Architecture and Requirement for Distribution of Link-State and TE Information via PCEP.
draft-leedhody-teas-pcep-ls-03

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TEAS Working Group                                      Y. Lee (Editor)
                                                   Dhruv Dhody (Editor)
Internet Draft                                                   Huawei
Intended Status: Informational
Expires: March 2017                                  Daniele Ceccarelli
                                                               Ericsson

                                                     September 14, 2016

    Architecture and Requirement for Distribution of Link-State and TE
                           Information via PCEP.

                      draft-leedhody-teas-pcep-ls-03

Abstract

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

   This document provides possible architectural alternatives for link-
   state and TE information distribution and their potential impacts on
   PCE, network nodes, routing protocols etc.

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Table of Contents

   1. Introduction...................................................3
   2. Applicability..................................................4
   3. Architecture Options...........................................6
      3.1. Option 1.1: All Nodes Send Local Link-State and TE Info to
      all PCEs......................................................10
      3.2. Option 1.2: Each Node Sends Local Link-State and TE Info to
      one PCE.......................................................10
      3.3. Option 2.1: Designated Node(s) Send Local and Remote Link-
      State and TE Info to all PCEs.................................11
      3.4. Key Architectural Issues.................................13
         3.4.1. Nodes Finding PCEs..................................13
         3.4.2. Node TE Information Update Procedures...............13
         3.4.3. PCE Link-state (and TE) Resource Information
         Maintenance Procedures.....................................14
   4. Requirements for PCEP extension...............................14
   5. New Functions to distribute link-state and TE via PCEP........14
   6. Security Considerations.......................................15
   7. IANA Considerations...........................................15

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   8. References....................................................15
      8.1. Normative References.....................................15
      8.2. Informative References...................................16
   Author's Addresses...............................................18

1. Introduction

   In Multiprotocol Label Switching (MPLS) and Generalized MPLS
   (GMPLS), a Traffic Engineering Database (TED) is used in computing
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