PCEP Link State Abstraction
draft-chen-pce-h-connect-access-03

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PCE Working Group                                                H. Chen
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                  M. Toy
Expires: March 15, 2018                                          Verizon
                                                                  X. Liu
                                                                   Jabil
                                                                  L. Liu
                                                                 Fujitsu
                                                                   Z. Li
                                                            China Mobile
                                                      September 11, 2017

                      PCEP Link State Abstraction
                   draft-chen-pce-h-connect-access-03

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.

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   This Internet-Draft will expire on March 15, 2018.

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   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
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect
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   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
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