Extensions to Path Computation Element Communication Protocol (PCEP) for Hierarchical Path Computation Elements (PCE)
draft-ietf-pce-hierarchy-extensions-04
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draft-zhang-pce-hierarchy-extensions
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Jonathan Hardwick <jonathan.hardwick@metaswitch.com>
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PCE Working Group F. Zhang
Internet-Draft Q. Zhao
Intended status: Standards Track Huawei
Expires: September 6, 2018 O. Gonzalez de Dios
Telefonica I+D
R. Casellas
CTTC
D. King
Old Dog Consulting
March 5, 2018
Extensions to Path Computation Element Communication Protocol (PCEP) for
Hierarchical Path Computation Elements (PCE)
draft-ietf-pce-hierarchy-extensions-04
Abstract
The Hierarchical Path Computation Element (H-PCE) architecture RFC
6805, 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 necessary Hierarchical PCE
procedures and protocol extensions.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 6, 2018.
Zhang, et al. Expires September 6, 2018 [Page 1]
Internet-Draft PCEP Extensions for H-PCE March 2018
Copyright Notice
Copyright (c) 2018 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
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
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described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 5
1.3. Requirements Language . . . . . . . . . . . . . . . . . . 5
2. Requirements for H-PCE . . . . . . . . . . . . . . . . . . . 5
2.1. Path Computation Request . . . . . . . . . . . . . . . . 5
2.1.1. Qualification of PCEP Requests . . . . . . . . . . . 5
2.1.2. Multi-domain Objective Functions . . . . . . . . . . 6
2.1.3. Multi-domain Metrics . . . . . . . . . . . . . . . . 6
2.2. Parent PCE Capability Advertisement . . . . . . . . . . . 7
2.3. PCE Domain Discovery . . . . . . . . . . . . . . . . . . 7
2.4. Domain Diversity . . . . . . . . . . . . . . . . . . . . 7
3. PCEP Extensions . . . . . . . . . . . . . . . . . . . . . . . 8
3.1. OPEN object . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1. H-PCE capability TLV . . . . . . . . . . . . . . . . 8
3.1.2. Domain-ID TLV . . . . . . . . . . . . . . . . . . . . 9
3.2. RP object . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.1. H-PCE-FLAG TLV . . . . . . . . . . . . . . . . . . . 10
3.2.2. Domain-ID TLV . . . . . . . . . . . . . . . . . . . . 10
3.3. Objective Functions . . . . . . . . . . . . . . . . . . . 11
3.3.1. OF Codes . . . . . . . . . . . . . . . . . . . . . . 11
3.3.2. OF Object . . . . . . . . . . . . . . . . . . . . . . 12
3.4. Metric Object . . . . . . . . . . . . . . . . . . . . . . 12
3.5. SVEC Object . . . . . . . . . . . . . . . . . . . . . . . 13
3.6. PCEP-ERROR object . . . . . . . . . . . . . . . . . . . . 13
3.6.1. Hierarchy PCE Error-Type . . . . . . . . . . . . . . 13
3.7. NO-PATH Object . . . . . . . . . . . . . . . . . . . . . 14
4. H-PCE Procedures . . . . . . . . . . . . . . . . . . . . . . 14
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