Network Working Group F. Zhang, Ed.
Internet-Draft Q. Zhao
Intended status: Standards Track Huawei
Expires: August 29, 2013 O. Gonzalez de Dios, Ed.
Telefonica I+D
R. Casellas
CTTC
D. King
Old Dog Consulting
February 25, 2013
Extensions to Path Computation Element Communication Protocol (PCEP) for
Hierarchical Path Computation Elements (PCE)
draft-zhang-pce-hierarchy-extensions-03
Abstract
The Hierarchical Path Computation Element (H-PCE) architecture,
defined in the companion framework document [RFC6805], provides a
mechanism to allow the optimum sequence of domains to be selected,
and the optimum end-to-end path to be derived through the use of a
hierarchical relationship between domains.
This document defines the Path Computation Element Protocol (PCEP)
extensions for the purpose of implementing Hierarchical PCE
procedures which are described in the aforementioned document.
Status of this Memo
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This Internet-Draft will expire on August 29, 2013.
Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
Zhang, et al. Expires August 29, 2013 [Page 1]
Internet-Draft PCEP Extensions for H-PCE February 2013
document authors. All rights reserved.
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Zhang, et al. Expires August 29, 2013 [Page 2]
Internet-Draft PCEP Extensions for H-PCE February 2013
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
1.3. Requirements Language . . . . . . . . . . . . . . . . . . 5
2. Requirements for H-PCE . . . . . . . . . . . . . . . . . . . . 5
2.1. PCEP Requests . . . . . . . . . . . . . . . . . . . . . . 5
2.1.1. Qualification of PCEP Requests . . . . . . . . . . . . 6
2.1.2. Multi-domain Objective Functions . . . . . . . . . . . 6
2.1.3. Multi-domain Metrics . . . . . . . . . . . . . . . . . 7
2.2. Parent PCE Capability Discovery . . . . . . . . . . . . . 7
2.3. PCE Domain and PCE ID Discovery . . . . . . . . . . . . . 7
3. PCEP Extensions (Encoding) . . . . . . . . . . . . . . . . . . 8
3.1. OPEN object . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1. OF Codes . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.2. OPEN Object Flags . . . . . . . . . . . . . . . . . . 8
3.1.3. Domain-ID TLV . . . . . . . . . . . . . . . . . . . . 9
3.1.4. PCE-ID TLV . . . . . . . . . . . . . . . . . . . . . . 10
3.2. RP object . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.1. RP Object Flags . . . . . . . . . . . . . . . . . . . 11
3.2.2. Domain-ID TLV . . . . . . . . . . . . . . . . . . . . 11
3.3. Metric Object . . . . . . . . . . . . . . . . . . . . . . 11
3.4. PCEP-ERROR object . . . . . . . . . . . . . . . . . . . . 11
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