PCEP Link State Abstraction
draft-chen-pce-h-connect-access-08
PCE Working Group H. Chen
Internet-Draft Futurewei
Intended status: Standards Track M. Toy
Expires: July 10, 2021 Verizon
X. Liu
Volta Networks
L. Liu
Fujitsu
Z. Li
China Mobile
January 6, 2021
PCEP Link State Abstraction
draft-chen-pce-h-connect-access-08
Abstract
This document presents extensions to the Path Computation Element
Communication Protocol (PCEP) for a child PCE to abstract its domain
information to its parent for supporting a hierarchical PCE system.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Conventions Used in This Document . . . . . . . . . . . . . . 3
4. Connections and Accesses . . . . . . . . . . . . . . . . . . 3
4.1. Information on Inter-domain Link . . . . . . . . . . . . 4
4.2. Information on ABR . . . . . . . . . . . . . . . . . . . 5
4.3. Information on Access Point . . . . . . . . . . . . . . . 5
5. Extensions to PCEP . . . . . . . . . . . . . . . . . . . . . 5
5.1. Messages for Abstract Information . . . . . . . . . . . . 6
5.2. Procedures . . . . . . . . . . . . . . . . . . . . . . . 6
5.2.1. Child Procedures . . . . . . . . . . . . . . . . . . 6
5.2.2. Parent Procedures . . . . . . . . . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . 10
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
8. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 10
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
9.1. Normative References . . . . . . . . . . . . . . . . . . 10
9.2. Informative References . . . . . . . . . . . . . . . . . 11
Appendix A. Message Encoding . . . . . . . . . . . . . . . . . . 12
A.1. Extension to Existing Message . . . . . . . . . . . . . . 12
A.1.1. TLVs . . . . . . . . . . . . . . . . . . . . . . . . 12
A.1.2. Sub-TLVs . . . . . . . . . . . . . . . . . . . . . . 13
A.2. New Message . . . . . . . . . . . . . . . . . . . . . . . 14
A.2.1. CONNECTION and ACCESS Object . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 16
1. Introduction
A hierarchical PCE architecture is described in RFC 6805, in which a
parent PCE maintains an abstract domain topology, which contains its
child domains (seen as vertices in the topology) and the connections
among them.
For a domain for which a child PCE is responsible, connections
attached to the domain may comprise inter-domain links and Area
Border Routers (ABRs). For a parent PCE to have the abstract domain
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