RSVP-TE Signaling Procedure for End-to-End GMPLS Restoration and Resource Sharing
RFC 8131

Document Type RFC - Informational (March 2017; No errata)
Last updated 2017-03-22
Replaces draft-ietf-ccamp-gmpls-resource-sharing-proc
Stream IETF
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Stream WG state Submitted to IESG for Publication (wg milestone: Jan 2016 - Submit Resource shar... )
Document shepherd Vishnu Beeram
Shepherd write-up Show (last changed 2016-10-27)
IESG IESG state RFC 8131 (Informational)
Consensus Boilerplate Yes
Telechat date
Responsible AD Deborah Brungard
Send notices to (None)
IANA IANA review state IANA OK - No Actions Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                          X. Zhang
Request for Comments: 8131                                 H. Zheng, Ed.
Category: Informational                              Huawei Technologies
ISSN: 2070-1721                                           R. Gandhi, Ed.
                                                                  Z. Ali
                                                     Cisco Systems, Inc.
                                                           P. Brzozowski
                                                            ADVA Optical
                                                              March 2017

                      RSVP-TE Signaling Procedure for
             End-to-End GMPLS Restoration and Resource Sharing

Abstract

   In non-packet transport networks, there are requirements where the
   Generalized Multiprotocol Label Switching (GMPLS) end-to-end recovery
   scheme needs to employ a restoration Label Switched Path (LSP) while
   keeping resources for the working and/or protecting LSPs reserved in
   the network after the failure occurs.

   This document reviews how the LSP association is to be provided using
   Resource Reservation Protocol - Traffic Engineering (RSVP-TE)
   signaling in the context of a GMPLS end-to-end recovery scheme when
   using restoration LSP where failed LSP is not torn down.  In
   addition, this document discusses resource sharing-based setup and
   teardown of LSPs as well as LSP reversion procedures.  No new
   signaling extensions are defined by this document, and it is strictly
   informative in nature.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see 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
   http://www.rfc-editor.org/info/rfc8131.

Zhang, et al.                 Informational                     [Page 1]
RFC 8131         GMPLS Restoration and Resource Sharing       March 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
   (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 ....................................................3
   2. Conventions Used in This Document ...............................4
      2.1. Terminology ................................................4
      2.2. Abbreviations ..............................................4
   3. Overview ........................................................4
      3.1. Examples of Restoration Schemes ............................5
           3.1.1. 1+R Restoration .....................................5
           3.1.2. 1+1+R Restoration ...................................6
                  3.1.2.1. 1+1+R Restoration - Variants ...............7
      3.2. Resource Sharing by Restoration LSP ........................7
   4. RSVP-TE Signaling Procedure .....................................8
      4.1. Restoration LSP Association ................................8
      4.2. Resource Sharing-Based Restoration LSP Setup ...............8
      4.3. LSP Reversion .............................................10
           4.3.1. Make-While-Break Reversion .........................10
           4.3.2. Make-Before-Break Reversion ........................11
   5. Security Considerations ........................................12
   6. IANA Considerations ............................................13
   7. References .....................................................13
      7.1. Normative References ......................................13
      7.2. Informative References ....................................13
   Acknowledgements  .................................................14
   Contributors ......................................................14
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