公开(公告)号：US20150109902A1

公开(公告)日：2015-04-23

申请号：US14155409

申请日：2014-01-15

Applicant: Cisco Technology, Inc.

Inventor： Nagendra KUMAR ,  Carlos M. PIGNATARO ,  Clarence FILSFILS ,  Pierre Jean Rene FRANCOIS

IPC: H04L12/24 ,  H04L12/723 ,  H04L12/703

CPC classification number: H04L41/0668 ,  H04L41/0659 ,  H04L45/22 ,  H04L45/28 ,  H04L45/34 ,  H04L45/50 ,  H04L45/507

Abstract: In one embodiment, a method comprises selecting, by an ingress provider edge router, one of first or second provider edge routers as a primary router for reaching a destination via a core network, and selecting the other of the first or second provider edge routers as a backup router for reaching the destination via the core network; and inserting, into an IPv6 data packet destined for the destination, a primary label assigned by the primary router and a repair label assigned by backup router, and an IPv6 extension header specifying first and second segment identifiers associated with the respective first and second provider edge routers and a protected flag that enables fast rerouting of the IPv6 data packet to the backup router if the primary router is unavailable.

Abstract translation: 在一个实施例中，一种方法包括：由入口提供商边缘路由器选择第一或第二提供商边缘路由器之一作为主路由器，经由核心网络到达目的地，并且选择第一或第二提供商边缘路由器中的另一个作为 通过核心网络到达目的地的备用路由器; 并将目的地为目的地的IPv6数据包插入到由主路由器分配的主标签和由备份路由器分配的修复标签，以及指定与相应的第一和第二提供商边缘相关联的第一和第二段标识符的IPv6扩展报头 路由器和受保护的标志，如果主路由器不可用，则可以将IPv6数据包快速重新路由到备份路由器。

公开(公告)号：US20150109904A1

公开(公告)日：2015-04-23

申请号：US14078219

申请日：2013-11-12

Applicant: Cisco Technology, Inc.

Inventor： Clarence FILSFILS ,  Nagendra KUMAR ,  Ahmed R. BASHANDY ,  Stefano Benedetto PREVIDI ,  Pierre Jean Rene FRANCOIS ,  Carlos M. PIGNATARO

IPC: H04L12/707 ,  H04L12/751

CPC classification number: H04L45/22 ,  H04L45/02 ,  H04L45/28 ,  H04L45/34 ,  H04L45/50

Abstract: In one embodiment, a method comprises generating, by a first provider edge router associated with a first segment identifier, a primary label for reaching a destination, and repair information for reaching the destination if a second provider edge router is unavailable to reach the destination; allocating, by the first provider edge router, a first protected next-hop address associated with the first segment identifier for protected reachability to at least the destination; and sending via a core network, by the first provider edge router, an advertisement specifying the label and the repair information, enabling an ingress provider edge router to insert, into a data packet destined for the destination, the labels from the first provider edge router and the second provider edge router based on the repair information, for fast rerouting to the destination via one of the first or second provider edge router if the other is unavailable.

Abstract translation: 在一个实施例中，一种方法包括由与第一段标识符相关联的第一提供商边缘路由器生成用于到达目的地的主标签，以及如果第二提供商边缘路由器不可用于到达目的地则修复用于到达目的地的信息; 由所述第一提供商边缘路由器分配与所述第一分段标识符相关联的第一受保护的下一跳地址以将所保护的可达性分配给至少所述目的地; 并且经由核心网络由第一提供商边缘路由器发送指定标签和修复信息的广告，使得入口提供商边缘路由器能够将来自第一提供商边缘路由器的标签插入到目的地为目的地的数据分组中 以及基于所述修复信息的所述第二提供商边缘路由器，用于通过所述第一或第二提供商边缘路由器之一快速重新路由到所述目的地，如果所述修复信息不可用。