I-D Action: draft-hu-spring-segment-routing-proxy-forwarding-12.txt

internet-drafts@ietf.org Sat, 24 October 2020 00:41 UTC

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A New Internet-Draft is available from the on-line Internet-Drafts directories.

        Title           : SR-TE Path Midpoint Protection
        Authors         : Zhibo Hu
                          Huaimo Chen
                          Junda Yao
                          Chris Bowers
	Filename        : draft-hu-spring-segment-routing-proxy-forwarding-12.txt
	Pages           : 23
	Date            : 2020-10-23

   Segment Routing Traffic Engineering (SR-TE) supports explicit paths
   using segment lists containing adjacency-SIDs, node-SIDs and binding-
   SIDs.  The current SR FRR such as TI-LFA provides fast re-route
   protection for the failure of a node along a SR-TE path by the direct
   neighbor or say point of local repair (PLR) to the failure.  However,
   once the IGP converges, the SR FRR is no longer sufficient to forward
   traffic of the path around the failure, since the non-neighbors of
   the failure will no longer have a route to the failed node.  This
   document describes a mechanism for fast re-route protection against
   the failure of a SR-TE path after the IGP converges.  It provides
   fast re-route protection for an adjacency segment, a node segment and
   a binding segment of the path.

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