PCEP Link State Abstraction
draft-chen-pce-h-connect-access-04

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PCE Working Group                                                H. Chen
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                  M. Toy
Expires: September 6, 2018                                       Verizon
                                                                  X. Liu
                                                                   Jabil
                                                                  L. Liu
                                                                 Fujitsu
                                                                   Z. Li
                                                            China Mobile
                                                           March 5, 2018

                      PCEP Link State Abstraction
                   draft-chen-pce-h-connect-access-04

Abstract

   This document presents extensions to the Path Computation Element
   Communication Protocol (PCEP) for a child PCE to abstract its domain
   information to its parent for supporting a hierarchical PCE system.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 6, 2018.

Copyright Notice

   Copyright (c) 2018 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

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   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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  Conventions Used in This Document  . . . . . . . . . . . . . .  3
   4.  Connections and Accesses . . . . . . . . . . . . . . . . . . .  4
     4.1.  Information on Inter-domain Link . . . . . . . . . . . . .  4
     4.2.  Information on ABR . . . . . . . . . . . . . . . . . . . .  5
     4.3.  Information on Access Point  . . . . . . . . . . . . . . .  5
   5.  Extensions to PCEP . . . . . . . . . . . . . . . . . . . . . .  6
     5.1.  Messages for Abstract Information  . . . . . . . . . . . .  6
     5.2.  Procedures . . . . . . . . . . . . . . . . . . . . . . . .  7
       5.2.1.  Child Procedures . . . . . . . . . . . . . . . . . . .  7
       5.2.2.  Parent Procedures  . . . . . . . . . . . . . . . . . .  9
   6.  Security Considerations  . . . . . . . . . . . . . . . . . . . 10
   7.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
   8.  Acknowledgement  . . . . . . . . . . . . . . . . . . . . . . . 11
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 11
     9.2.  Informative References . . . . . . . . . . . . . . . . . . 11
   Appendix A.  Message Encoding  . . . . . . . . . . . . . . . . . . 12
     A.1.  Extension to Existing Message  . . . . . . . . . . . . . . 12
       A.1.1.  TLVs . . . . . . . . . . . . . . . . . . . . . . . . . 12
       A.1.2.  Sub-TLVs . . . . . . . . . . . . . . . . . . . . . . . 13
     A.2.  New Message  . . . . . . . . . . . . . . . . . . . . . . . 14
       A.2.1.  CONNECTION and ACCESS Object . . . . . . . . . . . . . 15

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1.  Introduction

   A hierarchical PCE architecture is described in RFC 6805, in which a
   parent PCE maintains an abstract domain topology, which contains its
   child domains (seen as vertices in the topology) and the connections
   among them.