Extensions to Resource Reservation Protocol For Re-optimization of Loosely Routed Point-to-Multipoint Traffic Engineering LSPs

Document Type Replaced Internet-Draft (teas WG)
Authors Tarek Saad  , Rakesh Gandhi  , Zafar Ali  , Robert Venator  , Yuji Kamite 
Last updated 2014-12-08 (latest revision 2014-09-30)
Replaces draft-tsaad-mpls-p2mp-loose-path-reopt
Replaced by RFC 8149
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state Dead WG Document
Document shepherd Loa Andersson
IESG IESG state Replaced by draft-ietf-teas-p2mp-loose-path-reopt
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


For a Traffic Engineered (TE) point-to-multipoint (P2MP) Label Switched Path (LSP), it is preferable in some cases to re-evaluate and re-optimize the entire P2MP-TE LSP by re-signaling all its Source-to-Leaf (S2L) sub-LSP(s). Existing mechanisms, a mechanism for an ingress Label Switched Router (LSR) to trigger a new path re- evaluation request and a mechanism for a mid-point LSR to notify an availability of a preferred path, operate on an individual or a sub- group of S2L sub-LSP(s) basis only. This document defines RSVP-TE signaling extensions to allow an ingress node of a P2MP-TE LSP to request the re-evaluation of the entire LSP tree containing one or more S2L sub-LSPs whose paths are loose (or abstract) hop expanded, and for a mid-point LSR to notify to the ingress node that a preferable tree exists for the entire P2MP-TE LSP. This document also defines markers to indicate beginning and end of a S2L sub-LSP descriptor list when RSVP message needs to be fragmented due to large number of S2L sub-LSPs when performing re-optimization.


Tarek Saad (tsaad@cisco.com)
Rakesh Gandhi (rgandhi@cisco.com)
Zafar Ali (zali@cisco.com)
Robert Venator (robert.h.venator.civ@mail.mil)
Yuji Kamite (y.kamite@ntt.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)