公开(公告)号：US09143395B2

公开(公告)日：2015-09-22

申请号：US13935649

申请日：2013-07-05

Applicant: Cisco Technology, Inc.

Inventor： Ahmed R Bashandy ,  Clarence Filsfils ,  Eric C. Rosen ,  Maciej Konstantynowicz

IPC: H04L12/24 ,  H04L12/741

CPC classification number: H04L41/0654 ,  H04L45/04 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50 ,  H04L45/74

Abstract: In one embodiment, a method comprises detecting, by a first provider edge router, a second provider edge router providing reachability to a prescribed destination address prefix via a protected next hop address; allocating, by the first provider edge router, a mirror forwarding table associated with the second provider edge router and identifying a destination used by the second provider edge router for reaching the prescribed destination address prefix; and the first provider edge router sending repair information to a Border Gateway Protocol (BGP)-free core network router in the core network, the repair information enabling the BGP-free core network router to add a context label and reroute a received data packet to the first provider edge router if the second provider edge router is unavailable, the context label enabling the first provider edge router to identify the destination in the rerouted data packet for delivery to the destination address prefix.

Abstract translation: 在一个实施例中，一种方法包括由第一提供商边缘路由器检测通过受保护的下一跳地址向规定的目的地地址前缀提供可达性的第二提供商边缘路由器; 由第一提供商边缘路由器分配与第二提供商边缘路由器相关联的镜像转发表，并且识别由第二提供商边缘路由器用于达到规定的目的地地址前缀的目的地; 并且第一提供商边缘路由器向核心网络中的边界网关协议（BGP）的核心网络路由器发送修复信息，所述修复信息使得无BGP核心网络路由器添加上下文标签并将接收到的数据分组重新路由到 第一供应商边缘路由器，如果第二提供商边缘路由器不可用，则上下文标签使得第一提供商边缘路由器能够识别重新路由的数据分组中的目的地以传递到目的地地址前缀。

公开(公告)号：US09124485B2

公开(公告)日：2015-09-01

申请号：US13970057

申请日：2013-08-19

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Giles D.Y. Heron ,  Andrew James McLachlan ,  Peter Weinberger ,  Maciej Konstantynowicz

IPC: H04L12/751 ,  H04L12/715

CPC classification number: H04L45/02 ,  H04L12/287 ,  H04L41/12 ,  H04L45/64 ,  H04L61/2015

Abstract: An example method for topology aware provisioning in a software-defined network environment is provided and includes receiving, at a provider edge device (PE), access network topology information associated with a customer edge device in a network environment, synthesizing the access network topology information and a local router information associated with the PE into a topology message, and publishing the topology message to a central controller in the network environment. The synthesizing can include aggregating the access network topology information and the local router information, modeling the aggregated information in a representation-independent format and encoding the representation-independent formatted aggregated information in standardized machine-parsable format.

Abstract translation: 提供了一种用于在软件定义的网络环境中进行拓扑感知配置的示例性方法，包括在提供商边缘设备（PE）处接收与网络环境中的客户边缘设备相关联的接入网络拓扑信息，合成接入网络拓扑信息 以及与PE相关联的本地路由器信息到拓扑消息中，并将拓扑消息发布到网络环境中的中央控制器。 合成可以包括聚合接入网络拓扑信息和本地路由器信息，以与表示无关的格式对聚合信息进行建模，并以标准化机器可解析格式编码与表示无关的格式化的聚合信息。

公开(公告)号：US20150049631A1

公开(公告)日：2015-02-19

申请号：US13970057

申请日：2013-08-19

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Giles D.Y. Heron ,  Andrew James McLachlan ,  Peter Weinberger ,  Maciej Konstantynowicz

IPC: H04L12/751

CPC classification number: H04L45/02 ,  H04L12/287 ,  H04L41/12 ,  H04L45/64 ,  H04L61/2015

Abstract: An example method for topology aware provisioning in a software-defined network environment is provided and includes receiving, at a provider edge device (PE), access network topology information associated with a customer edge device in a network environment, synthesizing the access network topology information and a local router information associated with the PE into a topology message, and publishing the topology message to a central controller in the network environment. The synthesizing can include aggregating the access network topology information and the local router information, modeling the aggregated information in a representation-independent format and encoding the representation-independent formatted aggregated information in standardized machine-parsable format.

Abstract translation: 提供了一种用于在软件定义的网络环境中进行拓扑感知配置的示例性方法，包括在提供商边缘设备（PE）处接收与网络环境中的客户边缘设备相关联的接入网络拓扑信息，合成接入网络拓扑信息 以及与PE相关联的本地路由器信息到拓扑消息中，并将拓扑消息发布到网络环境中的中央控制器。 合成可以包括聚合接入网络拓扑信息和本地路由器信息，以与表示无关的格式对聚合信息进行建模，并以标准化机器可解析格式编码与表示无关的格式化的聚合信息。