PCEP Extension for Distribution of Link-State and TE Information.
draft-dhodylee-pce-pcep-ls-08

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Last updated 2017-06-27
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 29, 2017                                 D. Ceccarelli
                                                                Ericsson
                                                           June 27, 2017

   PCEP Extension for Distribution of Link-State and TE Information.
                     draft-dhodylee-pce-pcep-ls-08

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.

Status of This Memo

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   This Internet-Draft will expire on December 29, 2017.

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   This document is subject to BCP 78 and the IETF Trust's Legal
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   publication of this document.  Please review these documents

Dhody, et al.           Expires December 29, 2017               [Page 1]
Internet-Draft                   PCEP-LS                       June 2017

   carefully, as they describe your rights and restrictions with respect
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
   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  . . . . . . . . . . . . . . . .   7
     6.3.  Initial Link-State (and TE) Synchronization . . . . . . .   8
       6.3.1.  Optimizations for LS Synchronization  . . . . . . . .  10
     6.4.  LS Report . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  Transport . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   8.  PCEP Messages . . . . . . . . . . . . . . . . . . . . . . . .  11
     8.1.  LS Report Message . . . . . . . . . . . . . . . . . . . .  11
     8.2.  The PCErr Message . . . . . . . . . . . . . . . . . . . .  12
   9.  Objects and TLV . . . . . . . . . . . . . . . . . . . . . . .  12
     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  . . . . . . . . . . . . . . . .  15
       9.3.2.  Route Distinguisher TLV . . . . . . . . . . . . . . .  16
       9.3.3.  Virtual Network TLV . . . . . . . . . . . . . . . . .  17
       9.3.4.  Local Node Descriptors TLV  . . . . . . . . . . . . .  17
       9.3.5.  Remote Node Descriptors TLV . . . . . . . . . . . . .  18
       9.3.6.  Node Descriptors Sub-TLVs . . . . . . . . . . . . . .  19
       9.3.7.  Link Descriptors TLV  . . . . . . . . . . . . . . . .  19
       9.3.8.  Prefix Descriptors TLV  . . . . . . . . . . . . . . .  20
       9.3.9.  PCEP-LS Attributes  . . . . . . . . . . . . . . . . .  21
         9.3.9.1.  Node Attributes TLV . . . . . . . . . . . . . . .  21
         9.3.9.2.  Link Attributes TLV . . . . . . . . . . . . . . .  22
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