Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-14
PCE Working Group Y. Lee (Editor)
Internet-Draft Samsung
Intended status: Standards Track H. Zheng (Editor)
Expires: June 29, 2021 Huawei
O. G. de Dios
V. Lopez
Telefonica
Z. Ali
Cisco Systems
December 29, 2020
Path Computation Element (PCE) Protocol Extensions for Stateful PCE
Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-14
Abstract
The Path Computation Element (PCE) facilitates Traffic Engineering
(TE) based path calculation in large, multi-domain, multi-region, or
multi-layer networks. The PCE communication Protocol (PCEP) has been
extended to support stateful PCE functions where the PCE retains
information about the paths already present in the network, but
those extensions are technology-agnostic. This memo provides
extensions required for PCEP so as to enable the usage of a stateful
PCE capability in GMPLS-controlled networks.
Status of this Memo
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Internet-Draft Stateful PCEP for GMPLS December 2020
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Table of Contents
Table of Contents .............................................. 2
1. Introduction ................................................ 3
2. Conventions used in this document ........................... 4
3. General Context of Stateful PCE and PCEP for GMPLS .......... 4
4. Main Requirements ........................................... 5
5. Overview of PCEP Extensions for GMPLS Networks .............. 6
5.1. Capability Advertisement for Stateful PCEP in GMPLS .... 6
5.2. LSP Synchronization .................................... 6
5.3. LSP Delegation and Cleanup ............................. 7
5.4. LSP Operations ......................................... 7
6. Extension of Existing PCEP Messages ......................... 7
6.1. The PCRpt Message ...................................... 7
6.2. The PCUpd Message ...................................... 8
6.3. The PCInitiate Message ................................. 9
7. PCEP Object Extensions ..................................... 10
7.1. Existing Extensions used for Stateful GMPLS ........... 10
7.2. New Extensions ........................................ 11
7.2.1. OPEN Object Extension GMPLS-CAPABILITY TLV ....... 11
7.2.2. XRO Subobject..................................... 12
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