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OSPF Protocol Extensions for Path Computation Element (PCE) Discovery (RFC5088)

IP.com Disclosure Number: IPCOM000166281D
Original Publication Date: 2008-Jan-01
Included in the Prior Art Database: 2008-Jan-08
Document File: 21 page(s) / 41K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

JL. Le Roux: AUTHOR [+6]

Abstract

There are various circumstances where it is highly desirable for a Path Computation Client (PCC) to be able to dynamically and automatically discover a set of Path Computation Elements (PCEs), along with information that can be used by the PCC for PCE selection. When the PCE is a Label Switching Router (LSR) participating in the Interior Gateway Protocol (IGP), or even a server participating passively in the IGP, a simple and efficient way to announce PCEs consists of using IGP flooding. For that purpose, this document defines extensions to the Open Shortest Path First (OSPF) routing protocol for the advertisement of PCE Discovery information within an OSPF area or within the entire OSPF routing domain.

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This is the abbreviated version, containing approximately 6% of the total text.

 Network Working Group                                   JL. Le Roux, Ed. Request for Comments: 5088                                France Telecom Category: Standards Track                               JP. Vasseur, Ed.                                                        Cisco System Inc.                                                               Y. Ikejiri                                                       NTT Communications                                                                 R. Zhang                                                                       BT                                                             January 2008

  OSPF Protocol Extensions for Path Computation Element (PCE) Discovery

Status of This Memo

   This document specifies an Internet standards track protocol for the    Internet community, and requests discussion and suggestions for    improvements.  Please refer to the current edition of the "Internet    Official Protocol Standards" (STD 1) for the standardization state    and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   There are various circumstances where it is highly desirable for a    Path Computation Client (PCC) to be able to dynamically and    automatically discover a set of Path Computation Elements (PCEs),    along with information that can be used by the PCC for PCE selection.    When the PCE is a Label Switching Router (LSR) participating in the    Interior Gateway Protocol (IGP), or even a server participating    passively in the IGP, a simple and efficient way to announce PCEs    consists of using IGP flooding.  For that purpose, this document    defines extensions to the Open Shortest Path First (OSPF) routing    protocol for the advertisement of PCE Discovery information within an    OSPF area or within the entire OSPF routing domain.

 Le Roux, et al.             Standards Track                     [Page 1]
 RFC 5088       OSPF Protocol Extensions for PCE Discovery   January 2008

 Table of Contents

   1. Introduction ....................................................2

   2. Terminology .....................................................4

   3. Overview ........................................................5

      3.1. PCE Discovery Information ..................................5

      3.2. Flooding Scope ....................................