

   This document 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
   managing the Bootstrap Router (BSR) mechanism for PIM (Protocol
   Independent Multicast).

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  The Internet-Standard Management Framework . . . . . . . . . .  2
   3.  Conventions  . . . . . . . . . . . . . . . . . . . . . . . . .  2
   4.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  2
   5.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 17
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 19
   8.  Acknowledgments  . . . . . . . . . . . . . . . . . . . . . . . 19
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 20
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 20
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 20

1.  Introduction

   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 managing the
   Bootstrap Router (BSR) mechanism for PIM [RFC4601], [RFC5059].

   This document was created by moving some of the PIM BSR-specific MIB
   tables from one of the earlier versions of PIM MIB [RFC5060].

2.  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 [RFC3410].

   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 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
   [RFC2580].

3.  Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

4.  Overview

   This MIB module contains four tables.  The tables are:

   1.  The Candidate-RP Table, which contains one row for each multicast
       group address prefix for which the local router is configured to
       advertise itself as a Candidate-RP (C-RP).  This table exists on
       routers that are configured as Candidate-RP.

   2.  The Elected BSR RP-Set Table, which contains one row for each
       Group-to-RP mapping that was received in C-RP advertisements.
       This table exists on a router that is an elected BSR (E-BSR).

   3.  The Candidate-BSR Table, which contains one row for each
       Candidate-BSR configuration for the local router.  This table
       exists on routers that are configured as Candidate-BSR.

   4.  The Elected-BSR Table, which contains one row for each elected
       BSR.  This table exists on a router that is an elected BSR.

   This MIB module uses textual conventions defined in the INET-ADDRESS-
   MIB [RFC4001].

5.  Definitions

   PIM-BSR-MIB DEFINITIONS ::= BEGIN

   IMPORTS
       MODULE-IDENTITY, OBJECT-TYPE,
       NOTIFICATION-TYPE,
       mib-2, Unsigned32, TimeTicks     FROM SNMPv2-SMI
       RowStatus, TruthValue,
       StorageType                      FROM SNMPv2-TC
       MODULE-COMPLIANCE, OBJECT-GROUP,
       NOTIFICATION-GROUP               FROM SNMPv2-CONF
       InetAddressType,
       InetAddressPrefixLength,
       InetAddress,
       InetZoneIndex                    FROM INET-ADDRESS-MIB;

   pimBsrMIB MODULE-IDENTITY
       LAST-UPDATED "200805280000Z" -- 28 May 2008
       ORGANIZATION
               "IETF Protocol Independent Multicast (PIM) Working Group"
       CONTACT-INFO
               "Email: pim@ietf.org
                WG charter:
                http://www.ietf.org/html.charters/pim-charter.html"
       DESCRIPTION
               "The MIB module for management of the Bootstrap Router
               (BSR) mechanism for PIM routers.

               Copyright (C) The IETF Trust (2008).  This version
               of this MIB module is part of RFC 5240; see the RFC
               itself for full legal notices."
       REVISION     "200805280000Z" -- 28 May 2008
       DESCRIPTION  "Initial version, published as RFC 5240."
       ::= { mib-2 172 }

   --
   -- Top-level structure
   --

   pimBsrNotifications   OBJECT IDENTIFIER ::= { pimBsrMIB 0 }
   pimBsrObjects         OBJECT IDENTIFIER ::= { pimBsrMIB 1 }

   --
   -- Conformance Information
   --

   pimBsrConformance OBJECT IDENTIFIER ::= { pimBsrMIB 2 }
   pimBsrCompliances OBJECT IDENTIFIER ::= { pimBsrConformance 1 }
   pimBsrGroups      OBJECT IDENTIFIER ::= { pimBsrConformance 2 }

   --
   -- The BSR Candidate-RP Table
   --

   pimBsrCandidateRPTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF PimBsrCandidateRPEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The (conceptual) table listing the IP multicast group
               prefixes for which the local router is to advertise
               itself as a Candidate-RP."
       ::= { pimBsrObjects 1 }

   pimBsrCandidateRPEntry OBJECT-TYPE
       SYNTAX     PimBsrCandidateRPEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry (conceptual row) in the
                pimBsrCandidateRPTable."
       INDEX      { pimBsrCandidateRPAddressType,
                    pimBsrCandidateRPAddress,
                    pimBsrCandidateRPGroupAddress,
                    pimBsrCandidateRPGroupPrefixLength }
       ::= { pimBsrCandidateRPTable 1 }

   PimBsrCandidateRPEntry ::= SEQUENCE {
       pimBsrCandidateRPAddressType       InetAddressType,
       pimBsrCandidateRPAddress           InetAddress,
       pimBsrCandidateRPGroupAddress      InetAddress,
       pimBsrCandidateRPGroupPrefixLength InetAddressPrefixLength,
       pimBsrCandidateRPBidir             TruthValue,
       pimBsrCandidateRPAdvTimer          TimeTicks,
       pimBsrCandidateRPPriority          Unsigned32,
       pimBsrCandidateRPAdvInterval       Unsigned32,
       pimBsrCandidateRPHoldtime          Unsigned32,
       pimBsrCandidateRPStatus            RowStatus,
       pimBsrCandidateRPStorageType       StorageType
   }

   pimBsrCandidateRPAddressType OBJECT-TYPE
       SYNTAX     InetAddressType
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The Inet address type of the Candidate-RP."
       ::= { pimBsrCandidateRPEntry 1 }

   pimBsrCandidateRPAddress OBJECT-TYPE
       SYNTAX     InetAddress (SIZE (4|8|16|20))
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The (unicast) address that will be advertised as a
               Candidate-RP.  The InetAddressType is given by the
               pimBsrCandidateRPAddressType object."
       ::= { pimBsrCandidateRPEntry 2 }

   pimBsrCandidateRPGroupAddress OBJECT-TYPE
       SYNTAX     InetAddress (SIZE (4|8|16|20))
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The IP multicast group address that, when combined with
               the corresponding value of
               pimBsrCandidateRPGroupPrefixLength, identifies a group
               prefix for which the local router will advertise itself
               as a Candidate-RP.  The InetAddressType is given by the
               pimBsrCandidateRPAddressType object.

               This address object is only significant up to
               pimBsrCandidateRPGroupPrefixLength bits.  The
               remainder of the address bits are zero.  This is
               especially important for this field, which is part of
               the index of this entry.  Any non-zero bits would
               signify an entirely different entry."
       ::= { pimBsrCandidateRPEntry 3 }

   pimBsrCandidateRPGroupPrefixLength OBJECT-TYPE
       SYNTAX     InetAddressPrefixLength (4..128)
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The multicast group address mask that, when combined
               with the corresponding value of
               pimBsrCandidateRPGroupAddress, identifies a group prefix
               for which the local router will advertise itself as a
               Candidate-RP.  The InetAddressType is given by the

               pimBsrCandidateRPAddressType object."
       ::= { pimBsrCandidateRPEntry 4 }

   pimBsrCandidateRPBidir OBJECT-TYPE
       SYNTAX     TruthValue
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "If this object is set to TRUE, this group range is
               advertised with this RP as a BIDIR-PIM group range.  If
               it is set to FALSE, it is advertised as a PIM-SM group
               range."
       DEFVAL { false }
       ::= { pimBsrCandidateRPEntry 5 }

   pimBsrCandidateRPAdvTimer OBJECT-TYPE
       SYNTAX     TimeTicks
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The time remaining before the local router next sends
               a Candidate-RP-Advertisement to the elected BSR for
               this zone."
       ::= { pimBsrCandidateRPEntry 6 }

   pimBsrCandidateRPPriority OBJECT-TYPE
       SYNTAX     Unsigned32 (0..255)
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The priority for this Candidate-RP advertised in
                Candidate-RP-Advertisements."
       REFERENCE "RFC 5059, section 3.2"
       DEFVAL { 192 }
       ::= { pimBsrCandidateRPEntry 7 }

   pimBsrCandidateRPAdvInterval OBJECT-TYPE
       SYNTAX     Unsigned32 (1..26214)
       UNITS      "seconds"
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "A Candidate-RP generates Candidate-RP-Advertisements
               periodically.  This object represents the time interval
               in seconds between two consecutive advertisements."

       REFERENCE "RFC 5059, sections 3.2 and 5"
       DEFVAL { 60 }

       ::= { pimBsrCandidateRPEntry 8 }

   pimBsrCandidateRPHoldtime OBJECT-TYPE
       SYNTAX     Unsigned32 (0..65535)
       UNITS      "seconds"
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "Holdtime for this Candidate-RP.  The amount of time (in
               seconds) this Candidate-RP entry is valid.

               This object's value can be zero only when this C-RP is
               shutting down."

       REFERENCE "RFC 5059, section 4.2"
       DEFVAL { 150 }

       ::= { pimBsrCandidateRPEntry 9 }

   pimBsrCandidateRPStatus OBJECT-TYPE
       SYNTAX     RowStatus
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The status of this row, by which new entries may be
               created, or old entries deleted from this table.

               This status object can be set to active(1) without
               setting any other columnar objects in this entry.

               All writable objects in this entry can be modified
               when the status of this entry is active(1)."

       ::= { pimBsrCandidateRPEntry 10 }

   pimBsrCandidateRPStorageType OBJECT-TYPE
       SYNTAX     StorageType
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The storage type for this row.  Rows having the value
               'permanent' need not allow write-access to any columnar
               objects in the row."
         DEFVAL { nonVolatile }
      ::= { pimBsrCandidateRPEntry 11 }

   --

   -- The BSR Elected BSR RP-Set Table
   --

   pimBsrElectedBSRRPSetTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF PimBsrElectedBSRRPSetEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The (conceptual) table listing BSR-specific information
               about PIM group mappings learned via C-RP advertisements
               or created locally using configurations.  This table is
               maintained only on the Elected BSR.

               An Elected BSR uses this table to create Bootstrap
               messages after applying a local policy to include some
               or all of the group mappings in this table."

       ::= { pimBsrObjects 2 }

   pimBsrElectedBSRRPSetEntry OBJECT-TYPE
       SYNTAX     PimBsrElectedBSRRPSetEntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry (conceptual row) in the
                pimBsrElectedBSRRPSetTable."
       INDEX      { pimBsrElectedBSRGrpMappingAddrType,
                    pimBsrElectedBSRGrpMappingGrpAddr,
                    pimBsrElectedBSRGrpMappingGrpPrefixLen,
                    pimBsrElectedBSRGrpMappingRPAddr }
       ::= { pimBsrElectedBSRRPSetTable 1 }

   PimBsrElectedBSRRPSetEntry ::= SEQUENCE {
       pimBsrElectedBSRGrpMappingAddrType      InetAddressType,
       pimBsrElectedBSRGrpMappingGrpAddr       InetAddress,
       pimBsrElectedBSRGrpMappingGrpPrefixLen  InetAddressPrefixLength,
       pimBsrElectedBSRGrpMappingRPAddr        InetAddress,
       pimBsrElectedBSRRPSetPriority           Unsigned32,
       pimBsrElectedBSRRPSetHoldtime           Unsigned32,
       pimBsrElectedBSRRPSetExpiryTime         TimeTicks,
       pimBsrElectedBSRRPSetGrpBidir           TruthValue
   }

   pimBsrElectedBSRGrpMappingAddrType OBJECT-TYPE
       SYNTAX     InetAddressType
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION

               "The Inet address type of the IP multicast group
               prefix."
       ::= { pimBsrElectedBSRRPSetEntry 2 }

   pimBsrElectedBSRGrpMappingGrpAddr OBJECT-TYPE
       SYNTAX     InetAddress (SIZE (4|8|16|20))
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The IP multicast group address that, when combined
               with pimBsrElectedBSRGrpMappingGrpPrefixLen, gives the
               group prefix for this mapping.  The InetAddressType is
               given by the pimBsrElectedBSRGrpMappingAddrType object.

               This address object is only significant up to
               pimBsrElectedBSRGrpMappingGrpPrefixLen bits.  The
               remainder of the address bits are zero.  This is
               especially important for this field, which is part of
               the index of this entry.  Any non-zero bits would
               signify an entirely different entry."
       ::= { pimBsrElectedBSRRPSetEntry 3 }

   pimBsrElectedBSRGrpMappingGrpPrefixLen OBJECT-TYPE
       SYNTAX     InetAddressPrefixLength (4..128)
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The multicast group prefix length that, when combined
               with pimBsrElectedBSRGrpMappingGrpAddr, gives the group
               prefix for this mapping.  The InetAddressType is given by
               the pimBsrElectedBSRGrpMappingAddrType object.  If
               pimBsrElectedBSRGrpMappingAddrType is 'ipv4' or 'ipv4z',
               this object must be in the range 4..32.  If
               pimBsrElectedBSRGrpMappingAddrType is 'ipv6' or 'ipv6z',
               this object must be in the range 8..128."
       ::= { pimBsrElectedBSRRPSetEntry 4 }

   pimBsrElectedBSRGrpMappingRPAddr OBJECT-TYPE
       SYNTAX     InetAddress (SIZE (4|8|16|20))
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The IP address of the RP to be used for groups within
               this group prefix.  The InetAddressType is given by the
               pimBsrElectedBSRGrpMappingAddrType object."
       ::= { pimBsrElectedBSRRPSetEntry 5 }

   pimBsrElectedBSRRPSetPriority OBJECT-TYPE

       SYNTAX     Unsigned32 (0..255)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The priority for RP.  Numerically higher values for
               this object indicate lower priorities, with the value
               zero denoting the highest priority."
       REFERENCE "RFC 5059, section 4.1"
       ::= { pimBsrElectedBSRRPSetEntry 6 }

   pimBsrElectedBSRRPSetHoldtime OBJECT-TYPE
       SYNTAX     Unsigned32 (0..65535)
       UNITS      "seconds"
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The holdtime for RP"
       REFERENCE "RFC 5059, section 4.1"
       ::= { pimBsrElectedBSRRPSetEntry 7 }

   pimBsrElectedBSRRPSetExpiryTime OBJECT-TYPE
       SYNTAX     TimeTicks
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The minimum time remaining before this entry will be
               aged out.  The value zero indicates that this entry will
               never be aged out."
       ::= { pimBsrElectedBSRRPSetEntry 8 }

   pimBsrElectedBSRRPSetGrpBidir OBJECT-TYPE
       SYNTAX     TruthValue
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "If this object is TRUE, this group range with this
               RP is a BIDIR-PIM group range.  If it is set to FALSE,
               it is a PIM-SM group range."
       ::= { pimBsrElectedBSRRPSetEntry 9 }

   --
   -- The BSR Candidate-BSR Table
   --

   pimBsrCandidateBSRTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF PimBsrCandidateBSREntry
       MAX-ACCESS not-accessible
       STATUS     current

       DESCRIPTION
               "The (conceptual) table containing Candidate-BSR
               configuration for the local router.  The table contains
               one row for each zone for which the local router is
               to advertise itself as a Candidate-BSR."
       ::= { pimBsrObjects 3 }

   pimBsrCandidateBSREntry OBJECT-TYPE
       SYNTAX     PimBsrCandidateBSREntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry (conceptual row) in the
               pimBsrCandidateBSRTable."
       INDEX      { pimBsrCandidateBSRZoneIndex }
       ::= { pimBsrCandidateBSRTable 1 }

   PimBsrCandidateBSREntry ::= SEQUENCE {
       pimBsrCandidateBSRZoneIndex        InetZoneIndex,
       pimBsrCandidateBSRAddressType      InetAddressType,
       pimBsrCandidateBSRAddress          InetAddress,
       pimBsrCandidateBSRPriority         Unsigned32,
       pimBsrCandidateBSRHashMaskLength   Unsigned32,
       pimBsrCandidateBSRElectedBSR       TruthValue,
       pimBsrCandidateBSRBootstrapTimer   TimeTicks,
       pimBsrCandidateBSRStatus           RowStatus,
       pimBsrCandidateBSRStorageType      StorageType
   }

   pimBsrCandidateBSRZoneIndex OBJECT-TYPE
       SYNTAX     InetZoneIndex (1..4294967295)
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The zone index uniquely identifies the zone on a
               device to which this Candidate-BSR is attached.  There is
               one entry for each zone in ipMcastZoneTable.  Scope-level
               information for this zone can be extracted from
               ipMcastZoneTable in IP Multicast MIB [RFC5132].

               Zero is a special value used to request the default zone
               for a given scope.  Zero is not a valid value for this
               object."

       ::= { pimBsrCandidateBSREntry 1 }

   pimBsrCandidateBSRAddressType OBJECT-TYPE
       SYNTAX     InetAddressType

       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The address type of the Candidate-BSR."
       ::= { pimBsrCandidateBSREntry 2 }

   pimBsrCandidateBSRAddress OBJECT-TYPE
       SYNTAX     InetAddress
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The (unicast) address that the local router will
               use to advertise itself as a Candidate-BSR.  The
               InetAddressType is given by the
               pimBsrCandidateBSRAddressType object."
       ::= { pimBsrCandidateBSREntry 3 }

   pimBsrCandidateBSRPriority OBJECT-TYPE
       SYNTAX     Unsigned32 (0..255)
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The priority value for the local router as a
               Candidate-BSR for this zone.  Numerically higher
               values for this object indicate higher priorities."
       DEFVAL { 0 }
       ::= { pimBsrCandidateBSREntry 4 }

   pimBsrCandidateBSRHashMaskLength OBJECT-TYPE
       SYNTAX     Unsigned32 (0..128)
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The hash mask length (used in the RP hash function)
               that the local router will advertise in its Bootstrap
               messages for this zone.  This object defaults
               to 30 if pimBsrCandidateBSRAddressType is 'ipv4' or
               'ipv4z' , and defaults to 126 if
               pimBsrCandidateBSRAddressType is 'ipv6' or 'ipv6z'."
       ::= { pimBsrCandidateBSREntry 5 }

   pimBsrCandidateBSRElectedBSR OBJECT-TYPE
       SYNTAX     TruthValue
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "Whether the local router is the elected BSR for this
               zone."

       ::= { pimBsrCandidateBSREntry 6 }

   pimBsrCandidateBSRBootstrapTimer OBJECT-TYPE
       SYNTAX     TimeTicks
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The time remaining before the local router next
               originates a Bootstrap message for this zone.
               Value of this object is zero if
               pimBsrCandidateBSRElectedBSR is 'FALSE'."
       ::= { pimBsrCandidateBSREntry 7 }

   pimBsrCandidateBSRStatus OBJECT-TYPE
       SYNTAX     RowStatus
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The status of this row, by which new entries may
               be created or old entries deleted from this table.

               This status object can be set to active(1) without
               setting any other columnar objects in this entry.

               All writable objects in this entry can be modified
               when the status of this entry is active(1)."
       ::= { pimBsrCandidateBSREntry 8 }

   pimBsrCandidateBSRStorageType OBJECT-TYPE
       SYNTAX     StorageType
       MAX-ACCESS read-create
       STATUS     current
       DESCRIPTION
               "The storage type for this row.  Rows having the value
               'permanent' need not allow write-access to any columnar
               objects in the row."
         DEFVAL { nonVolatile }
      ::= { pimBsrCandidateBSREntry 9 }

   --
   -- The BSR Elected-BSR Table
   --

   pimBsrElectedBSRTable OBJECT-TYPE
       SYNTAX     SEQUENCE OF PimBsrElectedBSREntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION

               "The (conceptual) table containing information about
               elected BSRs.  The table contains one row for each
               zone for which there is an elected BSR."
       ::= { pimBsrObjects 4 }

   pimBsrElectedBSREntry OBJECT-TYPE
       SYNTAX     PimBsrElectedBSREntry
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "An entry (conceptual row) in the
                pimBsrElectedBSRTable."
       INDEX      { pimBsrElectedBSRZoneIndex }
       ::= { pimBsrElectedBSRTable 1 }

   PimBsrElectedBSREntry ::= SEQUENCE {
       pimBsrElectedBSRZoneIndex        InetZoneIndex,
       pimBsrElectedBSRAddressType      InetAddressType,
       pimBsrElectedBSRAddress          InetAddress,
       pimBsrElectedBSRPriority         Unsigned32,
       pimBsrElectedBSRHashMaskLength   Unsigned32,
       pimBsrElectedBSRExpiryTime       TimeTicks
   }

   pimBsrElectedBSRZoneIndex OBJECT-TYPE
       SYNTAX     InetZoneIndex (1..4294967295)
       MAX-ACCESS not-accessible
       STATUS     current
       DESCRIPTION
               "The zone index uniquely identifies the zone on a
               device to which this Elected BSR is attached.  There
               is one entry for each zone in ipMcastZoneTable.
               Scope-level information for this zone can be extracted
               from ipMcastZoneTable in IP Multicast MIB [RFC5132].

               Zero is a special value used to request the default zone
               for a given scope.  Zero is not a valid value for this
               object."

       ::= { pimBsrElectedBSREntry 1 }

   pimBsrElectedBSRAddressType OBJECT-TYPE
       SYNTAX     InetAddressType
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The address type of the elected BSR."
       ::= { pimBsrElectedBSREntry 2 }

   pimBsrElectedBSRAddress OBJECT-TYPE
       SYNTAX     InetAddress (SIZE (4|8|16|20))
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The (unicast) address of the elected BSR.  The
               InetAddressType is given by the
               pimBsrElectedBSRAddressType object."
       ::= { pimBsrElectedBSREntry 3 }

   pimBsrElectedBSRPriority OBJECT-TYPE
       SYNTAX     Unsigned32 (0..255)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The priority value for the elected BSR for this address
               type.  Numerically higher values for this object indicate
               higher priorities."
       ::= { pimBsrElectedBSREntry 4 }

   pimBsrElectedBSRHashMaskLength OBJECT-TYPE
       SYNTAX     Unsigned32 (0..128)
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The hash mask length (used in the RP hash function)
               advertised by the elected BSR for this zone."
       ::= { pimBsrElectedBSREntry 5 }

   pimBsrElectedBSRExpiryTime OBJECT-TYPE
       SYNTAX     TimeTicks
       MAX-ACCESS read-only
       STATUS     current
       DESCRIPTION
               "The minimum time remaining before the elected BSR for
               this zone will be declared down."
       ::= { pimBsrElectedBSREntry 6 }

   --
   -- PIM BSR Notifications
   --

   pimBsrElectedBSRLostElection   NOTIFICATION-TYPE
       OBJECTS { pimBsrElectedBSRAddressType,
                 pimBsrElectedBSRAddress,
                 pimBsrElectedBSRPriority }
       STATUS     current
       DESCRIPTION

               "A pimBsrElectedBSRLostElection notification should be
               generated when current E-BSR lost election to a new
               Candidate-BSR.  Only an E-BSR should generate this
               notification.

               This notification is generated when
               pimBsrCandidateBSRElectedBSR becomes FALSE."

       REFERENCE "RFC 5059, section 3.1"
       ::= { pimBsrNotifications 1 }

   pimBsrCandidateBSRWinElection   NOTIFICATION-TYPE
       OBJECTS { pimBsrCandidateBSRElectedBSR }
       STATUS     current
       DESCRIPTION
               "A pimBsrCandidateBSRWinElection notification should be
               generated when a C-BSR wins BSR Election.  Only an
               E-BSR should generate this notification.

               This notification is generated when
               pimBsrCandidateBSRElectedBSR becomes TRUE."

       REFERENCE "RFC 5059, section 3.1"
       ::= { pimBsrNotifications 2 }

   --
   -- Compliance Statements
   --

   pimBsrCompliance MODULE-COMPLIANCE
       STATUS  current
       DESCRIPTION
               "The compliance statement for PIM routers that implement
               the Bootstrap Router (BSR) mechanism."
       MODULE  -- this module
       MANDATORY-GROUPS { pimBsrObjectGroup }

         GROUP   pimBsrDiagnosticsGroup
         DESCRIPTION
             "This group is optional."

       ::= { pimBsrCompliances 1 }

   --
   -- Units of Conformance
   --

   pimBsrObjectGroup OBJECT-GROUP

       OBJECTS { pimBsrCandidateRPBidir,
                 pimBsrCandidateRPAdvTimer,
                 pimBsrCandidateRPPriority,
                 pimBsrCandidateRPAdvInterval,
                 pimBsrCandidateRPHoldtime,
                 pimBsrCandidateRPStatus,
                 pimBsrCandidateRPStorageType,
                 pimBsrElectedBSRRPSetPriority,
                 pimBsrElectedBSRRPSetHoldtime,
                 pimBsrElectedBSRRPSetExpiryTime,
                 pimBsrElectedBSRRPSetGrpBidir,
                 pimBsrCandidateBSRAddress,
                 pimBsrCandidateBSRAddressType,
                 pimBsrCandidateBSRPriority,
                 pimBsrCandidateBSRHashMaskLength,
                 pimBsrCandidateBSRElectedBSR,
                 pimBsrCandidateBSRBootstrapTimer,
                 pimBsrCandidateBSRStatus,
                 pimBsrCandidateBSRStorageType,
                 pimBsrElectedBSRAddress,
                 pimBsrElectedBSRAddressType,
                 pimBsrElectedBSRPriority,
                 pimBsrElectedBSRHashMaskLength,
                 pimBsrElectedBSRExpiryTime }
       STATUS  current
       DESCRIPTION
               "A collection of objects for managing the Bootstrap
               Router (BSR) mechanism for PIM routers."
       ::= { pimBsrGroups 1 }

   pimBsrDiagnosticsGroup NOTIFICATION-GROUP
       NOTIFICATIONS  { pimBsrElectedBSRLostElection,
                        pimBsrCandidateBSRWinElection }
       STATUS  current
       DESCRIPTION
               "Objects providing additional diagnostics related to
               the Bootstrap Router (BSR) mechanism for PIM routers."
       ::= { pimBsrGroups 2 }

   END

6.  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:

   o  A new Candidate-BSR with high priority or modification of priority
      ( bsrCandidateBSRPriority ) of an existing Candidate-BSR can take
      over the functionality of an Elected BSR, which can prevent and
      disrupt the services.

   o  A new Candidate-RP with lower priority or modification of priority
      ( bsrCandidateRPPriority ) of an existing Candidate-RP can force
      other routers to select itself for a particular group prefix.
      This can prevent and disrupt the services provided through this
      group prefix.

   The following are the read-write and read-create objects defined in
   this MIB module:

   bsrCandidateRPBidir
   bsrCandidateRPPriority
   bsrCandidateRPAdvInterval
   bsrCandidateRPHoldtime
   bsrCandidateBSRAddressType
   bsrCandidateBSRAddress
   bsrCandidateBSRPriority
   bsrCandidateBSRHashMaskLength

   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 and/or NOTIFY 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:

   pimBsrCandidateRPAdvTimer
   pimBsrElectedBSRRPSetPriority
   pimBsrElectedBSRRPSetHoldtime
   pimBsrElectedBSRRPSetExpiryTime
   pimBsrElectedBSRRPSetGrpBidir
   pimBsrCandidateBSRElectedBSR
   pimBsrCandidateBSRBootstrapTimer
   pimBsrElectedBSRAddressType
   pimBsrElectedBSRAddress
   pimBsrElectedBSRPriority
   pimBsrElectedBSRHashMaskLength
   pimBsrElectedBSRExpiryTime

   In this MIB module, possible effects that can be induced by GET
   operations include:

   o  Determination of Elected BSR, Candidate-BSRs, and Candidate-RPs in
      the Multicast Network topology.  This information may be sensitive
      and may be used in preparation for Denial-of-Service (DoS) attacks
      including any of the attacks described above.

   SNMP versions prior to SNMPv3 did not include adequate security.
   Even if the network itself is secure (for example by using IPsec),
   there is still no control over whom on the secure network is allowed
   to access (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 [RFC3410], 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 access (read/change/create/delete) them.

7.  IANA Considerations

   The MIB module in this document uses the following IANA-assigned
   OBJECT IDENTIFIER values recorded in the SMI Numbers registry:

   Descriptor        OBJECT IDENTIFIER value
   ----------        -----------------------
   pimBsrMIB         { mib-2 172 }

8.  Acknowledgments

   This MIB module is based on the original work in [RFC5060] by R.
   Sivaramu, J. Lingard, and B. Joshi.

   Many thanks to Bill Fenner, Stig Venaas, Nidhi Bhaskar, David
   Mcwalter, David Harrington, and J. W. Atwood for their feedback on
   this MIB module.

   Suggested IPv6 multicast MIBs by R. Sivaramu and R. Raghunarayan have
   been used for comparison while editing this MIB module.

9.  References

9.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2578]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Structure of Management Information
              Version 2 (SMIv2)", STD 58, RFC 2578, April 1999.

   [RFC2579]  McCloghrie, K., Ed., Perkins, D., Ed., and J.
              Schoenwaelder, Ed., "Textual Conventions for SMIv2",
              STD 58, RFC 2579, April 1999.

   [RFC2580]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
              "Conformance Statements for SMIv2", STD 58, RFC 2580,
              April 1999.

   [RFC4001]  Daniele, M., Haberman, B., Routhier, S., and J.
              Schoenwaelder, "Textual Conventions for Internet Network
              Addresses", RFC 4001, February 2005.

   [RFC4601]  Fenner, B., Handley, M., Holbrook, H., and I. Kouvelas,
              "Protocol Independent Multicast - Sparse Mode (PIM-SM):
              Protocol Specification (Revised)", RFC 4601, August 2006.

   [RFC5060]  Sivaramu, R., Lingard, J., McWalter, D., Joshi, B., and A.
              Kessler, "Protocol Independent Multicast MIB", RFC 5060,
              January 2008.

   [RFC5059]  Bhaskar, N., Gall, A., Lingard, J., and S. Venaas,
              "Bootstrap Router (BSR) Mechanism for Protocol Independent
              Multicast (PIM)", RFC 5059, January 2008.

   [RFC5132]  McWalter, D., Thaler, D., and A. Kessler, "IP Multicast
              MIB", RFC 5132, December 2007.

9.2.  Informative References

   [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", RFC 3410, December 2002.

Authors' Addresses

   Bharat Joshi
   Infosys Technologies Ltd.
   44 Electronics City, Hosur Road
   Bangalore  560 100
   India

   EMail: bharat_joshi@infosys.com
   URI:   http://www.infosys.com/

   Raina Bijlani

   EMail: rainab@gmail.com

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