Hierarchical PCE Determination
draft-chen-pce-h-discovery-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
Hierarchical PCE Determination
draft-chen-pce-h-discovery-08
Abstract
This document presents extensions to the Path Computation Element
Communication Protocol (PCEP) for determining parent child relations
and exchanging the information between a parent and a child PCE in a
hierarchical PCE system.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Conventions Used in This Document . . . . . . . . . . . . . . 4
4. Extensions to PCEP . . . . . . . . . . . . . . . . . . . . . 4
4.1. Determination of Parent Child Relation . . . . . . . . . 4
4.2. Sub-TLVs . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2.1. Domain Sub-TLV . . . . . . . . . . . . . . . . . . . 5
4.2.2. PCE ID Sub-TLV . . . . . . . . . . . . . . . . . . . 6
4.3. Procedures . . . . . . . . . . . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . . 8
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
7. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 9
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.1. Normative References . . . . . . . . . . . . . . . . . . 9
8.2. Informative References . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
A hierarchical PCE architecture is described in RFC 6805, in which a
parent PCE has a number of child PCEs. A child PCE may also be a
parent PCE, which has multiple child PCEs.
For a parent PCE, it needs to obtain the information about each of
its child PCEs. The information about a child PCE comprises the
address or ID of the PCE and the domain for which the PCE is
responsible. It may also include the position of the PCE, which
indicates whether the PCE is a leaf (i.e., only a child) or branch
(i.e., a child and also a parent). In addition, the information may
indicate whether the child PCE and its responsible domain is in a
same organization as the parent PCE.
For a child PCE, it needs to obtain the information about its parent
PCE, which includes the address or ID of the parent PCE. The
information may also indicate whether the parent PCE is in a same
organization as the child PCE.
After a user configures a parent PCE and a child PCE over a session,
this parent child PCE relation needs to be determined in the protocol
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