RSVP-TE Extensions in Support of End-to-End Generalized Multi-Protocol Label Switching (GMPLS) Recovery
RFC 4872

Network Working Group                                     J.P. Lang, Ed.
Request for Comments: 4872                                         Sonos
Updates: 3471                                            Y. Rekhter, Ed.
Category: Standards Track                                        Juniper
                                                   D. Papadimitriou, Ed.
                                                                 Alcatel
                                                                May 2007

              RSVP-TE Extensions in Support of End-to-End
      Generalized Multi-Protocol Label Switching (GMPLS) Recovery

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.

Copyright Notice

   Copyright (C) The IETF Trust (2007).

Abstract

   This document describes protocol-specific procedures and extensions
   for Generalized Multi-Protocol Label Switching (GMPLS) Resource
   ReSerVation Protocol - Traffic Engineering (RSVP-TE) signaling to
   support end-to-end Label Switched Path (LSP) recovery that denotes
   protection and restoration.  A generic functional description of
   GMPLS recovery can be found in a companion document, RFC 4426.

Table of Contents

  1. Introduction .....................................................3
   2. Conventions Used in This Document ...............................5
   3. Relationship to Fast Reroute (FRR) ..............................5
   4. Definitions .....................................................6
      4.1. LSP Identification .........................................6
      4.2. Recovery Attributes ........................................7
           4.2.1. LSP Status ..........................................7
           4.2.2. LSP Recovery ........................................8
      4.3. LSP Association ............................................9
   5. 1+1 Unidirectional Protection ...................................9
      5.1. Identifiers ...............................................10

Lang, et al.                Standards Track                     [Page 1]
RFC 4872       RSVP-TE Extensions for E2E GMPLS Recovery        May 2007

   6. 1+1 Bidirectional Protection ...................................10
      6.1. Identifiers ...............................................11
      6.2. End-to-End Switchover Request/Response ....................11
   7. 1:1 Protection with Extra-Traffic ..............................13
      7.1. Identifiers ...............................................14
      7.2. End-to-End Switchover Request/Response ....................15
      7.3. 1:N (N > 1) Protection with Extra-Traffic .................16
   8. Rerouting without Extra-Traffic ................................17
      8.1. Identifiers ...............................................19
      8.2. Signaling Primary LSPs ....................................19
      8.3. Signaling Secondary LSPs ..................................19
   9. Shared-Mesh Restoration ........................................20
      9.1. Identifiers ...............................................22
      9.2. Signaling Primary LSPs ....................................22
      9.3. Signaling Secondary LSPs ..................................23
   10. LSP Preemption ................................................23
   11. (Full) LSP Rerouting ..........................................25
      11.1. Identifiers ..............................................25
      11.2. Signaling Reroutable LSPs ................................26
   12. Reversion .....................................................26
   13. Recovery Commands .............................................29
   14. PROTECTION Object .............................................31
      14.1. Format ...................................................31
      14.2. Processing ...............................................33
   15. PRIMARY_PATH_ROUTE Object .....................................33
      15.1. Format ...................................................34
      15.2. Subobjects ...............................................34
      15.3. Applicability ............................................35
      15.4. Processing ...............................................36
   16. ASSOCIATION Object ............................................37
      16.1. Format ...................................................37
      16.2. Processing ...............................................38
   17. Updated RSVP Message Formats ..................................39