Path Computation Element (PCE) Protocol Extensions for Stateful PCE Usage in GMPLS-controlled Networks
draft-ietf-pce-pcep-stateful-pce-gmpls-06

The information below is for an old version of the document
Document Type Active Internet-Draft (pce WG)
Authors Xian Zhang  , Young Lee  , Fatai Zhang  , Ramon Casellas  , Oscar de Dios  , Zafar Ali 
Last updated 2017-11-13 (latest revision 2017-05-11)
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PCE Working Group                                       Xian Zhang
Internet-Draft                                           Young Lee
Intended status: Standards Track                       Fatai Zhang
                                                            Huawei
                                                    Ramon Casellas
                                                              CTTC
                                            Oscar Gonzalez de Dios
                                                    Telefonica I+D
                                                         Zafar Ali
                                                     Cisco Systems

Expires: May 13, 2018                            November 13, 2017

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

               draft-ietf-pce-pcep-stateful-pce-gmpls-06.txt

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.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
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   Drafts.

   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

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   as reference   material or to cite them other than as "work in
   progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt.

   The list of Internet-Draft Shadow Directories can be accessed at
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   This Internet-Draft will expire on May 13, 2018.

Copyright Notice

   Copyright (c) 2017 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
   (http://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 to this document. Code Components extracted from this
   document must include Simplified BSD License text as described in
   Section 4.e of the Trust Legal Provisions and are provided without
   warranty as described in the Simplified BSD License.

Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC-2119 [RFC2119].

Table of Contents

   Table of Contents.................................................2
   1. Introduction...................................................3
   2. PCEP Extensions................................................3
      2.1. Overview of Requirements..................................3
      2.2. LSP Delegation in GMPLS-controlled Networks...............4
      2.3. LSP Synchronization in GMPLS-controlled Networks..........5
      2.4. Modification of Existing PCEP Messages and Procedures.....6
         2.4.1. Modification for LSP Re-optimization.................6
         2.4.2. Modification for Route Exclusion.....................7
      2.5. Object Encoding...........................................8
   3. IANA Considerations............................................8

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      3.1. New PCEP Error Codes......................................8
      3.2. New Subobject for the Exclude Route Object................9
   4. Manageability Considerations...................................9
      4.1. Requirements on Other Protocols and Functional Components.9
   5. Security Considerations........................................9
   6. Acknowledgement...............................................10
   7. References....................................................10
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