公开(公告)号：US20210092043A1

公开(公告)日：2021-03-25

申请号：US16579578

申请日：2019-09-23

Applicant: Cisco Technology, Inc.

Inventor： Clarence FILSFILS ,  Francois CLAD ,  Muthurajah SIVABALAN ,  Zafar ALI

IPC: H04L12/715 ,  H04L29/12 ,  H04L12/713 ,  H04L12/721 ,  H04L12/707

Abstract: Aspects described herein include a method for use with a software-defined network controller, as well as an associated computer program product and system. The method comprises assigning a segment identifier to an endpoint node within a destination domain of a plurality of domains. Adjacent domains of the plurality of domains are connected via a respective set of two or more domain border routers. The method further comprises assigning a respective segment identifier to each domain. Each domain border router advertises the segment identifiers of the respective two adjacent domains. The method further comprises, responsive to a request from a headend node within a source domain of the plurality of domains, computing a path from the headend node to the endpoint node. The path includes (i) the segment identifiers of any domains between the headend node and the endpoint node, and (ii) the segment identifier of the endpoint node.

公开(公告)号：US20200274798A1

公开(公告)日：2020-08-27

申请号：US15929601

申请日：2020-05-12

Applicant: Cisco Technology, Inc.

Inventor： Clarence FILSFILS ,  Ahmed Refaat BASHANDY ,  Syed Kamran RAZA ,  Darren DUKES ,  Patrice BRISSETTE ,  Jisu BHATTACHARYA

IPC: H04L12/721 ,  H04L12/755 ,  H04L12/741 ,  H04L12/749

Abstract: In one embodiment, segment routing (SR) network processing of packets is performed on packets having a segment identifier structure providing processing and/or memory efficiencies. Responsive to an identified particular segment routing policy, the particular router retrieves from memory a dynamic segment routing identifier portion of the particular SR policy that includes a SR node value and a SR function value. The SR function value identifies segment routing processing to be performed by a router in the network identified based on the SR node value. A segment routing discriminator is independently identified, possibly being a fixed value for all segment identifiers in the network. Before sending into the network, a complete segment identifier is added to the particular packet by combining the segment routing discriminator with the dynamic segment routing identifier portion. The particular packet including the complete segment identifier is sent into the network.

公开(公告)号：US20200076727A1

公开(公告)日：2020-03-05

申请号：US16675083

申请日：2019-11-05

Applicant: Cisco Technology, Inc.

Inventor： Clarence FILSFILS ,  Zafar ALI ,  Syed Kamran RAZA ,  Ahmed Refaat BASHANDY ,  Nagendra Kumar NAINAR ,  Carlos M. PIGNATARO ,  Jaganbabu RAJAMANICKAM ,  Rakesh GANDHI ,  Bhupendra YADAV ,  Faisal IQBAL

IPC: H04L12/721 ,  H04L12/26 ,  H04L12/751 ,  H04L12/733 ,  H04L12/24

Abstract: In one embodiment, a service chain data packet is instrumented as it is communicated among network nodes in a network providing service-level and/or networking operations visibility. The service chain data packet includes a particular header identifying a service group defining one or more service functions, and is a data packet and not a probe packet. A network node adds networking and/or service-layer operations data to the particular service chain data packet, such as, but not limited to, in the particular header. Such networking operations data includes a performance metric or attribute related to the transport of the particular service chain packet in the network. Such service-layer operations data includes a performance metric or attribute related to the service-level processing of the particular service chain data packet in the network.

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。