PCEP Link State Abstraction
draft-chen-pce-h-connect-access-05

• Status
• IESG evaluation record
• IESG writeups
• Email expansions
• History

• Versions
• 00
• 01
• 02
• 03
• 04
• 05

PCE Working Group                                                H. Chen
Internet-Draft                                                 Futurewei
Intended status: Standards Track                                  M. Toy
Expires: January 8, 2020                                         Verizon
                                                                  X. Liu
                                                          Volta Networks
                                                                  L. Liu
                                                                 Fujitsu
                                                                   Z. Li
                                                            China Mobile
                                                            July 7, 2019

                      PCEP Link State Abstraction
                   draft-chen-pce-h-connect-access-05

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

   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."

   This Internet-Draft will expire on January 8, 2020.

Copyright Notice

   Copyright (c) 2019 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

Chen, et al.             Expires January 8, 2020                [Page 1]
Internet-Draft              H-Connect-Access                   July 2019

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Conventions Used in This Document . . . . . . . . . . . . . .   3
   4.  Connections and Accesses  . . . . . . . . . . . . . . . . . .   3
     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  . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Messages for Abstract Information . . . . . . . . . . . .   6
     5.2.  Procedures  . . . . . . . . . . . . . . . . . . . . . . .   6
       5.2.1.  Child Procedures  . . . . . . . . . . . . . . . . . .   6
       5.2.2.  Parent Procedures . . . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     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  . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

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.

   For a domain for which a child PCE is responsible, connections
   attached to the domain may comprise inter-domain links and Area