Hierarchical PCE Discovery
draft-chen-pce-h-discovery-00

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Document Type Active Internet-Draft (individual)
Authors Huaimo Chen  , Mehmet Toy  , Lei Liu  , Zhenqiang Li 
Last updated 2016-07-06
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PCE Working Group                                                H. Chen
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                                  M. Toy
Expires: January 6, 2017                                         Comcast
                                                                  L. Liu
                                                                 Fujitsu
                                                                   Z. Li
                                                            China Mobile
                                                            July 5, 2016

                       Hierarchical PCE Discovery
                     draft-chen-pce-h-discovery-00

Abstract

   This document presents extensions to the Path Computation Element
   Communication Protocol (PCEP) to discover parent child relations and
   the information on a parent and a child PCE in a hierarchical PCE
   system.

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   to this document.  Code Components extracted from this document must
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  Conventions Used in This Document . . . . . . . . . . . . . . . 4
   4.  Extensions to PCEP  . . . . . . . . . . . . . . . . . . . . . . 4
     4.1.  Discovery of Parent Child Relation  . . . . . . . . . . . . 4
     4.2.  Sub-TLVs  . . . . . . . . . . . . . . . . . . . . . . . . . 5
       4.2.1.  Domain Sub-TLV  . . . . . . . . . . . . . . . . . . . . 5
       4.2.2.  PCE ID Sub-TLV  . . . . . . . . . . . . . . . . . . . . 5
     4.3.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . 6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . . . 8
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 8
   7.  Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . 8
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 9
     8.1.  Normative References  . . . . . . . . . . . . . . . . . . . 9
     8.2.  Informative References  . . . . . . . . . . . . . . . . . . 9

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1.  Introduction

   A hierarchical PCE architecture is described in RFC 6805, in which a
   parent PCE has a number of child PCEs.  A child PCE may also be a
   parent PCE, which has multiple child PCEs.

   For a parent PCE, it needs to obtain the information about each of
   its child PCEs.  The information about a child PCE comprises the
   address or ID of the PCE and the domain for which the PCE is
   responsible.  It may also include the position of the PCE, which
   indicates whether the PCE is a leaf (i.e., only a child) or branch
   (i.e., a child and also a parent).

   For a child PCE, it needs to obtain the information about its parent
   PCE, which includes the address or ID of the parent PCE.

   This document presents extensions to the Path Computation Element
   Communication Protocol (PCEP) to discover parent child relations and
   the information on a parent and a child PCE in a hierarchical PCE
   system.

2.  Terminology

   The following terminology is used in this document.
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