公开(公告)号：US20150009806A1

公开(公告)日：2015-01-08

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 minor 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次要转发表，并且识别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：US20150009803A1

公开(公告)日：2015-01-08

申请号：US13935639

申请日：2013-07-05

Applicant: Cisco Technology, Inc.

Inventor： Ahmed R. BASHANDY ,  Clarence FILSFILS ,  Eric C. ROSEN

IPC: H04L12/24 ,  H04L12/707

CPC classification number: H04L41/0668 ,  H04L45/04 ,  H04L45/22 ,  H04L45/28 ,  H04L45/50

Abstract: In one embodiment, a method comprises detecting, by a provider edge router configured for providing reachability for core network traffic to a prescribed destination address prefix, a backup provider edge router relative to the prescribed destination address prefix; allocating, by the provider edge router, a distinct protected next-hop address for reachability to at least the destination address prefix via the provider edge router; and sending via a core network, by the provider edge router, repair information for the prescribed destination address prefix to ingress provider edge routers and a BGP-free core network router in the core network, the repair information enabling the ingress provider edge routers to insert primary and backup switching labels into each data packet of the core network traffic enabling the BGP-free core network router to reroute the received packet to the backup provider edge router if the provider edge router is unavailable.

Abstract translation: 在一个实施例中，一种方法包括通过被配置为将核心网络业务的可达性提供到规定的目的地地址前缀的提供商边缘路由器检测备用提供商边缘路由器相对于规定的目的地地址前缀; 由提供商边缘路由器分配经由提供商边缘路由器到达至少目的地地址前缀的不同的受保护的下一跳地址; 并通过提供商边缘路由器的核心网络向核心网络中的入口提供商边缘路由器和无BGP核心网络路由器修复用于规定目的地地址前缀的信息，允许入口提供商边缘路由器插入的修复信息 主交换标签和备份交换标签分配到核心网络流量的每个数据包中，如果提供商边缘路由器不可用，则使无BGP核心网络路由器将接收到的数据包重新路由到备份提供商边缘路由器。