Updates to the Resource Reservation Protocol for Fast Reroute of Traffic Engineering GMPLS Label Switched Paths (LSPs)
RFC 8271

Document Type RFC - Proposed Standard (October 2017; No errata)
Updates RFC 4090
Last updated 2017-10-31
Replaces draft-tsaad-ccamp-rsvpte-bidir-lsp-fastreroute
Stream IETF
Formats plain text pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Vishnu Beeram
Shepherd write-up Show (last changed 2017-03-24)
IESG IESG state RFC 8271 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Deborah Brungard
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                        M. Taillon
Request for Comments: 8271                                  T. Saad, Ed.
Updates: 4090                                             R. Gandhi, Ed.
Category: Standards Track                                         Z. Ali
ISSN: 2070-1721                                      Cisco Systems, Inc.
                                                               M. Bhatia
                                                                   Nokia
                                                            October 2017

    Updates to the Resource Reservation Protocol for Fast Reroute of
         Traffic Engineering GMPLS Label Switched Paths (LSPs)

Abstract

   This document updates the Resource Reservation Protocol - Traffic
   Engineering (RSVP-TE) Fast Reroute (FRR) procedures defined in RFC
   4090 to support Packet Switch Capable (PSC) Generalized Multiprotocol
   Label Switching (GMPLS) Label Switched Paths (LSPs).  These updates
   allow the coordination of a bidirectional bypass tunnel assignment
   protecting a common facility in both forward and reverse directions
   of a co-routed bidirectional LSP.  In addition, these updates enable
   the redirection of bidirectional traffic onto bypass tunnels that
   ensure the co-routing of data paths in the forward and reverse
   directions after FRR and avoid RSVP soft-state timeout in the control
   plane.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8271.

Taillon, et al.              Standards Track                    [Page 1]
RFC 8271                  FRR for TE GMPLS LSPs             October 2017

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://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.

Taillon, et al.              Standards Track                    [Page 2]
RFC 8271                  FRR for TE GMPLS LSPs             October 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   5
     2.1.  Key Word Definitions  . . . . . . . . . . . . . . . . . .   5
     2.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   5
     2.3.  Abbreviations . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Fast Reroute for Unidirectional GMPLS LSPs  . . . . . . . . .   6
   4.  Bypass Tunnel Assignment for Bidirectional GMPLS LSPs . . . .   7
     4.1.  Bidirectional GMPLS Bypass Tunnel Direction . . . . . . .   7
     4.2.  Merge Point Labels  . . . . . . . . . . . . . . . . . . .   7
     4.3.  Merge Point Addresses . . . . . . . . . . . . . . . . . .   7
     4.4.  RRO IPv4/IPv6 Subobject Flags . . . . . . . . . . . . . .   8
     4.5.  Bidirectional Bypass Tunnel Assignment Coordination . . .   8
       4.5.1.  Bidirectional Bypass Tunnel Assignment Signaling
               Procedure . . . . . . . . . . . . . . . . . . . . . .   8
       4.5.2.  One-to-One Bidirectional Bypass Tunnel Assignment . .  10
       4.5.3.  Multiple Bidirectional Bypass Tunnel Assignments  . .  10
   5.  Fast Reroute for Bidirectional GMPLS LSPs with In-Band
       Signaling . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     5.1.  Link Protection for Bidirectional GMPLS LSPs  . . . . . .  12
       5.1.1.  Behavior after Link Failure . . . . . . . . . . . . .  13
       5.1.2.  Revertive Behavior after Fast Reroute . . . . . . . .  13
     5.2.  Node Protection for Bidirectional GMPLS LSPs  . . . . . .  13
       5.2.1.  Behavior after Link Failure . . . . . . . . . . . . .  14
       5.2.2.  Behavior after Link Failure to Restore Co-routing . .  14
       5.2.3.  Revertive Behavior after Fast Reroute . . . . . . . .  16
       5.2.4.  Behavior after Node Failure . . . . . . . . . . . . .  16
     5.3.  Unidirectional Link Failures  . . . . . . . . . . . . . .  16
Show full document text