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RFC 9705
Title: Refresh-Interval Independent RSVP Fast Reroute
Facility Protection
Author: C. Ramachandran,
T. Saad,
D. Pacella
Status: Standards Track
Stream: IETF
Date: March 2025
Mailbox: [email protected],
[email protected],
[email protected]
Pages: 24
Updates: RFC 4090
I-D Tag: draft-ietf-mpls-ri-rsvp-frr-22.txt
URL: https://www.rfc-editor.org/info/rfc9705
DOI: 10.17487/RFC9705
The RSVP-TE Fast Reroute (FRR) extensions specified in RFC 4090
define two local repair techniques to reroute Label Switched Path
(LSP) traffic over pre-established backup tunnels. Facility backup
method allows one or more LSPs traversing a connected link or node to
be protected using a bypass tunnel. The many-to-one nature of local
repair technique is attractive from a scalability point of view. This
document enumerates facility backup procedures in RFC 4090 that rely
on refresh timeout, hence, making facility backup method
refresh-interval dependent. The RSVP-TE extensions defined in this
document will enhance the facility backup protection mechanism by
making the corresponding procedures refresh-interval independent, and
hence, compatible with the Refresh-Interval Independent RSVP
(RI-RSVP) capability specified in RFC 8370. Hence, this document
updates RFC 4090 in order to support the RI-RSVP capability specified
in RFC 8370.
This document is a product of the Multiprotocol Label Switching 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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