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PCE Working Group                                       Xiaoping Zheng
Internet-Draft                                                Nan Hua
Intended status: Standards Track                          Wangyang Liu
Expires: April 24, 2017                                    Yinqiu Jia
                                                           Yanlong Li
                                                          Bingkun Zhou
                                                   Tsinghua University
                                                         Guoying Zhang
                                    China Academy of Telecom. Research
                                                      October 24, 2016


            Cooperative Stateful Path Computation Element (PCE)
           for Inter-Domain Inter-Vendor PCE-initiated LSP Setup
            draft-zheng-pce-stateful-pce-inter-domain-lsp-04.txt


Abstract

   A stateful Path Computation Element (PCE) maintains the information
   of Label Switched Path (LSP) and resource availability within a
   domain. Multiple stateful PCEs are able to provide traffic
   engineering inter-domain LSPs through cooperating with each other.

   This document introduces the applicability of cooperative stateful
   PCE for establishing inter-domain inter-vendor LSPs which are
   initiated by PCE.

Requirements Language

   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 [RFC2119].

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 24, 2017.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors. All rights reserved.

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   described in the Simplified BSD License.

Table of Contents


   1. Introduction ................................................. 3
   2. Terminology .................................................. 3
   3. Overview of the Stateful PCE ................................. 3
   4. Multiple Stateful PCEs Deployment and Operation .............. 4
      4.1. Traffic Engineering Database ............................ 5
      4.2. Cooperative Inter-domain Path Computation ............... 5
      4.3. Cooperative Inter-domain LSP Setup ...................... 6
      4.4. Vendor-specific Message Conversion ...................... 6
   5. Applicability of Cooperative Stateful PCE .................... 6
      5.1. TED initialization ...................................... 6
      5.2. PCE-initiated LSP Setup ................................. 7
         5.2.1. Inter-domain Inter-vendor LSP Setup Request......... 7
         5.2.2. Inter-domain Path Computation ...................... 7
         5.2.3. Inter-domain Path Segmentation ..................... 8
         5.2.4. Intra-domain LSP Setup Procedure ................... 8
         5.2.5. Inter-domain Inter-vendor LSP Setup Response ....... 9
      5.3. TED Synchronization ..................................... 9
   6. Security Considerations ..................................... 10
   7. IANA Considerations ......................................... 10
   8. Acknowledgments ............................................. 10
   9. References .................................................. 10
      9.1. Normative References ................................... 10
      9.2. Informative References ................................. 11
   10. Authors' Addresses ......................................... 11





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