公开(公告)号：EP2351294A4

公开(公告)日：2013-12-04

申请号：EP09828494

申请日：2009-11-30

申请人： NORTEL NETWORKS LTD

发明人： MARTIN DAVID ,  HOLNESS MARC ,  ST-DENIS BERNARD

IPC分类号： H04L12/24 ,  H04L12/46 ,  H04L12/701 ,  H04L12/801 ,  H04L29/06

CPC分类号： H04L47/10 ,  H04L12/4662 ,  H04L45/00 ,  H04L45/28 ,  H04L47/245 ,  H04L47/728 ,  H04L47/746 ,  H04L49/557

摘要： A method of controlling traffic forwarding in a Provider Backbone-Traffic Engineered (PBB-TE) network. A protection group (PG) is defined, and including N working Traffic Engineered Service Instances (TESIs) and M protection TESIs. An Automatic Protection Switching Protocol Data Unit (APS PDU) is defined, which includes information defining at least a state of the protection group. This APS PDU is forwarded only through the protection TESI(s).

公开(公告)号：EP2643940A1

公开(公告)日：2013-10-02

申请号：EP11843451.3

申请日：2011-11-22

申请人： Force 10 Networks, Inc.

发明人： KHETAN, Vikas ,  SHETTY, Hitha

IPC分类号： H04L1/00

CPC分类号： H04L45/00 ,  H04L12/4641 ,  H04L49/3009 ,  H04L49/354 ,  H04L49/555 ,  H04L49/557

摘要： A packet network device includes a control module, one or more line cards each one or which includes a plurality of ingress and egress ports, and each of the ingress and egress ports are connected to external network links. The line cards maintain forwarding tables and include functionality that employs information in the forwarding tables to determine how incoming packets of information should be forwarded. The control module includes functionality that operates to learn reachability information about other devices connected to the network that are and to use this reachability information to update forwarding tables maintained on the line cards. The control module also includes an enhance ARP functionality that operates in cooperation with standard ARP functionality and other network protocols included on the control module to diminish the amount of data lost in the event that a link connected to one of the egress ports fails.

公开(公告)号：EP2237531B1

公开(公告)日：2013-05-08

申请号：EP09156939.2

申请日：2009-03-31

申请人： Sony Corporation

发明人： Jerye, Matthias

IPC分类号： H04L29/12 ,  H04L12/28

CPC分类号： H04L61/2046 ,  H04L29/12216 ,  H04L29/12254 ,  H04L29/12264 ,  H04L49/557 ,  H04L61/2007 ,  H04L61/2038 ,  H04N21/43615 ,  H04N21/6402

公开(公告)号：EP2252015B1

公开(公告)日：2012-09-26

申请号：EP10162775.0

申请日：2010-05-13

申请人： Avaya Inc.

发明人： Assarpour, Hamid

IPC分类号： H04L12/56 ,  H04L12/437

CPC分类号： H04L45/00 ,  H04L12/437 ,  H04L45/245 ,  H04L45/28 ,  H04L49/557 ,  Y02D50/30

摘要： A method, apparatus and computer program product for providing fast reroute of a packet that may be forwarded on one of a plurality of Equal Cost Multi Path (ECMP) routes through a network is presented. A packet is received by a Forwarding Data Unit (FDU) in a data plane of a network element. The unicast packet is routed at L3, and ECMP is enabled for a next hop for the unicast packet. An ECMP route is selected for forwarding the packet to a destination port. A lookup is performed in a port state table maintained by the FDU to determine an available local port for said ECMP route that is in an UP state for the destination, and if no local port is UP, then a lookup is performed in the port state table to determine an available remote port that is in an UP state for the selected ECMP route.

公开(公告)号：EP2465233A2

公开(公告)日：2012-06-20

申请号：EP10808615.8

申请日：2010-08-10

申请人： Google Inc.

发明人： ZHOU, Junlan ,  JI, Zhengrong ,  WU, Yuguang

IPC分类号： H04L12/56 ,  H04L12/28

CPC分类号： H04L49/557 ,  H04L45/04 ,  H04L45/28 ,  H04L45/60 ,  H04L49/555

摘要： A system for maintaining routing capabilities in a router having a failed control plane provides an active control plane in the router in communication with at least one external node, the active control plane running at least one routing process. A backup control plane may be interconnected with the active control plane, so that the active control plane may periodically transmit synchronization signals to the backup control plane. The backup control plane may update its state based on these synchronization signals. Moreover, the backup control plane may be programmed to take over the routing process of the active control plane if the active control plane fails.

公开(公告)号：EP2252015A1

公开(公告)日：2010-11-17

申请号：EP10162775.0

申请日：2010-05-13

申请人： Avaya Inc.

发明人： Assarpour, Hamid

IPC分类号： H04L12/56 ,  H04L12/437

CPC分类号： H04L45/00 ,  H04L12/437 ,  H04L45/245 ,  H04L45/28 ,  H04L49/557 ,  Y02D50/30

摘要： A method, apparatus and computer program product for providing fast reroute of a packet that may be forwarded on one of a plurality of Equal Cost Multi Path (ECMP) routes through a network is presented. A packet is received by a Forwarding Data Unit (FDU) in a data plane of a network element. The unicast packet is routed at L3, and ECMP is enabled for a next hop for the unicast packet. An ECMP route is selected for forwarding the packet to a destination port. A lookup is performed in a port state table maintained by the FDU to determine an available local port for said ECMP route that is in an UP state for the destination, and if no local port is UP, then a lookup is performed in the port state table to determine an available remote port that is in an UP state for the selected ECMP route.

摘要翻译： 用于提供几乎重新路由分组的方法，装置和计算机程序产品也可以在等价多路径（ECMP）路由的多个一个通过网络呈现被转发。 的数据包被通过一个转发数据单元（FDU）中的网络元件的数据平面接收。 单播分组在L3被路由，并且ECMP为用于单播数据包的下一跳启用。 上被选择ECMP路径的分组转发到目的地端口。一个查找在UP状态下执行在由FDU保持确定性矿可用的本地端口用于所述ECMP路由的端口状态表所做的是在为目标，并且如果没有 将localPort是UP，然后查找在端口状态表执行上可用远程端口确定性矿确实是达到国家所选择的等价路由。

公开(公告)号：EP2252014A1

公开(公告)日：2010-11-17

申请号：EP10162774.3

申请日：2010-05-13

申请人： Avaya Inc.

发明人： Assarpour , Hamid

IPC分类号： H04L12/56

CPC分类号： H04L45/00 ,  H04L45/24 ,  H04L45/245 ,  H04L45/28 ,  H04L45/58 ,  H04L49/557 ,  Y02D50/30

摘要： A method, apparatus and computer program product for providing fast reroute of a packet is presented. A unicast packet is received by an FDU in a data plane of a network element and a destination is determined for the packet. A lookup is performed in a port state table maintained by the FDU to determine an available local port that is in an UP state for the destination, and if no local port is UP, then a lookup is performed in the port state table to determine an available remote port that is in an UP state for the destination. If a port in the UP state cannot be determined for the unicast packet, then the packet is dropped.

摘要翻译： 用于提供几乎重新路由分组的方法，装置和计算机程序产品被呈现。 单播分组是通过在FDU在网络元件中的一个数据平面接收和目的地为确定性的开采该分组。 一个查找在由FDU保持确定性矿可用的本地端口的端口状态表执行所做的是在UP状态为目标，如果没有本地端口是UP，然后查找在端口状态表进行确定性的矿 可用的远程端口确实是在UP状态为目标。 如果在处于UP状态的端口不能确定性开采所述单播分组，则该分组被丢弃。

公开(公告)号：EP2252013A1

公开(公告)日：2010-11-17

申请号：EP10162773.5

申请日：2010-05-13

申请人： Avaya Inc.

发明人： Assarpour, Hamid

IPC分类号： H04L12/56

CPC分类号： H04L45/245 ,  H04L45/00 ,  H04L45/28 ,  H04L45/58 ,  H04L49/30 ,  H04L49/557 ,  Y02D50/30

摘要： A method, apparatus and computer program product for maintaining port state tables in a forwarding plane of a network element are presented. The state of a first set of ports associated with a first Forwarding Data Unit (FDU) are periodically determined, the first FDU being one of a plurality of FDUs. The determined state is used to update a first port state table of the port state database associated with the first FDU. The determined state is transmitted to each other FDUs on the network element to enable each of the other FDUs to store the state of the first set of ports in a port state database local to each of the other FDUs. The port state database is used by the forwarding plane to perform fast reroute of packets.

摘要翻译： 为了保持在网络元件中的转发平面端口状态表的方法，装置和计算机程序产品被呈现。 的第一组与第一转发数据单元（FDU）相关联的端口的状态是周期性开采确定性，第一FDU是FDUS的多个之一。 确定性开采状态被用于更新与所述第一FDU相关联的端口状态数据库的第一端口状态表中。 确定性开采状态反mitted海誓山盟FDUS网络元件上，以使每个其它FDUS的第一组端口中的状态存储在一个端口状态数据库本地到每个其他FDUS的。 端口状态数据库用于由转发平面以执行几乎分组的重新路由。

公开(公告)号：EP2252012A1

公开(公告)日：2010-11-17

申请号：EP10162772.7

申请日：2010-05-13

申请人： Avaya Inc.

发明人： Assarpour, Hamid

IPC分类号： H04L12/56

CPC分类号： H04L45/00 ,  H04L45/16 ,  H04L45/24 ,  H04L45/245 ,  H04L45/28 ,  H04L49/201 ,  H04L49/557 ,  Y02D50/30

摘要： A method, apparatus and computer program product for providing a fast re-route of a multicast packet within a network element to an available port associated with a multi-link trunk is presented. A packet is received by a Forwarding Data Unit (FDU) in a data plane of a network element and a determination made that the packet is a multicast packet. The packet is forwarded to all egress FDUs having at least one port associated with at least one receiver of the multicast packet. A lookup is performed by each egress FDU in a synchronized local port state database to find a port for each receiver that is in an UP state. The packet is forwarded out the port to a receiver when the port is in the UP state and dropped when the port is in the DOWN state.

摘要翻译： 用于在与一个多链路中继相关联的可用端口的网络单元内提供多播分组的近重新路由的方法，装置和计算机程序产品被呈现。 的数据包被通过一个转发数据单元（FDU）中的网络元件的数据平面接收和做出的确定做了分组是多播数据包。 的分组被转发到具有与所述多播分组中的至少一个接收器关联的至少一个端口的所有出口FDUS。 一个查找由每个出口FDU在同步本地端口状态数据库进行查找每个接收端口所做的是在UP状态。 分组被转发出端口到接收器当端口处于UP状态和下降当端口处于DOWN状态。

公开(公告)号：EP2241037A2

公开(公告)日：2010-10-20

申请号：EP08863874.7

申请日：2008-12-16

申请人： Alcatel Lucent

发明人： SAHA, Kajal

IPC分类号： H04J3/08 ,  H04L12/56

CPC分类号： H04L45/22 ,  H04L1/1642 ,  H04L45/00 ,  H04L45/24 ,  H04L45/28 ,  H04L45/586 ,  H04L49/557

摘要： A system and method for resilient communication services under multi-chassis APS protected routers, including one or more of the following: an add-drop multiplexer; a working chassis; a plurality of working lines of communication between the add-drop multiplexer and the working chassis; a protection chassis; a plurality of protection lines of communication between the add-drop multiplexer and the protection chassis; and a multi-chassis APS control link between the working chassis and the protection chassis, wherein a plurality of active entities in the working chassis having state information send their state information to parallel inactive entities in the protection chassis by way of the multi-chassis APS, ones of said active entities send changed state information to parallel ones of said inactive entities through said multi-chassis APS control link upon a state change in said ones of said active entities, and ones of said inactive entities that were down request current state information from said active entities through said multi-chassis APS control link when said ones of said inactive entities that were down come back up after being down.