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1. 发明申请

US20060090008A1 Pseudowire termination directly on a router 有权
公开(公告)号：US20060090008A1
公开(公告)日：2006-04-27
申请号：US10970014
申请日：2004-10-21
申请人： Jim Guichard , Mohammed Sayeed , Bertrand Duvivier , Daniel Tappan
发明人： Jim Guichard , Mohammed Sayeed , Bertrand Duvivier , Daniel Tappan
IPC分类号： G06F15/16
CPC分类号： H04L12/4633
摘要： A method, apparatus and computer program product for routing data within a packet-switched network using a PW wherein the PW is terminated directly on the layer-3 routing device such that certain services and applications can be utilized is presented. The method, apparatus and computer program product receives an encapsulated layer-2 Protocol Data Unit (PDU) from a pseudowire emulating a service. The encapsulation is removed from the encapsulated layer-2 PDU and a layer-2 circuit associated with the pseudowire is terminated. The circuit is treated as an interface and the PDU is forwarded based on upper layer protocol information within the PDU.

2. 发明授权

US08824334B2 Dynamic shared risk node group (SRNG) membership discovery 有权
标题翻译：动态共享风险节点组（SRNG）成员资格发现
公开(公告)号：US08824334B2
公开(公告)日：2014-09-02
申请号：US13350356
申请日：2012-01-13
申请人： Jean-Philippe Vasseur , Jim Guichard , Robert Marcin Raszuk
发明人： Jean-Philippe Vasseur , Jim Guichard , Robert Marcin Raszuk
IPC分类号： H04L12/28
CPC分类号： H04L45/04 , H04L45/02 , H04L45/28
摘要： In one embodiment, a network device determines identities of each peer device in a second routing domain attached to edge devices in a first routing domain. The network device associates each address prefix reachable in the second routing domain with an identity of each peer device in the second routing domain that advertised the address prefix and with an identity of one or more edge devices in the first routing domain to which that peer device is attached. The network device determines an address prefix is associated with a same identity of a peer device in the second routing domain but with different edge devices in the first routing domain. The network device assigns the different edge devices in the first routing domain associated with the determined address prefix to a shared risk node group (SRNG).
摘要翻译：在一个实施例中，网络设备确定连接到第一路由域中的边缘设备的第二路由域中的每个对等设备的身份。网络设备将第二路由域中可达到的每个地址前缀与第二路由域中的每个对等设备的标识相关联，该第二路由域中的每个对等体设备通告地址前缀，并且与该对等设备的第一路由域中的一个或多个边缘设备的标识被附上。网络设备确定地址前缀与第二路由域中的对等设备的相同标识相关联，但与第一路由域中的不同边缘设备相关联。网络设备将与确定的地址前缀相关联的第一路由域中的不同边缘设备分配给共享风险节点组（SRNG）。

3. 发明授权

US07983153B2 Fast reroute (FRR) protection at the edge of a RFC 2547 network 有权
标题翻译：在RFC 2547网络边缘的快速重路由（FRR）保护
公开(公告)号：US07983153B2
公开(公告)日：2011-07-19
申请号：US12481411
申请日：2009-06-09
申请人： Clarence Filsfils , Stefano B. Previdi , John Galen Scudder , David D. Ward , Jean-Philippe Vasseur , Jim Guichard
发明人： Clarence Filsfils , Stefano B. Previdi , John Galen Scudder , David D. Ward , Jean-Philippe Vasseur , Jim Guichard
IPC分类号： H04J1/16 , H04J3/14 , H04L1/00 , H04L12/26
CPC分类号： H04L45/28 , H04L45/02 , H04L45/04 , H04L45/22 , H04L45/50
摘要： In one embodiment, an edge device in a first routing domain is configured to communicate with a second routing domain via a data link. The edge device receives a data packet containing a destination address that is reachable via the second routing domain and an indication that the data packet is a protected packet that was previously rerouted from another edge device in the first routing domain via a Multi-Protocol Label Switching (MPLS) Fast Reroute (FRR) backup path. The edge device determines if communication with the second routing domain is still available via the data link, and if so, removes the indication that the data packet is a protected packet and forwards the data packet to the second routing domain, and, if not, drops the data packet to prevent the data packet from being rerouted a second time in the first routing domain on another MPLS FRR backup path.
摘要翻译：在一个实施例中，第一路由域中的边缘设备被配置为经由数据链路与第二路由域进行通信。边缘设备接收包含经由第二路由域可到达的目的地地址的数据分组，以及指示数据分组是先前通过多协议标签交换在第一路由域中从另一边缘设备重新路由的受保护分组的指示（MPLS）快速重路由（FRR）备份路径。边缘设备确定与第二路由域的通信是否仍然通过数据链路可用，如果是，则删除数据分组是受保护分组的指示，并将数据分组转发到第二路由域，如果不是，删除数据包，以防止数据包在另一个MPLS FRR备份路径上的第一个路由域再次被重新路由。

4. 发明申请

US20110142046A1 Selective label retention in a label switching network 有权
标题翻译：标签交换网络中的选择性标签保留
公开(公告)号：US20110142046A1
公开(公告)日：2011-06-16
申请号：US12653691
申请日：2009-12-16
申请人： Jim Guichard , Eric Rosen , Syed Kamran Raza
发明人： Jim Guichard , Eric Rosen , Syed Kamran Raza
IPC分类号： H04L12/56
CPC分类号： H04L29/0653 , H04L12/66 , H04L45/04 , H04L45/50 , H04L2012/5652
摘要： In one embodiment, a method includes receiving from a label distribution peer, a prefix/FEC to label mapping at a network device and processing the prefix/FEC to label mapping at the network device, wherein processing includes determining if a next hop interface of the prefix/FEC is in a same area as a link between the network device and the label distribution peer. The method further includes retaining the prefix/FEC to label mapping if the label distribution peer is a next hop for the prefix/FEC and if the next hop interface of the prefix/FEC is in the same area as the link between the network device and the label distribution peer, otherwise discarding the prefix/FEC to label mapping. An apparatus is also disclosed.
摘要翻译：在一个实施例中，一种方法包括从标签分发对等体接收前缀/ FEC以在网络设备处进行标签映射，以及处理前缀/ FEC以在网络设备处进行标签映射，其中处理包括确定是否下一跳接口前缀/ FEC与网络设备和标签分发对等体之间的链路在同一区域。如果标签分发对等体是前缀/ FEC的下一跳，并且前缀/ FEC的下一跳接口与网络设备与网络设备之间的链路在同一区域，则该方法还包括将前缀/ FEC保留到标签映射标签分发对等体，否则丢弃前缀/ FEC进行标签映射。还公开了一种装置。

5. 发明授权

US07961600B2 Loop prevention technique for MPLS using service labels 有权
标题翻译：使用服务标签的MPLS环路防护技术
公开(公告)号：US07961600B2
公开(公告)日：2011-06-14
申请号：US12694038
申请日：2010-01-26
申请人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
发明人： Clarence Filsfils , David D. Ward , Stefano B. Previdi , Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
IPC分类号： H04L12/26
CPC分类号： H04L45/18 , H04L45/04 , H04L45/22 , H04L45/28 , H04L45/50
摘要： In one embodiment, a loss of communication is detected between a first edge device of a computer network and a neighboring routing domain. A data packet is received at the first edge device, where the received data packet contains a destination address that is reachable via the neighboring routing domain. A determination is made whether a service label is located in a Multi-Protocol Label Switching (MPLS) label stack included in the received data packet. A service label in the MPLS label stack indicates that the received data packet was previously rerouted in accordance with fast reroute (FRR) operations. In response to a determination that the received data packet does not include a service label in the MPLS label stack, the received data packet is rerouted to a second edge device of the computer network for forwarding to the neighboring routing domain.
摘要翻译：在一个实施例中，在计算机网络的第一边缘设备和相邻路由域之间检测到通信丢失。在第一边缘设备处接收数据分组，其中所接收的数据分组包含经由相邻路由域可到达的目的地地址。确定服务标签是否位于包含在所接收的数据分组中的多协议标签交换（MPLS）标签栈中。 MPLS标签堆栈中的服务标签表示接收到的数据包是根据快速重路由（FRR）操作先前重新路由的。响应于接收到的数据分组在MPLS标签堆栈中不包括服务标签的确定，所接收的数据分组被重新路由到计算机网络的第二边缘设备以转发到相邻路由域。

6. 发明申请

US20100309919A1 LABEL DISTRIBUTION PROTOCOL LABEL FILTERING 有权
标题翻译：标签分配协议标签过滤
公开(公告)号：US20100309919A1
公开(公告)日：2010-12-09
申请号：US12478388
申请日：2009-06-04
申请人： Clarence Filsfils , Jim Guichard , Eric C. Rosen , Eric W. Osborne
发明人： Clarence Filsfils , Jim Guichard , Eric C. Rosen , Eric W. Osborne
IPC分类号： H04L12/28
CPC分类号： H04L45/50 , H04L45/00 , H04L45/026 , H04L45/04
摘要： In one embodiment, a device of a particular non-backbone routing domain in a computer network determines whether each of one or more routes is reachable within the particular non-backbone domain. The device may then generate a filtered set of label mappings having only those of the one or more routes reachable within the particular non-backbone domain. Accordingly, the device may advertise label mappings only of the filtered set to one or more neighboring devices.
摘要翻译：在一个实施例中，计算机网络中的特定非骨干路由域的设备确定一个或多个路由中的每一个是否在特定非骨干域内可达。然后，设备可以生成仅具有在特定非骨干域内可达的一个或多个路由的那些过滤的标签映射集合。因此，设备可以将仅滤波集合的标签映射通告给一个或多个相邻设备。

7. 发明授权

US07535828B2 Algorithm for backup PE selection 有权
标题翻译：备份PE选择算法
公开(公告)号：US07535828B2
公开(公告)日：2009-05-19
申请号：US11084838
申请日：2005-03-18
申请人： Robert Raszuk , Jean-Philippe Vasseur , Clarence Filsfils , Jim Guichard
发明人： Robert Raszuk , Jean-Philippe Vasseur , Clarence Filsfils , Jim Guichard
IPC分类号： G01R31/08 , H04L12/28
CPC分类号： H04L45/28 , H04L45/04 , H04L45/502
摘要： A fast reroute (FRR) technique is implemented at the edge of a computer network. If an edge device detects a node or link failure that prevents it from communicating with a neighboring routing domain, the edge device reroutes at least some data packets addressed to that domain to a backup edge device which, in turn, forwards the packets to the neighboring domain. The backup edge device is not permitted to reroute the packets a second time. According to the inventive technique, the edge device first identifies a group one or more possible backup edge devices and then selects at least one preferred backup edge device from the group. The edge device makes its selection based on the values of one or more metrics associated with the possible backup edge devices. The metrics are input to a novel selection algorithm that selects the preferred backup edge device(s) using a hierarchical selection process or a weighted-metric selection process, or some combination thereof.
摘要翻译：在计算机网络的边缘实现快速重路由（FRR）技术。如果边缘设备检测到阻止其与相邻路由域通信的节点或链路故障，则边缘设备将至少一些寻址到该域的数据分组重新路由到备份边缘设备，该备份边缘设备又将分组转发到邻居域。备份边缘设备不允许再次重新路由数据包。根据本发明的技术，边缘设备首先识别一个或多个可能的备份边缘设备，然后从组中选择至少一个优选的备份边缘设备。边缘设备根据与可能的备份边缘设备相关联的一个或多个度量值进行选择。将度量输入到新颖的选择算法，其使用分层选择过程或加权度量选择过程或其某种组合来选择优选的备份边缘设备。

8. 发明申请

US20060227723A1 Dynamic shared risk node group (SRNG) membership discovery 有权
标题翻译：动态共享风险节点组（SRNG）成员资格发现
公开(公告)号：US20060227723A1
公开(公告)日：2006-10-12
申请号：US11101134
申请日：2005-04-07
申请人： Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
发明人： Jean-Philippe Vasseur , Jim Guichard , Robert Raszuk
IPC分类号： H04L12/28
CPC分类号： H04L45/04 , H04L45/02 , H04L45/28
摘要： A technique is provided for dynamically discovering shared risk node group (SRNG) memberships of a plurality of interconnected edge devices in a computer network. According to the technique, each edge device “learns” the identities of its directly-attached peer devices situated in neighboring routing domains, e.g., by establishing an interior or exterior gateway routing protocol session with each peer. Thereafter, each edge device advertises the identities of its learned peers to the other interconnected edge devices. Preferably, the peer identities are distributed in novel “peer-router” extended community attributes transported in Border Gateway Protocol (BGP) messages. After an edge device has learned the identity of its own peers and received the identities of the other edge devices' peers, the device can automatically detect SRNG memberships in the computer network. Specifically, edge devices that advertise the same peer are determined to participate in the same SRNG.
摘要翻译：提供了一种用于动态发现计算机网络中的多个互连边缘设备的共享风险节点组（SRNG）成员资格的技术。根据该技术，每个边缘设备例如通过建立与每个对等体的内部或外部网关路由协议会话，“学习”其位于相邻路由域中的直接附着的对等设备的身份。此后，每个边缘设备将其学习的对等体的标识通告给其他互连的边缘设备。优选地，对等体身份分布在在边界网关协议（BGP）消息中传送的新颖的“对等路由器”扩展社区属性中。在边缘设备已经学习了自己的对等体的身份并且接收到其他边缘设备的对等体的身份之后，设备可以自动检测计算机网络中的SRNG成员资格。具体来说，宣告同一对等体的边缘设备被确定为参与相同的SRNG。

9. 发明授权

US09300579B2 Packet metadata channels carrying infrastructure metadata in networks 有权
标题翻译：在网络中携带基础设施元数据的数据包元数据信道
公开(公告)号：US09300579B2
公开(公告)日：2016-03-29
申请号：US13863013
申请日：2013-04-15
申请人： Daniel C. Frost , Simon James Trevor Spraggs , Rex Emmanuel Fernando , Stewart Frederick Bryant , Jim Guichard , Carlos M. Pignataro , Clarence Filsfils
发明人： Daniel C. Frost , Simon James Trevor Spraggs , Rex Emmanuel Fernando , Stewart Frederick Bryant , Jim Guichard , Carlos M. Pignataro , Clarence Filsfils
IPC分类号： H04L12/26 , H04L12/741 , H04L12/723
CPC分类号： H04L45/74 , H04L45/50
摘要： In one embodiment, an apparatus in a network determines particular metadata to communicate infrastructure information associated with a particular packet to another apparatus in the network. The apparatus sends into the network the particular packet including a metadata channel, comprising said particular metadata, external to the payload of the particular packet. Examples of infrastructure metadata carried in a packet include, but are not limited to, information defining service chaining for processing of the packet, contextual information for processing of the packet, specific handling instructions of the packet, and operations, maintenance, administration (OAM) instrumentation of the packet.
摘要翻译：在一个实施例中，网络中的装置确定特定元数据以将与特定分组相关联的基础设施信息传送到网络中的另一装置。该装置向该网络发送包括特定数据包的有效载荷之外的包括所述特定元数据的元数据信道的特定数据包。在分组中携带的基础架构元数据的示例包括但不限于定义用于处理分组的服务链接的信息，用于处理分组的上下文信息，分组的特定处理指令以及操作，维护，管理（OAM）数据包的检测。

10. 发明授权

US09049099B2 Label distribution protocol advertisement of services provided by application nodes 有权
标题翻译：应用节点提供的服务的标签分发协议广告
公开(公告)号：US09049099B2
公开(公告)日：2015-06-02
申请号：US12850952
申请日：2010-08-05
申请人： Carlos M. Pignataro , Cedell Adam Alexander, Jr. , Jim Guichard , David Delano Ward
发明人： Carlos M. Pignataro , Cedell Adam Alexander, Jr. , Jim Guichard , David Delano Ward
IPC分类号： H04L12/751 , H04L12/723 , H04L12/46
CPC分类号： H04L45/02 , H04L12/4633 , H04L45/507
摘要： An application node advertises service(s), using a label distribution protocol, that it offers to other network nodes and a corresponding label to use to identify these services(s). For example, a Targeted Label Distribution Protocol (tLDP) session may be established between a packet switching device and the application node providing these services to communicate the advertisement. Packets are encapsulated and sent from a service node (e.g., packet switching device) with the corresponding label to have one or more advertised services applied to the packet by an application node (e.g., a packet switching device and/or computing platform such as a Cisco ASR 1000).
摘要翻译：应用程序节点使用其提供给其他网络节点的标签分发协议和用于标识这些服务的相应标签来通告服务。例如，可以在分组交换设备和提供这些服务的应用节点之间建立目标标签分发协议（tLDP）会话来传送广告。分组被封装并从具有对应标签的服务节点（例如，分组交换设备）发送，以使应用节点（例如，分组交换设备和/或计算平台，例如， Cisco ASR 1000）。

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