PCEP Extension for Distribution of Link-State and TE Information.
draft-dhodylee-pce-pcep-ls-11

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Last updated 2018-06-21
Replaces draft-dhodylee-pce-pcep-te-data-extn
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PCE Working Group                                               D. Dhody
Internet-Draft                                                    Y. Lee
Intended status: Standards Track                     Huawei Technologies
Expires: December 23, 2018                                 D. Ceccarelli
                                                                Ericsson
                                                           June 21, 2018

   PCEP Extension for Distribution of Link-State and TE Information.
                     draft-dhodylee-pce-pcep-ls-11

Abstract

   In order to compute and provide optimal paths, Path Computation
   Elements (PCEs) require an accurate and timely Traffic Engineering
   Database (TED).  Traditionally this TED has been obtained from a link
   state (LS) routing protocol supporting traffic engineering
   extensions.

   This document extends the Path Computation Element Communication
   Protocol (PCEP) with Link-State and TE Information.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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
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   This Internet-Draft will expire on December 23, 2018.

Dhody, et al.           Expires December 23, 2018               [Page 1]
Internet-Draft                   PCEP-LS                       June 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Applicability . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Requirements for PCEP extension . . . . . . . . . . . . . . .   6
   5.  New Functions to distribute link-state (and TE) via PCEP  . .   7
   6.  Overview of Extension to PCEP . . . . . . . . . . . . . . . .   7
     6.1.  New Messages  . . . . . . . . . . . . . . . . . . . . . .   7
     6.2.  Capability Advertisement  . . . . . . . . . . . . . . . .   8
     6.3.  Initial Link-State (and TE) Synchronization . . . . . . .   8
       6.3.1.  Optimizations for LS Synchronization  . . . . . . . .  11
     6.4.  LS Report . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  Transport . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   8.  PCEP Messages . . . . . . . . . . . . . . . . . . . . . . . .  12
     8.1.  LS Report Message . . . . . . . . . . . . . . . . . . . .  12
     8.2.  The PCErr Message . . . . . . . . . . . . . . . . . . . .  12
   9.  Objects and TLV . . . . . . . . . . . . . . . . . . . . . . .  13
     9.1.  TLV Format  . . . . . . . . . . . . . . . . . . . . . . .  13
     9.2.  Open Object . . . . . . . . . . . . . . . . . . . . . . .  13
       9.2.1.  LS Capability TLV . . . . . . . . . . . . . . . . . .  13
     9.3.  LS Object . . . . . . . . . . . . . . . . . . . . . . . .  14
       9.3.1.  Routing Universe TLV  . . . . . . . . . . . . . . . .  16
       9.3.2.  Route Distinguisher TLV . . . . . . . . . . . . . . .  17
       9.3.3.  Virtual Network TLV . . . . . . . . . . . . . . . . .  17
       9.3.4.  Local Node Descriptors TLV  . . . . . . . . . . . . .  18
       9.3.5.  Remote Node Descriptors TLV . . . . . . . . . . . . .  18
       9.3.6.  Node Descriptors Sub-TLVs . . . . . . . . . . . . . .  19
       9.3.7.  Link Descriptors TLV  . . . . . . . . . . . . . . . .  20
       9.3.8.  Prefix Descriptors TLV  . . . . . . . . . . . . . . .  21
       9.3.9.  PCEP-LS Attributes  . . . . . . . . . . . . . . . . .  22
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