PCEP Procedures and Protocol Extensions for Using PCE as a Central Controller (PCECC) of LSPs
draft-ietf-pce-pcep-extension-for-pce-controller-14

Document Type Active Internet-Draft (pce WG)
Authors Zhenbin Li  , Shuping Peng  , Mahendra Negi  , Quintin Zhao  , Chao Zhou 
Last updated 2021-03-17 (latest revision 2021-03-05)
Replaces draft-zhao-pce-pcep-extension-for-pce-controller
Stream Internet Engineering Task Force (IETF)
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Details
PCE Working Group                                                  Z. Li
Internet-Draft                                                   S. Peng
Intended status: Standards Track                     Huawei Technologies
Expires: September 5, 2021                                       M. Negi
                                                             RtBrick Inc
                                                                 Q. Zhao
                                                        Etheric Networks
                                                                 C. Zhou
                                                                     HPE
                                                           March 4, 2021

   PCEP Procedures and Protocol Extensions for Using PCE as a Central
                       Controller (PCECC) of LSPs
          draft-ietf-pce-pcep-extension-for-pce-controller-14

Abstract

   The Path Computation Element (PCE) is a core component of Software-
   Defined Networking (SDN) systems.

   A PCE-based Central Controller (PCECC) can simplify the processing of
   a distributed control plane by blending it with elements of SDN and
   without necessarily completely replacing it.  Thus, the LSP can be
   calculated/set up/initiated and the label forwarding entries can also
   be downloaded through a centralized PCE server to each network device
   along the path, while leveraging the existing PCE technologies as
   much as possible.

   This document specifies the procedures and PCEP extensions for using
   the PCE as the central controller for provisioning labels along the
   path of the static LSP.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

Li, et al.              Expires September 5, 2021               [Page 1]
Internet-Draft                    PCECC                       March 2021

   This Internet-Draft will expire on September 5, 2021.

Copyright Notice

   Copyright (c) 2021 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Basic PCECC Mode  . . . . . . . . . . . . . . . . . . . . . .   5
   4.  PCEP Requirements . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Procedures for Using the PCE as a Central Controller (PCECC)    6
     5.1.  Stateful PCE Model  . . . . . . . . . . . . . . . . . . .   6
     5.2.  New LSP Functions . . . . . . . . . . . . . . . . . . . .   6
     5.3.  New PCEP Object . . . . . . . . . . . . . . . . . . . . .   7
     5.4.  PCECC Capability Advertisement  . . . . . . . . . . . . .   7
     5.5.  LSP Operations  . . . . . . . . . . . . . . . . . . . . .   9
       5.5.1.  PCE-Initiated PCECC LSP . . . . . . . . . . . . . . .   9
       5.5.2.  PCC-Initiated PCECC LSP . . . . . . . . . . . . . . .  12
       5.5.3.  Central Controller Instructions . . . . . . . . . . .  15
         5.5.3.1.  Label Download CCI  . . . . . . . . . . . . . . .  16
         5.5.3.2.  Label Clean up CCI  . . . . . . . . . . . . . . .  16
       5.5.4.  PCECC LSP Update  . . . . . . . . . . . . . . . . . .  17
       5.5.5.  Re-Delegation and Clean up  . . . . . . . . . . . . .  20
       5.5.6.  Synchronization of Central Controllers Instructions .  20
       5.5.7.  PCECC LSP State Report  . . . . . . . . . . . . . . .  21
       5.5.8.  PCC-Based Allocations . . . . . . . . . . . . . . . .  21
   6.  PCEP Messages . . . . . . . . . . . . . . . . . . . . . . . .  21
     6.1.  The PCInitiate Message  . . . . . . . . . . . . . . . . .  22
     6.2.  The PCRpt Message . . . . . . . . . . . . . . . . . . . .  23
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