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RFC 8537
Title: Updates to the Fast Reroute
Procedures for Co-routed Associated Bidirectional
Label Switched Paths (LSPs)
Author: R. Gandhi, Ed.,
H. Shah,
J. Whittaker
Status: Standards Track
Stream: IETF
Date: February 2019
Mailbox: [email protected],
[email protected],
[email protected]
Pages: 16
Characters: 36970
Updates: RFC 4090, RFC 7551
I-D Tag: draft-ietf-teas-assoc-corouted-bidir-frr-07.txt
URL: https://www.rfc-editor.org/info/rfc8537
DOI: 10.17487/RFC8537
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.
This document is a product of the Traffic Engineering Architecture and
Signaling Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
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