PCEP extensions for p2mp sr policy
draft-hsd-pce-sr-p2mp-policy-02
Network Working Group H. Bidgoli, Ed.
Internet-Draft Nokia
Intended status: Standards Track V. Voyer
Expires: May 3, 2021 Bell Canada
S. Rajarathinam
Nokia
E. Hemmati
Cisco System
T. Saad
Juniper Networks
S. Sivabalan
Ciena
October 30, 2020
PCEP extensions for p2mp sr policy
draft-hsd-pce-sr-p2mp-policy-02
Abstract
SR P2MP policies are set of policies that enable architecture for
P2MP service delivery. This document specifies extensions to the
Path Computation Element Communication Protocol (PCEP) that allow a
stateful PCE to compute and initiate P2MP paths from a Root to a set
of Leaves.
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document authors. All rights reserved.
Bidgoli, et al. Expires May 3, 2021 [Page 1]
Internet-Draft PCEP p2mp sr policy October 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions used in this document . . . . . . . . . . . . . . 4
3. Overview of PCEP Opration in SR P2MP Network . . . . . . . . 4
3.1. High level view of P2MP Policy Objects . . . . . . . . . 5
3.1.1. Shared Tree vs Non-Shared Replication Segment . . . . 6
3.2. existing drafts used for defining a P2MP Policy . . . . . 7
3.2.1. Existing drafts/rfcs used by this draft . . . . . . . 7
3.2.2. P2MP Policy Identification . . . . . . . . . . . . . 8
3.2.3. Replication Segment Identificaton . . . . . . . . . . 9
3.3. High Level Procedures for P2MP SR LSP Instantiation . . . 9
3.3.1. PCE-Init Procedure . . . . . . . . . . . . . . . . . 9
3.3.2. PCC-Init Procedure . . . . . . . . . . . . . . . . . 10
3.3.3. Comon Procedure . . . . . . . . . . . . . . . . . . . 10
3.3.4. Global Optimiation of the Candidate Path . . . . . . 12
3.3.5. Fast Reroute . . . . . . . . . . . . . . . . . . . . 12
3.3.6. Connecting Replication Segment via Segment List . . . 13
3.4. SR P2MP Policy and Replication Segment TLVs and Objects . 14
3.4.1. SR P2MP Policy Objects . . . . . . . . . . . . . . . 14
3.4.2. Replication Segment Objects . . . . . . . . . . . . . 14
3.4.3. P2MP Policy vs Replication Segment . . . . . . . . . 15
3.4.4. P2MP Policy and Replication Segment general
considerations . . . . . . . . . . . . . . . . . . . 15
4. Object Format . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1. Open Message and Capablity Exchange . . . . . . . . . . . 16
4.2. Symbolic Name in PCInit Message from PCC . . . . . . . . 17
4.3. P2MP Policy Specific Objects and TLVs . . . . . . . . . . 17
4.3.1. P2MP Policy Association Group for P2MP Policy . . . . 17
4.3.1.1. P2MP SR Policy Association Group Policy
Identifiers TLV . . . . . . . . . . . . . . . . . 17
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