Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-12
PCE Working Group Y. Lee (Editor)
Internet-Draft SKKU
Intended status: Standards Track H. Zheng (Editor)
Expires: April 30, 2020. Huawei
O. G. de Dios
V. Lopez
Telefonica
Zafar Ali
Cisco Systems
October 29, 2019
Path Computation Element (PCE) Protocol Extensions for Stateful PCE
Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-12
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
This Internet-Draft is submitted to IETF in full conformance with
the provisions of BCP 78 and BCP 79.
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progress."
Lee & Zheng, et al Expires April 2020 [Page 1]
Internet-Draft Stateful PCEP for GMPLS October 2019
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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. Stateful PCEP Extensions for GMPLS Networks ................. 6
5.1. Capability Advertisement for Stateful PCEP in GMPLS .... 6
5.2. LSP Synchronization in GMPLS-controlled Networks........ 7
5.3. LSP Delegation and Cleanup ............................ 8
5.4. LSP Operations in Stateful PCEP for GMPLS .............. 8
5.4.1. LSP Update in GMPLS-controlled Networks ........... 8
5.4.2. LSP Initiation in GMPLS-controlled Networks ....... 9
6. Modification of Existing PCEP Messages and Procedures ....... 9
6.1. Modification for LSP Re-optimization ................... 9
6.2. Modification for Route Exclusion ...................... 10
6.2.1. Modification for SRP Object ...................... 11
7. PCEP Object Extensions ..................................... 11
7.1. Generalized Endpoint .................................. 11
7.2. GENERALIZED-BANDWIDTH object .......................... 12
7.3. The LSP Protection Information ........................ 12
Lee & Zheng Expires April 2020 [Page 2]
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