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Pre-standard Linear Protection Switching in MPLS Transport Profile (MPLS-TP)
RFC 7347

Document type: RFC - Informational (September 2014; No errata)
Document stream: ISE
Last updated: 2014-09-11
Other versions: plain text, pdf, html
IETF Conflict Review: conflict-review-zulr-mpls-tp-linear-protection-switching

ISE State: Published RFC
Document shepherd: Nevil Brownlee
Shepherd Write-Up: Last changed 2014-02-20

IESG State: RFC 7347 (Informational)
IANA Review State: IANA OK - No Actions Needed
IANA Action State: No IC
Responsible AD: (None)
Send notices to: No addresses provided

Independent Submission                              H. van Helvoort, Ed.
Request for Comments: 7347                           Huawei Technologies
Category: Informational                                     J. Ryoo, Ed.
ISSN: 2070-1721                                                     ETRI
                                                                H. Zhang
                                                     Huawei Technologies
                                                                F. Huang
                                                                 Philips
                                                                   H. Li
                                                            China Mobile
                                                         A. D'Alessandro
                                                          Telecom Italia
                                                          September 2014

              Pre-standard Linear Protection Switching in
                    MPLS Transport Profile (MPLS-TP)

Abstract

   The IETF Standards Track solution for MPLS Transport Profile
   (MPLS-TP) Linear Protection is provided in RFCs 6378, 7271, and 7324.

   This document describes the pre-standard implementation of MPLS-TP
   Linear Protection that has been deployed by several network operators
   using equipment from multiple vendors.  At the time of publication,
   these pre-standard implementations were still in operation carrying
   live traffic.

   The specified mechanism supports 1+1 unidirectional/bidirectional
   protection switching and 1:1 bidirectional protection switching.  It
   is purely supported by the MPLS-TP data plane and can work without
   any control plane.

van Helvoort, et al.          Informational                     [Page 1]
RFC 7347        Pre-standard MPLS-TP Lin. Prot. Switching September 2014

Status of This Memo

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

   This is a contribution to the RFC Series, independently of any other
   RFC stream.  The RFC Editor has chosen to publish this document at
   its discretion and makes no statement about its value for
   implementation or deployment.  Documents approved for publication by
   the RFC Editor are not a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   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/rfc7347.

Copyright Notice

   Copyright (c) 2014 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.

van Helvoort, et al.          Informational                     [Page 2]
RFC 7347        Pre-standard MPLS-TP Lin. Prot. Switching September 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   5
   3.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Linear Protection-Switching Overview  . . . . . . . . . . . .   6
     4.1.  Protection Architecture Types . . . . . . . . . . . . . .   6
       4.1.1.  1+1 Architecture  . . . . . . . . . . . . . . . . . .   6
       4.1.2.  1:1 Architecture  . . . . . . . . . . . . . . . . . .   6
       4.1.3.  1:n Architecture  . . . . . . . . . . . . . . . . . .   7
     4.2.  Protection Switching Type . . . . . . . . . . . . . . . .   7
     4.3.  Protection Operation Type . . . . . . . . . . . . . . . .   7
   5.  Protection-Switching Trigger Conditions . . . . . . . . . . .   8
     5.1.  Fault Conditions  . . . . . . . . . . . . . . . . . . . .   8
     5.2.  External Commands . . . . . . . . . . . . . . . . . . . .   8
       5.2.1.  End-to-End Commands . . . . . . . . . . . . . . . . .   8
       5.2.2.  Local Commands  . . . . . . . . . . . . . . . . . . .   9
   6.  Protection-Switching Schemes  . . . . . . . . . . . . . . . .  10
     6.1.  1+1 Unidirectional Protection Switching . . . . . . . . .  10
     6.2.  1+1 Bidirectional Protection Switching  . . . . . . . . .  11
     6.3.  1:1 Bidirectional Protection Switching  . . . . . . . . .  12
   7.  APS Protocol  . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.1.  APS PDU Format  . . . . . . . . . . . . . . . . . . . . .  13
     7.2.  APS Transmission  . . . . . . . . . . . . . . . . . . . .  16

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