Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-10

The information below is for an old version of the document
Document Type Active Internet-Draft (pce WG)
Authors Young Lee  , Fatai Zhang  , Ramon Casellas  , Oscar de Dios  , Zafar Ali 
Last updated 2019-03-07
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PCE Working Group                                    Young Lee (Editor)
Internet-Draft                                              Fatai Zhang
Intended status: Standards Track                                 Huawei
                                                         Ramon Casellas
                                                                   CTTC
                                                 Oscar Gonzalez de Dios
                                                         Telefonica I+D
                                                              Zafar Ali
                                                          Cisco Systems

                                                          March 7, 2019

  Path Computation Element (PCE) Protocol Extensions for Stateful PCE
                   Usage in GMPLS-controlled Networks

                 draft-ietf-pce-pcep-stateful-pce-gmpls-10

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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   Task Force (IETF), its areas, and its working groups.  Note that
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   as reference   material or to cite them other than as "work in
   progress."

Zhang et al             Expires September 2019                 [Page 1]
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   This Internet-Draft will expire on September 7, 2019.

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Table of Contents

   Table of Contents.................................................2
   1. Introduction...................................................3
   2. Conventions used in this document..............................3
   3. Context of Stateful PCE and PCEP for GMPLS.....................4
   4. Main Requirements..............................................4
   5. PCEP Extensions................................................5
      5.1. LSP Update in GMPLS-controlled Networks...................5
      5.2. LSP Synchronization in GMPLS-controlled Networks..........5
      5.3. Modification of Existing PCEP Messages and Procedures.....7
         5.3.1. Modification for LSP Re-optimization.................7
         5.3.2. Modification for Route Exclusion.....................8
         5.3.3. Modification for SRP Object to indicate Bi-directional
         LSP.........................................................9
      5.4. Object Encoding...........................................9
   6. IANA Considerations............................................9
      6.1. New PCEP Error Codes......................................9
      6.2. New Subobject for the Exclude Route Object...............10
      6.3. New "B" Flag in the SRP Object...........................10
   7. Manageability Considerations..................................10
      7.1. Requirements on Other Protocols and Functional Components10

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   8. Security Considerations.......................................11
   9. Acknowledgement...............................................11
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