公开(公告)号：US09143399B2

公开(公告)日：2015-09-22

申请号：US14186802

申请日：2014-02-21

Applicant: Cisco Technology, Inc.

Inventor： Stewart Frederick Bryant ,  Ian Michael Charles Shand

IPC: G01R31/08 ,  H04L12/24 ,  H04L12/707 ,  H04L12/703 ,  H04L12/717

CPC classification number: H04L41/0668 ,  H04L45/22 ,  H04L45/28 ,  H04L45/42

Abstract: In an embodiment, a method comprises determining a set of protected components that are associated with a notifying node; determining a single network repair address for the set of protected components, wherein the single network repair address is for use in response to unavailability of any of the protected components when transmitting network traffic to the notifying node; assigning the single network repair address to each of the protected components; wherein the notifying node is an internetworking device and wherein the method is performed by one or more processors.

Abstract translation: 在一个实施例中，一种方法包括确定与通知节点相关联的一组受保护组件; 确定所述受保护组件集合的单个网络修复地址，其中，当将网络业务传输到所述通知节点时，所述单个网络修复地址用于响应于任何所述受保护组件的不可用性; 将单个网络修复地址分配给每个受保护的组件; 其中所述通知节点是互联网络设备，并且其中所述方法由一个或多个处理器执行。

公开(公告)号：US20130148489A1

公开(公告)日：2013-06-13

申请号：US13760854

申请日：2013-02-06

Applicant: Cisco Technology, Inc.

Inventor： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  George Swallow ,  Stewart Frederick Bryant ,  Ian Michael Charles Shand

IPC: H04L12/24

CPC classification number: H04L12/2419 ,  H04L41/06 ,  H04L43/0811 ,  H04L45/26 ,  H04L45/28 ,  H04L45/50 ,  H04L47/10

Abstract: In one embodiment, a maintenance intermediate point (MIP) receives a packet traveling along a multi-protocol label switching (MPLS) label switched path (LSP) that extends from a first maintenance end point (MEP) to a second MEP. The receiving MIP decrements a time-to-live (TTL) value in a header of the packet. In response the TTL value in the header of the packet equaling a particular value, the receiving MIP examines an associated channel header (ACH) field in an operations, administration, and maintenance (OAM) message stored in a payload of the packet, and determines a particular OAM function to perform based on a code in the ACH field. The receiving MIP performs the particular OAM function.

Abstract translation: 在一个实施例中，维护中间点（MIP）接收沿着从第一维护终点（MEP）延伸到第二MEP的多协议标签交换（MPLS）标签交换路径（LSP）行进的分组。 接收MIP减少分组报头中的生存时间（TTL）值。 响应于等于特定值的分组的报头中的TTL值，接收MIP检查存储在分组的有效载荷中的操作，管理和维护（OAM）消息中的相关联的信道报头（ACH）字段，并且确定 基于ACH字段中的代码执行的特定OAM功能。 接收MIP执行特定的OAM功能。

公开(公告)号：US09401858B2

公开(公告)日：2016-07-26

申请号：US14319353

申请日：2014-06-30

Applicant: Cisco Technology, Inc.

Inventor： Pierre Jean Rene Francois ,  Clarence Filsfils ,  Stefano B. Previdi ,  Stewart F. Bryant ,  Ian Michael Charles Shand

IPC: H04L12/28 ,  H04L12/703 ,  H04L12/751 ,  H04L12/24

CPC classification number: H04L45/28 ,  H04L12/24 ,  H04L41/00 ,  H04L41/0654 ,  H04L45/02

Abstract: Various techniques can be used to avoid loops during network convergence after a topology change such as a failure. For example, a method can involve detecting a failure that disrupts an existing forwarding path between a node and a destination node; calculating at least one updated forwarding path from the node to the destination node; identifying a maximum time for at least a portion of the network to reach a post-convergence state with respect to the failure; until the maximum time has elapsed at the node, explicitly specifying at least a portion of the updated forwarding path in packet headers of any packets being sent from the node to the destination node; and after the maximum time has elapsed at the node, non-explicitly specifying the portion of the updated forwarding path in packet headers of any additional packets being sent from the node to the destination node.

Abstract translation: 在拓扑变化（如故障）后，可以采用各种技术避免网络融合过程中的环路。 例如，一种方法可以涉及检测中断节点和目的地节点之间的现有转发路径的故障; 计算从所述节点到所述目的地节点的至少一个更新的转发路径; 识别所述网络的至少一部分相对于所述故障达到后收敛状态的最大时间; 直到节点经过最长时间，明确地指定从节点发送到目的地节点的任何分组的分组报头中的更新转发路径的至少一部分; 并且在节点经过最大时间之后，非明确地指定从节点发送到目的地节点的任何附加分组的分组报头中更新的转发路径的部分。

公开(公告)号：US20150381406A1

公开(公告)日：2015-12-31

申请号：US14319353

申请日：2014-06-30

Applicant: Cisco Technology, Inc.

Inventor： Pierre Jean Rene Francois ,  Clarence Filsfils ,  Stefano B. Previdi ,  Stewart F. Bryant ,  Ian Michael Charles Shand

IPC: H04L12/24 ,  H04L12/703 ,  H04L12/751

CPC classification number: H04L45/28 ,  H04L12/24 ,  H04L41/00 ,  H04L41/0654 ,  H04L45/02

Abstract: Various techniques can be used to avoid loops during network convergence after a topology change such as a failure. For example, a method can involve detecting a failure that disrupts an existing forwarding path between a node and a destination node; calculating at least one updated forwarding path from the node to the destination node; identifying a maximum time for at least a portion of the network to reach a post-convergence state with respect to the failure; until the maximum time has elapsed at the node, explicitly specifying at least a portion of the updated forwarding path in packet headers of any packets being sent from the node to the destination node; and after the maximum time has elapsed at the node, non-explicitly specifying the portion of the updated forwarding path in packet headers of any additional packets being sent from the node to the destination node.

Abstract translation: 在拓扑变化（如故障）后，可以采用各种技术避免网络融合过程中的环路。 例如，一种方法可以涉及检测中断节点和目的地节点之间的现有转发路径的故障; 计算从所述节点到所述目的地节点的至少一个更新的转发路径; 识别所述网络的至少一部分相对于所述故障达到后收敛状态的最大时间; 直到节点经过最长时间，明确地指定从节点发送到目的地节点的任何分组的分组报头中的更新转发路径的至少一部分; 并且在节点经过最大时间之后，非明确地指定从节点发送到目的地节点的任何附加分组的分组报头中更新的转发路径的部分。

公开(公告)号：US08976682B2

公开(公告)日：2015-03-10

申请号：US13760854

申请日：2013-02-06

Applicant: Cisco Technology, Inc.

Inventor： Sami Boutros ,  Muthurajah Sivabalan ,  David D. Ward ,  George Swallow ,  Stewart Frederick Bryant ,  Ian Michael Charles Shand

IPC: H04L12/24 ,  H04L12/26 ,  H04L12/721 ,  H04L12/703 ,  H04L12/723 ,  H04L12/801

CPC classification number: H04L12/2419 ,  H04L41/06 ,  H04L43/0811 ,  H04L45/26 ,  H04L45/28 ,  H04L45/50 ,  H04L47/10

Abstract: In one embodiment, a maintenance intermediate point (MIP) receives a packet traveling along a multi-protocol label switching (MPLS) label switched path (LSP) that extends from a first maintenance end point (MEP) to a second MEP. The receiving MIP decrements a time-to-live (TTL) value in a header of the packet. In response the TTL value in the header of the packet equaling a particular value, the receiving MIP examines an associated channel header (ACH) field in an operations, administration, and maintenance (OAM) message stored in a payload of the packet, and determines a particular OAM function to perform based on a code in the ACH field. The receiving MIP performs the particular OAM function.

Abstract translation: 在一个实施例中，维护中间点（MIP）接收沿着从第一维护终点（MEP）延伸到第二MEP的多协议标签交换（MPLS）标签交换路径（LSP）行进的分组。 接收MIP减少分组报头中的生存时间（TTL）值。 响应于等于特定值的分组的报头中的TTL值，接收MIP检查存储在分组的有效载荷中的操作，管理和维护（OAM）消息中的相关联的信道报头（ACH）字段，并且确定 基于ACH字段中的代码执行的特定OAM功能。 接收MIP执行特定的OAM功能。