[New-wg-docs] I-D Action: draft-ietf-spring-node-protection-for-sr-te-paths-00.txt

internet-drafts@ietf.org Mon, 21 September 2020 09:48 UTC

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Subject: [New-wg-docs] I-D Action: draft-ietf-spring-node-protection-for-sr-te-paths-00.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Source Packet Routing in Networking WG of the IETF.

        Title           : Node Protection for SR-TE Paths
        Authors         : Shraddha Hegde
                          Chris Bowers
                          Stephane Litkowski
                          Xiaohu Xu
                          Feng Xu
	Filename        : draft-ietf-spring-node-protection-for-sr-te-paths-00.txt
	Pages           : 13
	Date            : 2020-09-21

   Segment routing supports the creation of explicit paths using
   adjacency-sids, node-sids, and binding-sids.  It is important to
   provide fast reroute (FRR) mechanisms to respond to failures of links
   and nodes in the Segment-Routed Traffic-Engineered(SR-TE) path.  A
   point of local repair (PLR) can provide FRR protection against the
   failure of a link in an SR-TE path by examining only the first (top)
   label in the SR label stack.  In order to protect against the failure
   of a node, a PLR may need to examine the second label in the stack as
   well, in order to determine SR-TE path beyond the failed node.  This
   document specifies how a PLR can use the first and second label in
   the label stack describing an SR-TE path to provide protection
   against node failures.

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