RFC 8537

Updates to the Fast Reroute Procedures for Co-routed Associated Bidirectional Label Switched Paths (LSPs), February 2019

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Status:
PROPOSED STANDARD
Updates:
RFC 4090, RFC 7551
Authors:
R. Gandhi, Ed.
H. Shah
J. Whittaker
Stream:
IETF
Source:
teas (rtg)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC8537

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Abstract

Resource Reservation Protocol (RSVP) association signaling can be used to bind two unidirectional Label Switched Paths (LSPs) into an associated bidirectional LSP. When an associated bidirectional LSP is co-routed, the reverse LSP follows the same path as its forward LSP. This document updates the fast reroute procedures defined in RFC 4090 to support both single-sided and double-sided provisioned associated bidirectional LSPs. This document also updates the procedure for associating two reverse LSPs defined in RFC 7551 to support co-routed bidirectional LSPs. The fast reroute procedures can ensure that, for the co-routed LSPs, traffic flows on co-routed paths in the forward and reverse directions after a failure event.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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