PCEP Procedures and Protocol Extensions for Using PCE as a Central Controller (PCECC) of LSPs
draft-zhao-pce-pcep-extension-for-pce-controller-06

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PCE Working Group                                                Q. Zhao
Internet-Draft                                                     Z. Li
Intended status: Standards Track                                D. Dhody
Expires: April 29, 2018                                   S. Karunanithi
                                                     Huawei Technologies
                                                               A. Farrel
                                                   Juniper Networks, Inc
                                                                 C. Zhou
                                                           Cisco Systems
                                                        October 26, 2017

   PCEP Procedures and Protocol Extensions for Using PCE as a Central
                       Controller (PCECC) of LSPs
          draft-zhao-pce-pcep-extension-for-pce-controller-06

Abstract

   In certain networks deployment scenarios, service providers would
   like to keep all the existing MPLS functionalities in both MPLS and
   GMPLS while removing the complexity of existing signaling protocols
   such as LDP and RSVP-TE.  PCE has been proposed to be used as a
   central controller (PCECC) so that LSP can be calculated/setup/
   initiated and label forwarding entries are downloaded through a
   centralized PCE server to each network devices along the path while
   leveraging the existing PCE technologies as much as possible.

   This draft specify the procedures and PCEP protocol extensions for
   using the PCE as the central controller, where LSPs are
   calculated/setup/initiated and label forwarding entries are
   downloaded through extending PCEP.

Status of This Memo

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   This Internet-Draft will expire on April 29, 2018.

Zhao, et al.             Expires April 29, 2018                 [Page 1]
Internet-Draft                    PCECC                     October 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Basic PCECC Mode  . . . . . . . . . . . . . . . . . . . . . .   4
   4.  PCEP Requirements . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Procedures for Using the PCE as the Central Controller
       (PCECC) . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Stateful PCE Model  . . . . . . . . . . . . . . . . . . .   5
     5.2.  New LSP Functions . . . . . . . . . . . . . . . . . . . .   5
     5.3.  PCECC Capability Advertisement  . . . . . . . . . . . . .   7
     5.4.  LSP Operations  . . . . . . . . . . . . . . . . . . . . .   7
       5.4.1.  Basic PCECC LSP Setup . . . . . . . . . . . . . . . .   7
       5.4.2.  Label Operations  . . . . . . . . . . . . . . . . . .   9
         5.4.2.1.  Label Download  . . . . . . . . . . . . . . . . .   9
         5.4.2.2.  Label Cleanup . . . . . . . . . . . . . . . . . .   9
       5.4.3.  PCE Initiated PCECC LSP . . . . . . . . . . . . . . .  10
       5.4.4.  PCECC LSP Update  . . . . . . . . . . . . . . . . . .  11
       5.4.5.  Session Termination . . . . . . . . . . . . . . . . .  12
       5.4.6.  LABEL-DB Synchronization  . . . . . . . . . . . . . .  13
         5.4.6.1.  LABEL-DB Synchronization procedure  . . . . . . .  13
       5.4.7.  PCECC LSP State Report  . . . . . . . . . . . . . . .  16
   6.  PCEP messages . . . . . . . . . . . . . . . . . . . . . . . .  16
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