Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-11

Document Type Active Internet-Draft (pce WG)
Last updated 2019-03-25
Replaces draft-zhang-pce-pcep-stateful-pce-gmpls, draft-ietf-pce-remote-initiated-gmpls-lsp
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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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   Task Force (IETF), its areas, and its working groups.  Note that
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Internet-Draft         Stateful PCEP for GMPLS               March 2019

   as reference   material or to cite them other than as "work in
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   This Internet-Draft will expire on September 26, 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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