Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-11
PCE Working Group Y. Lee (Editor)
Internet-Draft H. Zheng (Editor)
Intended status: Standards Track Huawei
Expires: September 26, 2019.
O. G. de Dios
V. Lopez
Telefonica
Zafar Ali
Cisco Systems
March 25, 2019
Path Computation Element (PCE) Protocol Extensions for Stateful PCE
Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-11
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 March 2019
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Table of Contents
Table of Contents.................................................2
1. Introduction...................................................3
2. Conventions used in this document..............................4
3. Context of Stateful PCE and PCEP for GMPLS.....................4
4. Main Requirements..............................................5
5. PCEP Extensions for Generic Stateful GMPLS.....................6
5.1. LSP Update in GMPLS-controlled Networks...................6
5.2. LSP Synchronization in GMPLS-controlled Networks..........7
5.3. Modification of Existing PCEP Messages and Procedures.....8
5.3.1. Modification for LSP Re-optimization.................8
5.3.2. Modification for Route Exclusion.....................9
5.3.3. Modification for SRP Object to indicate Bi-directional
LSP........................................................10
5.4. Object Encoding..........................................10
6. PCEP Extensions for Remote-Initiated GMPLS LSPs...............10
6.1. Generalized Endpoint in LSP Initiate Message.............10
6.2. GENERALIZED-BANDWIDTH object in LSP Initiate Message.....11
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6.3. Protection Attributes in LSP Initiate Message............12
6.4. ERO in LSP Initiate Object...............................12
6.4.1. ERO with explicit label control.....................12
6.4.2. ERO with Path Keys..................................12
6.4.3. Switch Layer Object.................................13
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