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Segment Routing Candidate Path Hot-standby switch in BGP
draft-yang-idr-sr-candidate-path-switch-00

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Liping Yang , Hao Li , Yang Wang , Yuanxiang Qiu , Mengxiao Chen
Last updated 2021-08-06 (Latest revision 2021-02-02)
RFC stream (None)
Intended RFC status (None)
Formats
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:

Abstract

Segment Routing is a source routing paradigm that explicitly indicates the forwarding path for packets at the ingress node. An SR policy is a set of candidate SR paths consisting of one or more segment lists with necessary path attributes. If an SR policy has multiple valid candidate paths, the device chooses the candidate path with the greatest preference value. If the chosen path fails, the SR policy must select another candidate path. During path reselection, packet loss might occur and thus affect service continuity. Therefore the candidate path hot-standby function occurs, the headend can compute two candidate paths, one is master and the other is backup, set them to the forwarding plane, and in this way, the switchover time is reduced. This document defines extensions to BGP to distribute hot-standby switch within SR policies.

Authors

Liping Yang
Hao Li
Yang Wang
Yuanxiang Qiu
Mengxiao Chen

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)