PCEP Extensions for Receiving SRLG Information
draft-dhody-pce-recv-srlg-00

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Last updated 2014-01-29
Replaces draft-dhody-pce-srlg-collection
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
PCE Working Group                                               D. Dhody
Internet-Draft                                                  F. Zhang
Intended status: Standards Track                                X. Zhang
Expires: August 2, 2014                              Huawei Technologies
                                                                V. Lopez
                                                     O. Gonzalez de Dios
                                                          Telefonica I+D
                                                        January 29, 2014

             PCEP Extensions for Receiving SRLG Information
                      draft-dhody-pce-recv-srlg-00

Abstract

   The Path Computation Element (PCE) provides functions of path
   computation in support of traffic engineering in networks controlled
   by Multi-Protocol Label Switching (MPLS) and Generalized MPLS
   (GMPLS).

   This document provides extensions for the Path Computation Element
   Protocol (PCEP) to receive Shared Risk Link Group (SRLG) information
   during path computation via encoding this information in the path
   computation reply message.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 2, 2014.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Dhody, et al.            Expires August 2, 2014                 [Page 1]
Internet-Draft                  PCE-SRLG                    January 2014

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  PCEP Requirements . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Extension to PCEP . . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  The Extension of the RP Object  . . . . . . . . . . . . .   4
     4.2.  SRLG Subobject in ERO . . . . . . . . . . . . . . . . . .   4
   5.  Other Considerations  . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Backward Compatibility  . . . . . . . . . . . . . . . . .   5
     5.2.  Confidentiality via PathKey . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   7.  Manageability Considerations  . . . . . . . . . . . . . . . .   6
     7.1.  Control of Function and Policy  . . . . . . . . . . . . .   6
     7.2.  Information and Data Models . . . . . . . . . . . . . . .   6
     7.3.  Liveness Detection and Monitoring . . . . . . . . . . . .   6
     7.4.  Verify Correct Operations . . . . . . . . . . . . . . . .   6
     7.5.  Requirements On Other Protocols . . . . . . . . . . . . .   6
     7.6.  Impact On Network Operations  . . . . . . . . . . . . . .   6
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  New Subobjects for the ERO Object . . . . . . . . . . . .   7
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   7
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   7
     10.2.  Informative References . . . . . . . . . . . . . . . . .   7
   Appendix A.  Contributor Addresses  . . . . . . . . . . . . . . .   9

1.  Introduction

   As per [RFC4655], PCE based path computation model is deployed in
   large, multi-domain, multi-region, or multi-layer networks.  In such
   case PCEs may cooperate with each other to provide end to end optimal
   path.

   It is important to understand which TE links in the network might be
   at risk from the same failures.  In this sense, a set of links may
   constitute a 'shared risk link group' (SRLG) if they share a resource
Show full document text