公开(公告)号：US20120026897A1

公开(公告)日：2012-02-02

申请号：US12846796

申请日：2010-07-29

申请人： Jim Guichard ,  David Delano Ward ,  Cedell Adam Alexander, JR. ,  Brian Lance Hiltscher ,  Doron Oz

发明人： Jim Guichard ,  David Delano Ward ,  Cedell Adam Alexander, JR. ,  Brian Lance Hiltscher ,  Doron Oz

IPC分类号： H04L12/26

CPC分类号： H04L43/028 ,  H04L49/35 ,  H04L67/327

摘要： Packets are encapsulated and sent from a service node (e.g., packet switching device) using one or more services applied to a packet by an application node (e.g., a packet switching device and/or computing platform such as a Cisco ASR 1000) to generate a result, which is used by the service node to process packets of a flow of packets to which the packet belonged. An example of a service applied to a packet is a classification service, such as, but not limited to, using deep packet inspection on the packet to identify a classification result. The service node can, for example, use this classification result to process other packets in a same packet flow, such that all packets of a flow do not need to be, nor typically are, sent to an application node for processing.

摘要翻译： 使用由应用节点（例如，分组交换设备和/或诸如Cisco ASR 1000的计算平台）应用于分组的一个或多个服务，从服务节点（例如，分组交换设备）封装并发送分组，以生成 这是由服务节点用于处理分组所属的分组流的分组的结果。 应用于分组的服务的示例是分类服务，诸如但不限于对分组进行深度分组检查以识别分类结果。 例如，服务节点可以使用该分类结果来处理相同分组流中的其他分组，使得流的所有分组不需要也不典型地被发送到应用节点进行处理。

公开(公告)号：US08081563B2

公开(公告)日：2011-12-20

申请号：US11580167

申请日：2006-10-11

申请人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

发明人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

IPC分类号： G01R31/08

CPC分类号： H04L45/04 ,  H04L1/22 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50 ,  H04L45/68

摘要： The protection of multi-segment pseudowires by utilizing pre-computed backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a pre-computed backup path is chosen, and the chosen backup path is signaled to the tail-end. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire. Networks can be configured to signal a detected failure to the head-end; choose a pre-computed backup path; and signal the backup path to the tail-end.

摘要翻译： 本文公开了通过利用预先计算的备用路径来保护多段伪线。 公开的实施例包括为多段伪线建立至少一个备用路径的方法，该建立是在检测到主路径中的故障之前执行的。 在检测到路径故障时，将检测到的故障信号发送到前端，选择预先计算的备份路径，并将选定的备份路径发送到尾端。 在其他公开的实施例中，设备被配置为在检测到主路径中的故障之前建立用于多段伪线的至少一个备用路径。 网络可以配置为将检测到的故障信号发送到前端; 选择预先计算的备份路径; 并将后备路径指示给尾端。

公开(公告)号：US20100008361A1

公开(公告)日：2010-01-14

申请号：US12169062

申请日：2008-07-08

申请人： Jim Guichard ,  Bruce S. Davie ,  David Ward

发明人： Jim Guichard ,  Bruce S. Davie ,  David Ward

IPC分类号： H04L12/56

CPC分类号： H04L45/50 ,  H04L45/00 ,  H04L45/04

摘要： According to one aspect of the present invention, a method includes obtaining a first advertisement at a first provider edge (PE) device from a first customer edge (CE) device that is associated with a virtual private network, and sending a second advertisement on a control plane path associated with a border gateway protocol after obtaining the first advertisement. The first PE device has a routing and forwarding table. The first advertisement identifies a plurality of local routes associated with the first VPN, and includes a first indication that information relating to the plurality of local routes is not to be stored in the routing and forwarding table. The second advertisement identifies the local routes, an address of the first CE device, and the first CE device as a next hop.

摘要翻译： 根据本发明的一个方面，一种方法包括从与虚拟专用网络相关联的第一客户边缘（CE）设备获取在第一提供者边缘（PE）设备处的第一广告，并且在第 在获得第一广告之后与边界网关协议相关联的控制平面路径。 第一个PE设备具有路由和转发表。 第一广告识别与第一VPN相关联的多个本地路由，并且包括与多个本地路由有关的信息不存储在路由和转发表中的第一指示。 第二个广告标识本地路由，第一个CE设备的地址和第一个CE设备作为下一跳。

公开(公告)号：US08891553B2

公开(公告)日：2014-11-18

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： H04J3/24 ,  H04L29/06 ,  H04L12/723 ,  H04L12/715 ,  H04L12/66 ,  H04L12/70

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。

公开(公告)号：US08804496B2

公开(公告)日：2014-08-12

申请号：US13315948

申请日：2011-12-09

申请人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

发明人： Jim Guichard ,  Luca Martini ,  Keyur Patel ,  Thomas David Nadeau

IPC分类号： G01R31/08

CPC分类号： H04L45/04 ,  H04L1/22 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42 ,  H04L45/44 ,  H04L45/50 ,  H04L45/68

摘要： The protection of multi-segment pseudowires by utilizing backup paths is disclosed herein. Disclosed embodiments include methods that establish at least one backup path for multi-segment pseudowires, the establishing being performed prior to detection of failure in the primary path. Upon detecting a path failure, the detected failure is signaled to the head-end, a backup path is chosen, and reachability information associated with the chosen backup path is signaled across the backup path before reverse traffic is switched to the backup path. In other disclosed embodiments, apparatus are configured to establish, prior to detection of failure in the primary path, at least one backup path for the multi-segment pseudowire.

摘要翻译： 本文公开了通过利用备用路径保护多段伪线。 公开的实施例包括为多段伪线建立至少一个备用路径的方法，该建立是在检测到主路径中的故障之前执行的。 在检测到路径故障时，将检测到的故障信号发送到前端，选择备份路径，并且在将反向流量切换到备份路径之前通过备份路径发信号通知所选备份路径的可达性信息。 在其他公开的实施例中，设备被配置为在检测到主路径中的故障之前建立用于多段伪线的至少一个备用路径。

公开(公告)号：US08345682B2

公开(公告)日：2013-01-01

申请号：US12883080

申请日：2010-09-15

申请人： Carlos M. Pignataro ,  Stewart Frederick Bryant ,  Jim Guichard ,  David Delano Ward

发明人： Carlos M. Pignataro ,  Stewart Frederick Bryant ,  Jim Guichard ,  David Delano Ward

IPC分类号： H04L12/28 ,  H04L12/56

CPC分类号： H04L45/68

摘要： Data path processing information is included in the pseudowire layer of pseudowire packets in order to provide information for use in the data path processing of data (e.g., a packet), typically, but not always, included in the payload of the pseudowire packet itself. The pseudowire packet typically includes in corresponding fields: a pseudowire label for identifying a pseudowire type; a pseudowire control word; and payload data. The pseudowire type identifies the structure of the pseudowire control word field and the payload field, including the location of data path meta data, such as in the pseudowire control word field or payload field. This data path meta data identifies one or more attributes for use in processing the payload data.

摘要翻译： 数据路径处理信息被包括在伪线分组的伪线层中，以便提供用于在伪线分组本身的有效载荷中通常但并不总是包括在数据（例如，分组）的数据路径处理中的信息。 伪线分组通常包括在相应的字段中：用于识别伪线类型的伪线标签; 伪线控制字; 和有效载荷数据。 伪线类型识别伪线控制字字段和有效载荷字段的结构，包括数据路径元数据的位置，例如在伪线控制字字段或有效载荷字段中。 该数据路径元数据标识用于处理有效载荷数据的一个或多个属性。

公开(公告)号：US20120063450A1

公开(公告)日：2012-03-15

申请号：US12883080

申请日：2010-09-15

申请人： Carlos M. Pignataro ,  Stewart Frederick Bryant ,  Jim Guichard ,  David Delano Ward

发明人： Carlos M. Pignataro ,  Stewart Frederick Bryant ,  Jim Guichard ,  David Delano Ward

IPC分类号： H04L12/56

CPC分类号： H04L45/68

摘要： Data path processing information is included in the pseudowire layer of pseudowire packets in order to provide information for use in the data path processing of data (e.g., a packet), typically, but not always, included in the payload of the pseudowire packet itself. The pseudowire packet typically includes in corresponding fields: a pseudowire label for identifying a pseudowire type; a pseudowire control word; and payload data. The pseudowire type identifies the structure of the pseudowire control word field and the payload field, including the location of data path meta data, such as in the pseudowire control word field or payload field. This data path meta data identifies one or more attributes for use in processing the payload data.

摘要翻译： 数据路径处理信息被包括在伪线分组的伪线层中，以便提供用于在伪线分组本身的有效载荷中通常但并不总是包括在数据（例如，分组）的数据路径处理中的信息。 伪线分组通常包括在相应的字段中：用于识别伪线类型的伪线标签; 伪线控制字; 和有效载荷数据。 伪线类型识别伪线控制字字段和有效载荷字段的结构，包括数据路径元数据的位置，例如在伪线控制字字段或有效载荷字段中。 该数据路径元数据标识用于处理有效载荷数据的一个或多个属性。

公开(公告)号：US08098663B2

公开(公告)日：2012-01-17

申请号：US12169062

申请日：2008-07-08

申请人： Jim Guichard ,  Bruce S. Davie ,  David Ward

发明人： Jim Guichard ,  Bruce S. Davie ,  David Ward

IPC分类号： H04L12/28

CPC分类号： H04L45/50 ,  H04L45/00 ,  H04L45/04

摘要： According to one aspect of the present invention, a method includes obtaining a first advertisement at a first provider edge (PE) device from a first customer edge (CE) device that is associated with a virtual private network, and sending a second advertisement on a control plane path associated with a border gateway protocol after obtaining the first advertisement. The first PE device has a routing and forwarding table. The first advertisement identifies a plurality of local routes associated with the first VPN, and includes a first indication that information relating to the plurality of local routes is not to be stored in the routing and forwarding table. The second advertisement identifies the local routes, an address of the first CE device, and the first CE device as a next hop.

摘要翻译： 根据本发明的一个方面，一种方法包括从与虚拟专用网络相关联的第一客户边缘（CE）设备获取在第一提供者边缘（PE）设备处的第一广告，并且在第 在获得第一广告之后与边界网关协议相关联的控制平面路径。 第一个PE设备具有路由和转发表。 第一广告识别与第一VPN相关联的多个本地路由，并且包括与多个本地路由有关的信息不存储在路由和转发表中的第一指示。 第二个广告标识本地路由，第一个CE设备的地址和第一个CE设备作为下一跳。

公开(公告)号：US20150319079A1

公开(公告)日：2015-11-05

申请号：US14797377

申请日：2015-07-13

申请人： Cedell Adam Alexander, JR. ,  Christopher Y. Metz ,  Jim Guichard ,  David Delano Ward

发明人： Cedell Adam Alexander, JR. ,  Christopher Y. Metz ,  Jim Guichard ,  David Delano Ward

IPC分类号： H04L12/721 ,  H04L29/06

CPC分类号： H04L45/14 ,  H04L12/4633 ,  H04L63/0272

摘要： Packets are encapsulated and sent from a service node to an application node for applying one or more Layer-4 to Layer-7 services to the packets, with service-applied packets being returned to the service node. An identification of a virtual private network (VPN) may be carried within a request packet, encapsulating a particular packet, sent by a service node to an application node for applying a service to the particular packet; with the corresponding response packet sent to the service node including an identification of the VPN for use by the service node in forwarding the services-applied packet. Additionally, parameters may be included in a request packet to identify a particular service of a general service to be applied to a particular packet encapsulated in the request packet.

摘要翻译： 数据包被封装并从服务节点发送到应用节点，以将一个或多个第4层到第7层服务应用于数据包，并将服务应用的数据包返回给服务节点。 虚拟专用网（VPN）的标识可以在由服务节点发送的请求分组中包含的特定分组携带到应用节点，以将服务应用于特定分组; 其中发送到服务节点的相应响应分组包括VPN的标识，以供服务节点在转发服务应用分组时使用。 此外，可以在请求分组中包括参数以识别要应用于封装在请求分组中的特定分组的一般服务的特定服务。

公开(公告)号：US20120033664A1

公开(公告)日：2012-02-09

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： H04L12/56

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）。