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RFC 8149
Title: RSVP Extensions for Reoptimization of
Loosely Routed Point-to-Multipoint
Traffic Engineering Label
Switched Paths (LSPs)
Author: T. Saad, Ed.,
R. Gandhi, Ed.,
Z. Ali,
R. Venator,
Y. Kamite
Status: Standards Track
Stream: IETF
Date: April 2017
Mailbox: tsaad@cisco.com,
rgandhi@cisco.com,
zali@cisco.com,
robert.h.venator.civ@mail.mil,
y.kamite@ntt.com
Pages: 17
Characters: 37916
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-teas-p2mp-loose-path-reopt-09.txt
URL: https://www.rfc-editor.org/info/rfc8149
DOI: 10.17487/RFC8149
The reoptimization of a Point-to-Multipoint (P2MP) Traffic Engineering
(TE) Label Switched Path (LSP) may be triggered based on the need to
reoptimize an individual source-to-leaf (S2L) sub-LSP or a set of
S2L sub-LSPs, both using the Sub-Group-based reoptimization method, or
the entire P2MP-TE LSP tree using the Make-Before-Break (MBB) method.
This document discusses the application of the existing mechanisms
for path reoptimization of loosely routed Point-to-Point (P2P) TE
LSPs to the P2MP-TE LSPs, identifies issues in doing so, and defines
procedures to address them. When reoptimizing a large number of S2L
sub-LSPs in a tree using the Sub-Group-based reoptimization method,
the S2L sub-LSP descriptor list may need to be semantically
fragmented. This document defines the notion of a fragment
identifier to help recipient nodes unambiguously reconstruct the
fragmented S2L sub-LSP descriptor list.
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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