A Forward-Search P2MP TE LSP Inter-Domain Path Computation
draft-chen-pce-forward-search-p2mp-path-12
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Internet Engineering Task Force H. Chen
Internet-Draft D. Dhody
Intended status: Standards Track Huawei Technologies
Expires: November 5, 2017 May 4, 2017
A Forward-Search P2MP TE LSP Inter-Domain Path Computation
draft-chen-pce-forward-search-p2mp-path-12.txt
Abstract
This document presents a forward search procedure for computing a
path for a Point-to-MultiPoint (P2MP) Traffic Engineering (TE) Label
Switched Path (LSP) crossing a number of domains through using
multiple Path Computation Elements (PCEs). In addition, extensions
to the Path Computation Element Communication Protocol (PCEP) for
supporting the forward search procedure are described.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on November 5, 2017.
Copyright Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
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Chen & Dhody Expires November 5, 2017 [Page 1]
Internet-Draft Forward Search P2MP Path May 2017
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Conventions Used in This Document . . . . . . . . . . . . . . 4
4. Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 4
5. Forward Search P2MP Path Computation . . . . . . . . . . . . . 5
5.1. Overview of Procedure . . . . . . . . . . . . . . . . . . 5
5.2. Description of Procedure . . . . . . . . . . . . . . . . . 6
5.3. Processing Request and Reply Messages . . . . . . . . . . 8
6. Comparing to BRPC . . . . . . . . . . . . . . . . . . . . . . 9
7. Extensions to PCEP . . . . . . . . . . . . . . . . . . . . . . 10
7.1. RP Object Extension . . . . . . . . . . . . . . . . . . . 10
7.2. PCE Object . . . . . . . . . . . . . . . . . . . . . . . . 11
7.3. Candidate Node List Object . . . . . . . . . . . . . . . . 11
7.4. Node Flags Object . . . . . . . . . . . . . . . . . . . . 12
7.5. Request Message Extension . . . . . . . . . . . . . . . . 13
7.6. Reply Message Extension . . . . . . . . . . . . . . . . . 14
8. Security Considerations . . . . . . . . . . . . . . . . . . . 14
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
9.1. Request Parameter Bit Flags . . . . . . . . . . . . . . . 14
10. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 15
11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 15
11.1. Normative References . . . . . . . . . . . . . . . . . . . 15
11.2. Informative References . . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 16
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1. Introduction
RFC 4105 "Requirements for Inter-Area MPLS TE" lists the requirements
for computing a shortest path for a TE LSP crossing multiple IGP
areas; and RFC 4216 "MPLS Inter-Autonomous System (AS) TE
Requirements" describes the requirements for computing a shortest
path for a TE LSP crossing multiple ASes. RFC 5671 "Applicability of
PCE to P2MP MPLS and GMPLS TE" examines the applicability of PCE to
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