公开(公告)号：US08144715B2

公开(公告)日：2012-03-27

申请号：US12104598

申请日：2008-04-17

申请人： Hamid Ould Brahim ,  David Allan ,  Dinesh Mohan

发明人： Hamid Ould Brahim ,  David Allan ,  Dinesh Mohan

IPC分类号： H04L12/28

CPC分类号： H04L12/66 ,  H04L12/4633 ,  H04L12/465 ,  H04L12/4654 ,  H04L12/4658

摘要： To allow seamless interworking between an 802.1ah service instance (ISID) and a VPLS service instance, the AGI value used to signal the setup of the pseudowire portion of the VPLS may carry the ISID value of an associated 802.1ah service instance. This allows the service instance to be identified end-to-end across the Ethernet and VPLS networks using the same value without modifying how the MPLS network operates. The VPLS network will use AGI/AII signaling to set up pseudowires on the MPLS network, but instead of using an AGI value assigned by the MPLS network, the AGI value that is assigned will be taken from the ISID value of the Ethernet frame or from ISIDs registered by the Ethernet network. The AGI message may be given a new type value indicating that the AGI message carries a value that corresponds to the ISID value on an attached Ethernet network. Alternatively, an existing AGI message type may be used to carry the ISID value, and a second type field may be used to indicate that the AGI contains an ISID value.

摘要翻译： 为了允许802.1ah服务实例（ISID）和VPLS服务实例之间的无缝互通，用于发信号通知VPLS伪线部分的AGI值可以携带相关的802.1ah服务实例的ISID值。 这允许使用相同的值在跨越以太网和VPLS网络的端到端地识别服务实例，而无需修改MPLS网络如何工作。 VPLS网络将使用AGI / AII信令在MPLS网络上建立伪线，而不是使用由MPLS网络分配的AGI值，所分配的AGI值将取自以太网帧的ISID值或从 以太网注册的ISID。 AGI消息可以被给予新的类型值，指示AGI消息携带对应于所连接的以太网上的ISID值的值。 或者，可以使用现有的AGI消息类型来携带ISID值，并且可以使用第二类型字段来指示AGI包含ISID值。

公开(公告)号：US20090041023A1

公开(公告)日：2009-02-12

申请号：US12104598

申请日：2008-04-17

申请人： Hamid Ould Brahim ,  David Allan ,  Dinesh Mohan

发明人： Hamid Ould Brahim ,  David Allan ,  Dinesh Mohan

IPC分类号： H04L12/56

CPC分类号： H04L12/66 ,  H04L12/4633 ,  H04L12/465 ,  H04L12/4654 ,  H04L12/4658

摘要： To allow seamless interworking between an 802.1ah service instance (ISID) and a VPLS service instance, the AGI value used to signal the setup of the pseudowire portion of the VPLS may carry the ISID value of an associated 802.1ah service instance. This allows the service instance to be identified end-to-end across the Ethernet and VPLS networks using the same value without modifying how the MPLS network operates. The VPLS network will use AGI/AII signaling to set up pseudowires on the MPLS network, but instead of using an AGI value assigned by the MPLS network, the AGI value that is assigned will be taken from the ISID value of the Ethernet frame or from ISIDs registered by the Ethernet network. The AGI message may be given a new type value indicating that the AGI message carries a value that corresponds to the ISID value on an attached Ethernet network. Alternatively, an existing AGI message type may be used to carry the ISID value, and a second type field may be used to indicate that the AGI contains an ISID value.

摘要翻译： 为了允许802.1ah服务实例（ISID）和VPLS服务实例之间的无缝互通，用于发信号通知VPLS伪线部分的AGI值可以携带相关的802.1ah服务实例的ISID值。 这允许使用相同的值在跨越以太网和VPLS网络的端到端地识别服务实例，而无需修改MPLS网络如何工作。 VPLS网络将使用AGI / AII信令在MPLS网络上建立伪线，而不是使用由MPLS网络分配的AGI值，所分配的AGI值将取自以太网帧的ISID值或从 以太网注册的ISID。 AGI消息可以被给予新的类型值，指示AGI消息携带对应于所连接的以太网上的ISID值的值。 或者，可以使用现有的AGI消息类型来携带ISID值，并且可以使用第二类型字段来指示AGI包含ISID值。

公开(公告)号：US20080219172A1

公开(公告)日：2008-09-11

申请号：US11996561

申请日：2006-09-12

申请人： Dinesh Mohan ,  David Allan

发明人： Dinesh Mohan ,  David Allan

IPC分类号： G06F11/00

CPC分类号： H04L43/00 ,  H04L12/4625 ,  H04L41/046 ,  H04L41/0893 ,  H04L43/0811

摘要： Described is a process and system for providing an extensible forwarding plane data communications channel adapted to selectively support operations, administration and maintenance (OAM) activity within one or more different domains of an Ethernet transport network. The data communication channel is established using Ethernet protocol data units forwarded within the forwarding plane, between network elements. The Ethernet protocol data units can be Ethernet OAM frames modified to include an OpCode indicative of a maintenance communication channel. The OAM frames are generated at a selected one of the network elements (source), forwarded along the same network path as the Ethernet frames, and terminate at another network element (destination) associated with a maintenance level identified within the OAM frame. The source and destination network elements can reside on a domain boundary using the Ethernet OAM frames flowing therebetween to relay maintenance communications channel messages.

摘要翻译： 描述了用于提供可扩展的转发平面数据通信信道的过程和系统，其适于选择性地支持以太网传输网络的一个或多个不同域内的操作，管理和维护（OAM）活动。 使用在转发平面内转发的以太网协议数据单元在网元之间建立数据通信信道。 以太网协议数据单元可以是修改为包括指示维护通信信道的OpCode的以太网OAM帧。 在所选网络元件（源）中生成OAM帧，其沿着与以太网帧相同的网络路径转发，并终止于与OAM帧内识别的维护级别相关联的另一网络元件（目的地）。 源和目标网元可以使用在其间流动的以太网OAM帧来驻留在域边界上，以中继维护通信信道消息。

公开(公告)号：US20110058483A1

公开(公告)日：2011-03-10

申请号：US12886630

申请日：2010-09-21

申请人： Dinesh Mohan ,  David Allan

发明人： Dinesh Mohan ,  David Allan

IPC分类号： H04L12/26

CPC分类号： H04L43/00 ,  H04L12/4625 ,  H04L41/046 ,  H04L41/0893 ,  H04L43/0811

摘要： Described is a process and system for providing an extensible forwarding plane data communications channel adapted to selectively support operations, administration and maintenance (OAM) activity within one or more different domains of an Ethernet transport network. The data communication channel is established using Ethernet protocol data units forwarded within the forwarding plane, between network elements. The Ethernet protocol data units can be Ethernet OAM frames modified to include an OpCode indicative of a maintenance communication channel. The OAM frames are generated at a selected one of the network elements (source), forwarded along the same network path as the Ethernet frames, and terminate at another network element (destination) associated with a maintenance level identified within the OAM frame. The source and destination network elements can reside on a domain boundary using the Ethernet OAM frames flowing therebetween to relay maintenance communications channel messages.

摘要翻译： 描述了用于提供可扩展的转发平面数据通信信道的过程和系统，其适于选择性地支持以太网传输网络的一个或多个不同域内的操作，管理和维护（OAM）活动。 使用在转发平面内转发的以太网协议数据单元在网元之间建立数据通信信道。 以太网协议数据单元可以是修改为包括指示维护通信信道的OpCode的以太网OAM帧。 在所选网络元件（源）中生成OAM帧，其沿着与以太网帧相同的网络路径转发，并终止于与OAM帧内识别的维护级别相关联的另一网络元件（目的地）。 源和目标网元可以使用在其间流动的以太网OAM帧来驻留在域边界上，以中继维护通信信道消息。

公开(公告)号：US07821949B2

公开(公告)日：2010-10-26

申请号：US11996561

申请日：2006-09-12

申请人： Dinesh Mohan ,  David Allan

发明人： Dinesh Mohan ,  David Allan

IPC分类号： G06F11/00

CPC分类号： H04L43/00 ,  H04L12/4625 ,  H04L41/046 ,  H04L41/0893 ,  H04L43/0811

摘要： Described is a process and system for providing an extensible forwarding plane data communications channel adapted to selectively support operations, administration and maintenance (OAM) activity within one or more different domains of an Ethernet transport network. The data communication channel is established using Ethernet protocol data units forwarded within the forwarding plane, between network elements. The Ethernet protocol data units can be Ethernet OAM frames modified to include an OpCode indicative of a maintenance communication channel. The OAM frames are generated at a selected one of the network elements (source), forwarded along the same network path as the Ethernet frames, and terminate at another network element (destination) associated with a maintenance level identified within the OAM frame. The source and destination network elements can reside on a domain boundary using the Ethernet OAM frames flowing therebetween to relay maintenance communications channel messages.

摘要翻译： 描述了用于提供可扩展的转发平面数据通信信道的过程和系统，其适于选择性地支持以太网传输网络的一个或多个不同域内的操作，管理和维护（OAM）活动。 使用在转发平面内转发的以太网协议数据单元在网元之间建立数据通信信道。 以太网协议数据单元可以是修改为包括指示维护通信信道的OpCode的以太网OAM帧。 在所选网络元件（源）中生成OAM帧，其沿着与以太网帧相同的网络路径转发，并终止于与OAM帧内识别的维护级别相关联的另一网络元件（目的地）。 源和目标网元可以使用在其间流动的以太网OAM帧来驻留在域边界上，以中继维护通信信道消息。

公开(公告)号：US09444720B2

公开(公告)日：2016-09-13

申请号：US12435973

申请日：2009-05-05

申请人： David Allan ,  Nigel Bragg ,  Jerome Chiabaut

发明人： David Allan ,  Nigel Bragg ,  Jerome Chiabaut

IPC分类号： H04L12/701 ,  H04L12/721 ,  H04L12/761 ,  H04L12/18 ,  H04L12/46

CPC分类号： H04L45/12 ,  H04L12/185 ,  H04L12/4641 ,  H04L45/00 ,  H04L45/16 ,  H04L45/66 ,  H04L67/1044 ,  H04L67/1046 ,  H04N1/333

摘要： Interest in multicast group membership may be advertised via a routing system on an Ethernet network along with an indication of an algorithm to be used by the nodes on the network to calculate the distribution tree or trees for the multicast. Each node, upon receipt of the advertisement, will determine the algorithm that is to be used to produce the multicast tree and will use the algorithm to calculate whether it is on a path between nodes advertising common interest in the multicast. Example algorithms may include shortest path algorithms and spanning tree algorithms. This allows multicast membership to be managed via the routing control plane, while enabling spanning tree processes to be used to forward multicast traffic. Since spanning tree is able to install multicast state per service rather than per source per service, this reduces the amount of forwarding state required to implement multicasts on the routed Ethernet mesh network.

摘要翻译： 可以通过以太网网络上的路由系统以及由网络上的节点使用的算法的指示来广播对组播组成员的兴趣，以计算组播的分布树或树。 每个节点在接收到广告时将确定要用于生成多播树的算法，并且将使用该算法来计算是否在节点之间的路径上，广播广播上的共同兴趣。 示例算法可以包括最短路径算法和生成树算法。 这允许通过路由控制平面管理多播成员资格，同时使用生成树进程来转发组播流量。 由于生成树能够按服务安装多播状态，而不是每个服务的每个源，因此减少了在路由以太网网络上实现组播所需的转发状态量。

公开(公告)号：US09100269B2

公开(公告)日：2015-08-04

申请号：US12259560

申请日：2008-10-28

申请人： David Allan ,  Nigel Bragg ,  Hadi Nasrallah ,  Preben Hunnerup

发明人： David Allan ,  Nigel Bragg ,  Hadi Nasrallah ,  Preben Hunnerup

IPC分类号： G01R31/08 ,  H04L12/701 ,  H04L12/707 ,  H04L12/703 ,  H04L12/24

CPC分类号： H04L45/00 ,  H04L41/0663 ,  H04L45/22 ,  H04L45/28

摘要： A method of managing traffic flow in a packet network. A working sub-network is provided, which comprises one or more provisioned static working paths between at least one source node and one or more destination nodes in the network, and the working sub-network with a service instance. A backup sub-network is provided, which comprises one or more dynamic protection paths between the at least one source node and the one or more destination nodes, and the backup sub-network associated with the service instance. During a normal operation of the network, forwarding subscriber traffic associated with the service instance through the network using the working sub-network. Following detection of a network failure affecting the service instance, the subscriber traffic associated with the service instance is switched for forwarding through the network using the backup sub-network.

摘要翻译： 一种在分组网络中管理业务流的方法。 提供了一个工作子网络，其包括在至少一个源节点和网络中的一个或多个目的地节点之间的一个或多个所提供的静态工作路径，以及具有服务实例的工作子网。 提供备份子网络，其包括所述至少一个源节点和所述一个或多个目的地节点之间的一个或多个动态保护路径以及与所述服务实例相关联的备份子网络。 在网络的正常运行期间，通过使用工作子网络的网络转发与服务实例相关联的用户流量。 在检测到影响服务实例的网络故障之后，与服务实例相关联的用户流量被切换以通过使用备份子网络的网络进行转发。

公开(公告)号：US08649259B2

公开(公告)日：2014-02-11

申请号：US13471712

申请日：2012-05-15

申请人： David Allan ,  Peter Ashwood-Smith

发明人： David Allan ,  Peter Ashwood-Smith

IPC分类号： G01R31/08

CPC分类号： H04L12/437 ,  A61K31/337 ,  A61K33/00 ,  A61K47/12 ,  H04L41/0668 ,  H04L41/0672 ,  H04L45/28 ,  H04L45/66 ,  H04L49/351 ,  H04L49/70

摘要： A ring control protocol is used to establish a separate control plane for a plurality of physically dual homed devices to enable collections of dual homed devices to be represented by a single pair of addresses into the attached routed Ethernet network. The gateway devices analyze the passing ring control packets to create direct mappings for data packets to the routed Ethernet network. Thus, although the dual homed devices are treated as a ring from a control perspective, the data path is implemented to be direct so that data packets continue to flow directly from the dual homed devices to each of the attached gateway devices. In one embodiment, each of the gateway devices implements a virtual switch and advertises the MAC address of the virtual switch into the routed Ethernet network rather than the MAC addresses of each of the attached Ethernet Switch Units.

摘要翻译： 环控制协议用于为多个物理双重归属设备建立单独的控制平面，以使得双归属设备的集合可以由连接的路由以太网中的单对地址表示。 网关设备分析通过的环控制数据包，以创建到路由以太网的数据包的直接映射。 因此，虽然从控制角度将双重归属设备视为环，但是数据路径被实现为直接的，使得数据分组继续直接从双归属设备流向每个附接的网关设备。 在一个实施例中，每个网关设备实现虚拟交换机，并且将虚拟交换机的MAC地址通告给路由的以太网，而不是每个连接的以太网交换机单元的MAC地址。

公开(公告)号：US20120230183A1

公开(公告)日：2012-09-13

申请号：US13471712

申请日：2012-05-15

申请人： David Allan ,  Peter Ashwood-Smith

发明人： David Allan ,  Peter Ashwood-Smith

IPC分类号： H04L12/42 ,  H04L12/437

CPC分类号： H04L12/437 ,  A61K31/337 ,  A61K33/00 ,  A61K47/12 ,  H04L41/0668 ,  H04L41/0672 ,  H04L45/28 ,  H04L45/66 ,  H04L49/351 ,  H04L49/70

摘要： A ring control protocol is used to establish a separate control plane for a plurality of physically dual homed devices to enable collections of dual homed devices to be represented by a single pair of addresses into the attached routed Ethernet network. The gateway devices analyze the passing ring control packets to create direct mappings for data packets to the routed Ethernet network. Thus, although the dual homed devices are treated as a ring from a control perspective, the data path is implemented to be direct so that data packets continue to flow directly from the dual homed devices to each of the attached gateway devices. In one embodiment, each of the gateway devices implements a virtual switch and advertises the MAC address of the virtual switch into the routed Ethernet network rather than the MAC addresses of each of the attached Ethernet Switch Units.

摘要翻译： 环控制协议用于为多个物理双重归属设备建立单独的控制平面，以使得双归属设备的集合可以由连接的路由以太网中的单对地址表示。 网关设备分析通过的环控制数据包，以创建到路由以太网的数据包的直接映射。 因此，虽然从控制角度将双重归属设备视为环，但是数据路径被实现为直接的，使得数据分组继续直接从双归属设备流向每个附接的网关设备。 在一个实施例中，每个网关设备实现虚拟交换机，并且将虚拟交换机的MAC地址通告给路由的以太网，而不是每个连接的以太网交换机单元的MAC地址。

公开(公告)号：US08005081B2

公开(公告)日：2011-08-23

申请号：US11962476

申请日：2007-12-21

申请人： Nigel Bragg ,  David Allan ,  Simon Parry ,  Robert Friskney ,  Simon Brueckheimer

发明人： Nigel Bragg ,  David Allan ,  Simon Parry ,  Robert Friskney ,  Simon Brueckheimer

IPC分类号： H04L12/28

CPC分类号： H04L12/4641 ,  H04L12/462 ,  H04L12/4654 ,  H04L12/4658 ,  H04L12/4662 ,  H04L41/12 ,  H04L43/50 ,  H04L45/745

摘要： An Ethernet network comprises nodes which support a plurality of different forwarding modes. A range of VLAN Identifiers (VIDs) are allocated to each of the forwarding modes. Connections are configured between a source node and a destination node of the network using different forwarding modes. Packets carrying data traffic are sent to the destination node by selectively setting a VID in a packet to a first value, to transfer a packet via a first connection and a first forwarding mode, and a second value to transfer a packet via the second connection and the second forwarding mode. Packets received from both of the connections and sent on to an end-user. VLAN Identifiers can be allocated to different releases of functionality at nodes (e.g. software releases) such that packets are forwarded via a set of nodes supporting a first release, or via a set of nodes supporting a second release. It is possible to provide a controlled and disruption-free network evolution.

摘要翻译： 以太网网络包括支持多个不同转发模式的节点。 每个转发模式都分配了一系列VLAN标识符（VID）。 使用不同的转发模式在网络的源节点和目的节点之间配置连接。 通过选择性地将分组中的VID设置为第一值，通过第一连接和第一转发模式传送分组，以及通过第二连接传送分组的第二值，将携带数据业务的分组发送到目的地节点， 第二转发模式。 从两个连接接收到的数据包发送给最终用户。 VLAN标识符可以被分配给节点（例如，软件版本）上的不同版本的功能，使得分组经由支持第一版本的一组节点或经由支持第二版本的一组节点转发。 可以提供受控和无中断的网络演进。