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    Scalable edge node protection using segment routing
    2.
    发明授权
    Scalable edge node protection using segment routing 有权
    可扩展边缘节点保护使用段路由

    公开(公告)号：US09525619B2

    公开(公告)日：2016-12-20

    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: H04L12/751 ,  H04L12/707 ,  H04L12/721 ,  H04L12/703 ,  H04L12/723

    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。

    Scalable BGP protection from edge node failure using context labels in data packets identifying backup router mirror table
    3.
    发明授权
    Scalable BGP protection from edge node failure using context labels in data packets identifying backup router mirror table 有权
    使用标识备份路由器镜像表的数据包中的上下文标签，从边缘节点故障中扩展BGP保护

    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。

    Scalable BGP protection from edge node failure using dynamically assigned labels in data packets
    5.
    发明授权
    Scalable BGP protection from edge node failure using dynamically assigned labels in data packets 有权
    在数据包中使用动态分配的标签，可以从边缘节点故障中扩展BGP保护

    公开(公告)号：US09036463B2

    公开(公告)日：2015-05-19

    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。

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