Internet Engineering Task Force (IETF) Q. Zhao, Ed.
Request for Comments: 6006 Huawei Technology
Category: Standards Track D. King, Ed.
ISSN: 2070-1721 Old Dog Consulting
F. Verhaeghe
Thales Communication France
T. Takeda
NTT Corporation
Z. Ali
Cisco Systems, Inc.
J. Meuric
France Telecom
September 2010
Extensions to
the Path Computation Element Communication Protocol (PCEP)
for Point-to-Multipoint Traffic Engineering Label Switched Paths
Abstract
Point-to-point Multiprotocol Label Switching (MPLS) and Generalized
MPLS (GMPLS) Traffic Engineering Label Switched Paths (TE LSPs) may
be established using signaling techniques, but their paths may first
need to be determined. The Path Computation Element (PCE) has been
identified as an appropriate technology for the determination of the
paths of point-to-multipoint (P2MP) TE LSPs.
This document describes extensions to the PCE communication Protocol
(PCEP) to handle requests and responses for the computation of paths
for P2MP TE LSPs.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6006.
Zhao, et al. Standards Track [Page 1]
RFC 6006 Extensions to PCEP for P2MP TE LSPs September 2010
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Table of Contents
1. Introduction ....................................................3
1.1. Terminology ................................................4
1.2. Requirements Language ......................................5
2. PCC-PCE Communication Requirements ..............................5
3. Protocol Procedures and Extensions ..............................6
3.1. P2MP Capability Advertisement ..............................6
3.1.1. P2MP Computation TLV in the Existing PCE
Discovery Protocol ..................................6
3.1.2. Open Message Extension ..............................7
3.2. Efficient Presentation of P2MP LSPs ........................7
3.3. P2MP Path Computation Request/Reply Message Extensions .....8
3.3.1. The Extension of the RP Object ......................8
3.3.2. The New P2MP END-POINTS Object ......................9
3.4. Request Message Format ....................................12
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