Patent application number | Description | Published |
20100002382 | FRONT-TO-BACK COOLING SYSTEM FOR MODULAR SYSTEMS WITH ORTHOGONAL MIDPLANE CONFIGURATION - A front-to-back cooling system allows cooling of an apparatus containing two orthogonal sets of modules. Each set of modules is independently cooled. A vertical set of modules is cooled with vertical air flow across the modules that enters from a front of the apparatus and exhausts from a back of the apparatus. A horizontal set of modules is cooled with horizontal front-to-back air flow. When the horizontal set of modules is at the front of the apparatus, a plenum extending exterior to the vertical set of modules allows exhausting horizontally flowing air to the rear of the apparatus. When the horizontal set of modules is at the rear of the apparatus, a plenum extending exterior to the vertical set of modules allows moving air from the front of the apparatus to a chamber holding the horizontal modules. | 01-07-2010 |
20100014248 | AIRFLOW/COOLING SOLUTION FOR CHASSIS WITH ORTHOGONAL BOARDS - A front-to-back cooling system allows cooling of an apparatus containing two orthogonal sets of modules. A vertical set of modules is cooled with vertical air flow across the modules that enters from a front of the apparatus and exits from the back of the apparatus. A horizontal set of modules is cooled with air flow that passes through openings in a midplane connecting the two sets of modules. | 01-21-2010 |
20100061238 | METHODS AND APPARATUS FOR FLOW CONTROL ASSOCIATED WITH MULTI-STAGED QUEUES - In one embodiment, a method, comprising receiving at a receive side of a physical link a request to suspend transmission of data from a queue within a transmit side of a first stage of queues and to suspend transmission via a path including the physical link, a portion of the first stage of queues, and a portion of a second stage of queues. The method includes sending, in response to the request, a flow control signal to a flow control module configured to schedule transmission of the data from the queue within the transmit side of the first stage of queues. The flow control signal is associated with a first control loop including the path and differing from a second control loop that excludes the first stage of queues. | 03-11-2010 |
20100061239 | METHODS AND APPARATUS FOR FLOW-CONTROLLABLE MULTI-STAGED QUEUES - In one embodiment, a method includes sending a first flow control signal to a first stage of transmit queues when a receive queue is in a congestion state. The method also includes sending a second flow control signal to a second stage of transmit queues different from the first stage of transmit queues when the receive queue is in the congestion state. | 03-11-2010 |
20100061240 | METHODS AND APPARATUS RELATED TO LOW LATENCY WITHIN A DATA CENTER - In one embodiment, an apparatus includes a switch core that has a multi-stage switch fabric. The multi-stage switch fabric has a set of ingress ports and a set of egress ports. The switch core can be configured to be coupled to a set of edge devices via the set of ingress ports and the set of egress ports. The switch core can be configured to receive a packet from an ingress port from the set of ingress ports. The switch core can be configured to send a set of cells associated with the packet from the ingress port to an egress port from the set of egress ports without a store-and-forward delay associated with a zero-load latency for the switch core. | 03-11-2010 |
20100061241 | METHODS AND APPARATUS RELATED TO FLOW CONTROL WITHIN A DATA CENTER SWITCH FABRIC - In one embodiment, an apparatus includes a switch core that has a multi-stage switch fabric physically distributed among a set of chassis. The multi-stage switch fabric has a set of input buffers and a set of output ports. The switch core can be configured to be coupled to a set of edge devices. The apparatus can also include a controller implemented in hardware without software during operation and with software during configuration and monitoring. The controller can be coupled to the set of input buffers and the set of output ports. The controller can be configured to send a flow control signal to an input buffer from the set of input buffers when congestion at an output port from the set of output ports is predicted and before congestion in the switch core occurs. | 03-11-2010 |
20100061242 | METHODS AND APPARATUS RELATED TO A FLEXIBLE DATA CENTER SECURITY ARCHITECTURE - In one embodiment, edge devices can be configured to be coupled to a multi-stage switch fabric and peripheral processing devices. The edge devices and the multi-stage switch fabric can collectively define a single logical entity. A first edge device from the edge devices can be configured to be coupled to a first peripheral processing device from the peripheral processing devices. The second edge device from the edge devices can be configured to be coupled to a second peripheral processing device from the peripheral processing devices. The first edge device can be configured such that virtual resources including a first virtual resource can be defined at the first peripheral processing device. A network management module coupled to the edge devices and configured to provision the virtual resources such that the first virtual resource can be migrated from the first peripheral processing device to the second peripheral processing device. | 03-11-2010 |
20100061367 | METHODS AND APPARATUS RELATED TO LOSSLESS OPERATION WITHIN A DATA CENTER - In one embodiment, an apparatus includes a switch core that defines a single logical entity and has a multi-stage switch fabric that has a set of stages physically distributed across a set of chassis. The set of stages collectively has a set of ingress ports and a set of egress ports. The switch core can be configured to be coupled to a set of peripheral processing devices via the set of ingress ports and the set of egress ports. The switch core can be configured to admit a set of cells associated with a packet into an ingress port from the set of ingress ports when delivery of the set of cells can be substantially guaranteed without loss through the multi-stage switch fabric. | 03-11-2010 |
20100061389 | METHODS AND APPARATUS RELATED TO VIRTUALIZATION OF DATA CENTER RESOURCES - In one embodiment, an apparatus includes a switch core that has a multi-stage switch fabric. A first set of peripheral processing devices coupled to the multi-stage switch fabric by a set of connections that have a protocol. Each peripheral processing device from the first set of peripheral processing devices is a storage node that has virtualized resources. The virtualized resources of the first set of peripheral processing devices collectively define a virtual storage resource interconnected by the switch core. A second set of peripheral processing devices coupled to the multi-stage switch fabric by a set of connections that have the protocol. Each peripheral processing device from the first set of peripheral processing devices is a compute node that has virtualized resources. The virtualized resources of the second set of peripheral processing devices collectively define a virtual compute resource interconnected by the switch core. | 03-11-2010 |
20100061391 | METHODS AND APPARATUS RELATED TO A LOW COST DATA CENTER ARCHITECTURE - In one embodiment, an apparatus can include a first edge device that can have a packet processing module. The first edge device can be configured to receive a packet. The packet processing module of the first edge device can be configured to produce cells based on the packet. A second edge device can have a packet processing module configured to reassemble the packet based on the cells. A multi-stage switch fabric can be coupled to the first edge device and the second edge device. The multi-stage switch fabric can define a single logical entity. The multi-stage switch fabric can have switch modules. Each switch module from the switch modules can have a shared memory device. The multi-stage switch fabric can be configured to switch the cells so that the cells are sent to the second edge device. | 03-11-2010 |
20100061394 | METHODS AND APPARATUS RELATED TO ANY-TO-ANY CONNECTIVITY WITHIN A DATA CENTER - In one embodiment, an apparatus includes a switch core that defines a single logical entity and has a multi-stage switch fabric physically distributed across a plurality of chassis. The multi-stage switch fabric has a plurality of ingress ports and a plurality of egress ports. The switch core is configured to be coupled to a plurality of peripheral processing devices via the plurality of ingress ports and the plurality of egress ports. The switch core is also configured to provide non-blocking connectivity at line rate between a first peripheral processing device disposed with a first chassis and a second peripheral processing device disposed within a second chassis. | 03-11-2010 |
20100158031 | METHODS AND APPARATUS FOR TRANSMISSION OF GROUPS OF CELLS VIA A SWITCH FABRIC - In one embodiment, a method can include receiving at an egress schedule module a request to schedule transmission of a group of cells from an ingress queue through a switch fabric of a multi-stage switch. The ingress queue can be associated with an ingress stage of the multi-stage switch. The egress schedule module can be associated with an egress stage of the multi-stage switch. The method can also include determining, in response to the request, that an egress port at the egress stage of the multi-stage switch is available to transmit the group of cells from the multi-stage switch. | 06-24-2010 |
20100165871 | SYSTEMS AND METHODS FOR DETERMING THE BANDWIDTH USED BY A QUEUE - A system determines bandwidth use by queues in a network device. To do this, the system determines an instantaneous amount of bandwidth used by each of the queues and an average amount of bandwidth used by each of the queues. The system then identifies bandwidth use by each of the queues based on the instantaneous bandwidth used and the average bandwidth used by each of the queues. | 07-01-2010 |
20100165983 | SYSTEM ARCHITECTURE FOR A SCALABLE AND DISTRIBUTED MULTI-STAGE SWITCH FABRIC - In some embodiments, an apparatus includes a first housing, a second housing and at least one cable. The first housing includes a first interface card of a switch fabric. The second housing includes a second interface card of the switch fabric and a third interface card of the switch fabric. The second interface card of the switch fabric is operatively and physically coupled to the third interface card of the switch fabric via a midplane. The second interface card defines a plane that is nonparallel to the a plane defined by the third interface card and a plane defined by the midplane. The plane defined by the third interface card is nonparallel to the plane defined by the second interface card and the plane defined by the midplane. The cable is configured to operatively couple the first interface card to the second interface card. | 07-01-2010 |
20100165984 | METHODS AND APPARATUS RELATED TO A MODULAR SWITCH ARCHITECTURE - In some embodiments, an apparatus includes a first housing, a second housing and at least one cable. The first housing includes a first interface card of a switch fabric. The second housing includes a second interface card of the switch fabric and a third interface card of the switch fabric. The second interface card of the switch fabric is operatively and physically coupled to the third interface card of the switch fabric via a midplane. The second interface card defines a plane that is nonparallel to the a plane defined by the third interface card and a plane defined by the midplane. The plane defined by the third interface card is nonparallel to the plane defined by the second interface card and the plane defined by the midplane. The cable is configured to operatively couple the first interface card to the second interface card. | 07-01-2010 |
20100165990 | SYSTEMS AND METHODS FOR EFFICIENT MULTICAST HANDLING - A network device constructs a notification corresponding to a received multicast data unit, where the notification includes administrative data associated with the multicast data unit that does not include a payload of the multicast data unit. The network device replicates the notification at least three different processing elements at different locations in a processing path of the network device to produce multiple replicated data items and produces a copy of the multicast data unit for each of replicated notifications. The network device forwards each copy of the multicast data unit towards a multicast destination. | 07-01-2010 |
20100172363 | SYSTEMS AND METHODS FOR CONGESTION CONTROL USING RANDOM EARLY DROP AT HEAD OF BUFFER - A system selectively drops data from a queue. The system includes queues that temporarily store data, a dequeue engine that dequeues data from the queues, and a drop engine that operates independently from the dequeue engine. The drop engine selects one of the queues to examine, determines whether to drop data from a head of the examined queue, and marks the data based on a result of the determination. | 07-08-2010 |
20100177777 | PRESERVING THE ORDER OF PACKETS THROUGH A DEVICE - A network device includes one or more sprayers, multiple packet processors, and one or more desprayers. The sprayers receive packets on at least one incoming packet stream and distribute the packets according to a load balancing scheme that balances the number of bytes of packet data that is given to each of the packet processors. The packet processors receive the packets from the sprayers and process the packets to determine routing information for the packets. The desprayers receive the processed packets from the packet processors and transmit the packets on at least one outgoing packet stream based on the routing information. | 07-15-2010 |
20100182931 | DISTRIBUTED ADMISSION CONTROL - A first network client requests initiation of a data transfer with a second network client. An admission control facility (ACF) responds to the initiation request by performing admission analysis to determine whether to initiate the data transfer. The ACF sends one or more packets to the second network client. In response, the second network client sends acknowledgment packets back to the ACF. The ACF performs admission analysis based on the packets sent and the acknowledgment packets, and determines whether the data transfer should be initiated based on the analysis. The admission analysis may be based on a variety of factors, such as the average time to receive an acknowledgment for each packet, the variance of the time to receive an acknowledgment for each packet, a combination of these factors, or a combination of these and other factors. | 07-22-2010 |
20100220590 | SYSTEMS AND METHODS FOR DROPPING DATA USING A DROP PROFILE - A system selectively drops data from queues. The system includes a drop table that stores drop probabilities. The system selects one of the queues to examine and generates an index into the drop table to identify one of the drop probabilities for the examined queue. The system then determines whether to drop data from the examined queue based on the identified drop probability. | 09-02-2010 |
20100322075 | SYSTEMS AND METHODS FOR SELECTIVELY PERFORMING EXPLICIT CONGESTION NOTIFICATION - A system provides congestion control and includes multiple queues that temporarily store data and a drop engine. The system associates a value with each of the queues, where each of the values relates to an amount of memory associated with the queue. The drop engine compares the value associated with a particular one of the queues to one or more programmable thresholds and selectively performs explicit congestion notification or packet dropping on data in the particular queue based on a result of the comparison. | 12-23-2010 |
20100323762 | STATICALLY ORIENTED ON-SCREEN TRANSLUSCENT KEYBOARD - In general, techniques are described for presenting a statically oriented on-screen translucent keyboard. For example, a mobile device may comprise a touch-screen display that displays content from a software application executing on the mobile device and keyboard content defining a translucent on-screen keyboard. The touch-screen display may display the content and the translucent on-screen keyboard in the same orientation relative to the mobile device. The mobile device may further comprise an orientation module that detects a change in orientation of the mobile device. In response to detecting the change in the orientation of the mobile device, the touch-screen display may display the content and the translucent on-screen keyboard in a different orientation from one another relative to the mobile device. The touch-screen display may not change the orientation of the translucent on-screen keyboard. In this respect, the on-screen translucent keyboard remains statically oriented. | 12-23-2010 |
20110011562 | FRONT-TO-BACK COOLING SYSTEM FOR MODULAR SYSTEMS WITH ORTHOGONAL MIDPLANE CONFIGURATION - A front-to-back cooling system allows cooling of an apparatus containing two orthogonal sets of modules. Each set of modules is independently cooled. A vertical set of modules is cooled with vertical air flow across the modules that enters from a front of the apparatus and exhausts from a back of the apparatus. A horizontal set of modules is cooled with horizontal front-to-back air flow. When the horizontal set of modules is at the front of the apparatus, a plenum extending exterior to the vertical set of modules allows exhausting horizontally flowing air to the rear of the apparatus. When the horizontal set of modules is at the rear of the apparatus, a plenum extending exterior to the vertical set of modules allows moving air from the front of the apparatus to a chamber holding the horizontal modules. | 01-20-2011 |
20110096689 | SYSTEMS AND METHODS FOR DETERMINING THE BANDWIDTH USED BY A QUEUE - A system determines bandwidth use by queues in a network device. To do this, the system determines an instantaneous amount of bandwidth used by each of the queues and an average amount of bandwidth used by each of the queues. The system then identifies bandwidth use by each of the queues based on the instantaneous bandwidth used and the average bandwidth used by each of the queues. | 04-28-2011 |
20110103259 | METHODS AND APPARATUS FOR CONFIGURING A VIRTUAL NETWORK SWITCH - In one embodiment, a method includes sending a configuration signal to a virtual network switch module within a control plane of a communications network. The configuration signal is configured to define a first network rule at the virtual network switch module. The method also includes configuring a packet forwarding module such that the packet forwarding module implements a second network rule, and receiving status information from the virtual network switch module and status information from the packet forwarding module. The status information is received via the control plane. | 05-05-2011 |
20110235642 | PRESERVING THE ORDER OF PACKETS THROUGH A DEVICE - A network device includes one or more sprayers, multiple packet processors, and one or more desprayers. The sprayers receive packets on at least one incoming packet stream and distribute the packets according to a load balancing scheme that balances the number of bytes of packet data that is given to each of the packet processors. The packet processors receive the packets from the sprayers and process the packets to determine routing information for the packets. The desprayers receive the processed packets from the packet processors and transmit the packets on at least one outgoing packet stream based on the routing information. | 09-29-2011 |
20110252284 | OPTIMIZATION OF PACKET BUFFER MEMORY UTILIZATION - A method performed by an I/O unit connected to another I/O unit in a network device. The method includes receiving a packet; segmenting the packet into a group of data blocks; storing the group of data blocks in a data memory; generating data protection information for a data block of the group of data blocks; creating a control block for the data block; storing, in a control memory, a group of data items for the control block, the group of data items including information associated with a location, of the data block, within the data memory and the data protection information for the data block; performing a data integrity check on the data block, using the data protection information, to determine whether the data block contains a data error; and outputting the data block when the data integrity check indicates that the data block does not contain a data error. | 10-13-2011 |
20110264822 | FILTERING AND ROUTE LOOKUP IN A SWITCHING DEVICE - Methods and devices for processing packets are provided. The processing device may Include an input interface for receiving data units containing header information of respective packets; a first module configurable to perform packet filtering based on the received data units; a second module configurable to perform traffic analysis based on the received data units; a third module configurable to perform load balancing based on the received data units; and a fourth module configurable to perform route lookups based on the received data | 10-27-2011 |
20120045206 | MULTI-CHASSIS ROUTER WITH MULTIPLEXED OPTICAL INTERCONNECTS - A multi-chassis network device includes a plurality of nodes that operate as a single device within the network and a switch fabric that forwards data plane packets between the plurality of nodes. The switch fabric includes a set of multiplexed optical interconnects coupling the nodes. For example, a multi-chassis router includes a plurality of routing nodes that operate as a single router within a network and a switch fabric that forwards packets between the plurality of routing nodes. The switch fabric includes at least one multiplexed optical interconnect coupling the routing nodes. The nodes of the multi-chassis router may direct portions of the optical signal over the multiplexed optical interconnect to different each other using wave-division multiplexing. | 02-23-2012 |
20120082031 | DISTRIBUTED ADMISSION CONTROL - A first network client requests initiation of a data transfer with a second network client. An admission control facility (ACF) responds to the initiation request by performing admission analysis to determine whether to initiate the data transfer. The ACF sends one or more packets to the second network client. In response, the second network client sends acknowledgment packets back to the ACF. The ACF performs admission analysis based on the packets sent and the acknowledgment packets, and determines whether the data transfer should be initiated based on the analysis. The admission analysis may be based on a variety of factors, such as the average time to receive an acknowledgment for each packet, the variance of the time to receive an acknowledgment for each packet, a combination of these factors, or a combination of these and other factors. | 04-05-2012 |
20120128004 | METHODS AND APPARATUS FOR CENTRALIZED VIRTUAL SWITCH FABRIC CONTROL - In some embodiments, an apparatus comprises a processing module, disposed within a first switch fabric element, configured to detect a second switch fabric element having a routing module when the second switch fabric element is operatively coupled to the first switch fabric element. The processing module is configured to define a virtual processing module configured to be operatively coupled to the second switch fabric element. The virtual processing module is configured to receive a request from the second switch fabric element for forwarding information and the virtual processing module is configured to send the forwarding information to the routing module. | 05-24-2012 |
20120195203 | METHODS AND APPARATUS FOR FLOW CONTROL ASSOCIATED WITH MULTI-STAGED QUEUES - In one embodiment, a method, comprising receiving at a receive side of a physical link a request to suspend transmission of data from a queue within a transmit side of a first stage of queues and to suspend transmission via a path including the physical link, a portion of the first stage of queues, and a portion of a second stage of queues. The method includes sending, in response to the request, a flow control signal to a flow control module configured to schedule transmission of the data from the queue within the transmit side of the first stage of queues. The flow control signal is associated with a first control loop including the path and differing from a second control loop that excludes the first stage of queues. | 08-02-2012 |
20120263178 | SYSTEMS AND METHODS FOR EFFICIENT MULTICAST HANDLING - A network device constructs a notification corresponding to a received multicast data unit, where the notification includes administrative data associated with the multicast data unit that does not include a payload of the multicast data unit. The network device replicates the notification at at least three different processing elements at different locations in a processing path of the network device to produce multiple replicated data items and produces a copy of the multicast data unit for each of replicated notifications. The network device forwards each copy of the multicast data unit towards a multicast destination. | 10-18-2012 |
20120269065 | METHODS AND APPARATUS FOR DEFINING A FLOW CONTROL SIGNAL RELATED TO A TRANSMIT QUEUE - In one embodiment, a processor-readable medium can store code representing instructions that when executed by a processor cause the processor to receive a value representing a congestion level of a receive queue and a value representing a state of a transmit queue. At least a portion of the transmit queue can be defined by a plurality of packets addressed to the receive queue. A rate value for the transmit queue can be defined based on the value representing the congestion level of the receive queue and the value representing the state of the transmit queue. The processor-readable medium can store code representing instructions that when executed by the processor cause the processor to define a suspension time value for the transmit queue based on the value representing the congestion level of the receive queue and the value representing the state of the transmit queue. | 10-25-2012 |
20120275307 | METHODS AND APPARATUS FOR FLOW-CONTROLLABLE MULTI-STAGED QUEUES - In one embodiment, a method includes sending a first flow control signal to a first stage of transmit queues when a receive queue is in a congestion state. The method also includes sending a second flow control signal to a second stage of transmit queues different from the first stage of transmit queues when the receive queue is in the congestion state. | 11-01-2012 |
20120297083 | FILTERING AND ROUTE LOOKUP IN A SWITCHING DEVICE - Methods and devices for processing packets are provided. The processing device may Include an input interface for receiving data units containing header information of respective packets; a first module configurable to perform packet filtering based on the received data units; a second module configurable to perform traffic analysis based on the received data units; a third module configurable to perform load balancing based on the received data units; and a fourth module configurable to perform route lookups based on the received data units. | 11-22-2012 |
20130003726 | METHODS AND APPARATUS RELATED TO A FLEXIBLE DATA CENTER SECURITY ARCHITECTURE - In one embodiment, edge devices can be configured to be coupled to a multi-stage switch fabric and peripheral processing devices. The edge devices and the multi-stage switch fabric can collectively define a single logical entity. A first edge device from the edge devices can be configured to be coupled to a first peripheral processing device from the peripheral processing devices. The second edge device from the edge devices can be configured to be coupled to a second peripheral processing device from the peripheral processing devices. The first edge device can be configured such that virtual resources including a first virtual resource can be defined at the first peripheral processing device. A network management module coupled to the edge devices and configured to provision the virtual resources such that the first virtual resource can be migrated from the first peripheral processing device to the second peripheral processing device. | 01-03-2013 |
20130073931 | OPTIMIZATION OF PACKET BUFFER MEMORY UTILIZATION - A method performed by an I/O unit connected to another I/O unit in a network device. The method includes receiving a packet; segmenting the packet into a group of data blocks; storing the group of data blocks in a data memory; generating data protection information for a data block of the group of data blocks; creating a control block for the data block; storing, in a control memory, a group of data items for the control block, the group of data items including information associated with a location, of the data block, within the data memory and the data protection information for the data block; performing a data integrity check on the data block, using the data protection information, to determine whether the data block contains a data error; and outputting the data block when the data integrity check indicates that the data block does not contain a data error. | 03-21-2013 |
20130083691 | METHODS AND APPARATUS FOR A SELF-ORGANIZED LAYER-2 ENTERPRISE NETWORK ARCHITECTURE - In some embodiments, an apparatus includes a network node operatively coupled within a network. The network node is configured to send a first authentication message upon boot up, and receive, in response to the first authentication message, a second authentication message configured to be used to authenticate the network node. The network node is configured to send a first discovery message, and receive, based on the first discovery message, a second discovery message configured to be used by the network node to identify an address of the network node and an address of a core network node within the network. The network node is configured to set up a control-plane tunnel to the core network node based on the address of the network node and the address for the core network node and receive configuration information from the core network node through the control-plane tunnel. | 04-04-2013 |
20130083700 | METHODS AND APPARATUS FOR CENTRALIZED MANAGEMENT OF ACCESS AND AGGREGATION NETWORK INFRASTRUCTURE - In some embodiments, an apparatus comprises a core network node configured to be operatively coupled to a set of network nodes. The core network node is configured to define configuration information for a network node from the set of network nodes based on a template, where the configuration information excludes virtual local area network (VLAN) information or IP subnet information. The core network node is further configured to send the configuration information to the network node. | 04-04-2013 |
20130083724 | METHODS AND APPARATUS FOR A CONVERGED WIRED/WIRELESS ENTERPRISE NETWORK ARCHITECTURE - In some embodiments, an apparatus comprises a core network node and a control module within an enterprise network architecture. The core network node is configured to be operatively coupled to a set of wired network nodes and a set of wireless network nodes. The core network node is configured to receive a first tunneled packet associated with a first session from a wired network node from the set of wired network nodes. The core network node is configured to also receive a second tunneled packet associated with a second session from a wireless network node from the set of wireless network nodes through intervening wired network nodes from the set of wired network nodes. The control module is operatively coupled to the core network node. The control module is configured to manage the first session and the second session. | 04-04-2013 |
20130083725 | METHODS AND APPARATUS FOR ENFORCING A COMMON USER POLICY WITHIN A NETWORK - In some embodiments, an apparatus includes a core network node configured to be operatively coupled to a set of wired network nodes and a set of wireless network nodes. The core network node is configured to receive, at a first time, a first data packet to be sent to a wired device operatively coupled to a wired network node from the set of wired network nodes. The core network node is configured to also receive, at a second time, a second data packet to be sent to a wireless device operatively coupled to a wireless network node from the set of wireless network nodes. The core network node is configured to apply a common policy to the first data packet and the second data packet based on an identifier of a user associated with both the wireless device and the wired device. | 04-04-2013 |
20130083782 | METHODS AND APPARATUS FOR A SCALABLE NETWORK WITH EFFICIENT LINK UTILIZATION - In some embodiments, an apparatus comprises a core network node configured to be operatively coupled to a set of network nodes. The core network node is configured to receive a broadcast signal from a network node from the set of network nodes, which is originated from a host device operatively coupled to the network node. The broadcast signal is sent via a tunnel from the network node to the core network node, such that other network nodes that are not included in the tunnel do not receive the broadcast signal. The core network node is configured to retrieve control information associated with the broadcast signal without sending another broadcast signal, and then send the control information to the network node. | 04-04-2013 |
20130121343 | METHODS AND APPARATUS FOR TRANSMISSION OF GROUPS OF CELLS VIA A SWITCH FABRIC - In one embodiment, a method can include receiving at an egress schedule module a request to schedule transmission of a group of cells from an ingress queue through a switch fabric of a multi-stage switch. The ingress queue can be associated with an ingress stage of the multi-stage switch. The egress schedule module can be associated with an egress stage of the multi-stage switch. The method can also include determining, in response to the request, that an egress port at the egress stage of the multi-stage switch is available to transmit the group of cells from the multi-stage switch. | 05-16-2013 |
20130128734 | SYSTEMS AND METHODS FOR DROPPING DATA USING A DROP PROFILE - A system selectively drops data from queues. The system includes a drop table that stores drop probabilities. The system selects one of the queues to examine and generates an index into the drop table to identify one of the drop probabilities for the examined queue. The system then determines whether to drop data from the examined queue based on the identified drop probability. | 05-23-2013 |
20130230322 | MULTI-CHASSIS ROUTER WITH MULTIPLEXED OPTICAL INTERCONNECTS - A multi-chassis network device includes a plurality of nodes that operate as a single device within the network and a switch fabric that forwards data plane packets between the plurality of nodes. The switch fabric includes a set of multiplexed optical interconnects coupling the nodes. For example, a multi-chassis router includes a plurality of routing nodes that operate as a single router within a network and a switch fabric that forwards packets between the plurality of routing nodes. The switch fabric includes at least one multiplexed optical interconnect coupling the routing nodes. The nodes of the multi-chassis router may direct portions of the optical signal over the multiplexed optical interconnect to different each other using wave-division multiplexing. | 09-05-2013 |
20130258853 | SYSTEMS AND METHODS FOR SELECTIVELY PERFORMING EXPLICIT CONGESTION NOTIFICATION - A system provides congestion control and includes multiple queues that temporarily store data and a drop engine. The system associates a value with each of the queues, where each of the values relates to an amount of memory associated with the queue. The drop engine compares the value associated with a particular one of the queues to one or more programmable thresholds and selectively performs explicit congestion notification or packet dropping on data in the particular queue based on a result of the comparison. | 10-03-2013 |
20130308644 | FILTERING AND ROUTE LOOKUP IN A SWITCHING DEVICE - Methods and devices for processing packets are provided. The processing device may Include an input interface for receiving data units containing header information of respective packets; a first module configurable to perform packet filtering based on the received data units; a second module configurable to perform traffic analysis based on the received data units; a third module configurable to perform load balancing based on the received data units; and a fourth module configurable to perform route lookups based on the received data | 11-21-2013 |
20130315060 | METHODS AND APPARATUS FOR CONFIGURING A VIRTUAL NETWORK SWITCH - In one embodiment, a method includes sending a configuration signal to a virtual network switch module within a control plane of a communications network. The configuration signal is configured to define a first network rule at the virtual network switch module. The method also includes configuring a packet forwarding module such that the packet forwarding module implements a second network rule, and receiving status information from the virtual network switch module and status information from the packet forwarding module. The status information is received via the control plane. | 11-28-2013 |
20140086090 | DISTRIBUTED ADMISSION CONTROL - A first network client requests initiation of a data transfer with a second network client. An admission control facility (ACF) responds to the initiation request by performing admission analysis to determine whether to initiate the data transfer. The ACF sends one or more packets to the second network client. In response, the second network client sends acknowledgment packets back to the ACF. The ACF performs admission analysis based on the packets sent and the acknowledgment packets, and determines whether the data transfer should be initiated based on the analysis. The admission analysis may be based on a variety of factors, such as the average time to receive an acknowledgment for each packet, the variance of the time to receive an acknowledgment for each packet, a combination of these factors, or a combination of these and other factors. | 03-27-2014 |
20140160933 | SYSTEMS AND METHODS FOR DROPPING DATA USING A DROP PROFILE - A system selectively drops data from queues. The system includes a drop table that stores drop probabilities. The system selects one of the queues to examine and generates an index into the drop table to identify one of the drop probabilities for the examined queue. The system then determines whether to drop data from the examined queue based on the identified drop probability. | 06-12-2014 |
20140211615 | AGGREGATION NETWORK WITH CENTRALIZED CONTROL - An access network is described in which a centralized controller provides seamless end-to-end service from a core-facing edge of a service provider network through aggregation and access infrastructure out to access nodes located proximate the subscriber devices. The controller operates to provide a central configuration point for configuring aggregation nodes (AGs) of a network of the service provider so as to provide transport services to transport traffic between access nodes (AXs) and edge routers on opposite borders of the network. | 07-31-2014 |
20140212138 | OPTICAL ACCESS NETWORK HAVING EMITTER-FREE CUSTOMER PREMISE EQUIPMENT AND ADAPTIVE COMMUNICATION SCHEDULING - An access network includes an access device having an optical interface module that outputs a plurality of pairs of optical communication signals, each of the pairs of optical communication signals comprising a modulated optical transmit signal and an unmodulated optical receive signal, each of the pairs of optical communication signals having a different wavelength. A customer premise equipment (CPE) comprises an optical interface module to receive the modulated optical transmit signal and the unmodulated optical receive signal for any of the plurality of pairs of optical communication signals. The optical interface module includes a receive module to demodulate the modulated optical transmit signal into inbound symbols and a transmit module having an optical modulator and reflective optics to modulate the unmodulated optical receive signal in accordance with a data signal and reflect a modulated optical receive signal to communicate outbound data symbols to the access device. | 07-31-2014 |
20140348111 | METHODS AND APPARATUS FOR ENFORCING A COMMON USER POLICY WITHIN A NETWORK - In some embodiments, an apparatus includes a core network node configured to be operatively coupled to a set of wired network nodes and a set of wireless network nodes. The core network node is configured to receive, at a first time, a first data packet to be sent to a wired device operatively coupled to a wired network node from the set of wired network nodes. The core network node is configured to also receive, at a second time, a second data packet to be sent to a wireless device operatively coupled to a wireless network node from the set of wireless network nodes. The core network node is configured to apply a common policy to the first data packet and the second data packet based on an identifier of a user associated with both the wireless device and the wired device. | 11-27-2014 |