Requirements for MPLS Transport Profile (MPLS-TP) Shared Mesh Protection
RFC 7412

Document Type RFC - Informational (December 2014; No errata)
Last updated 2015-10-14
Replaces draft-weingarten-mpls-smp-requirements
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IESG IESG state RFC 7412 (Informational)
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Internet Engineering Task Force (IETF)                     Y. Weingarten
Request for Comments: 7412
Category: Informational                                        S. Aldrin
ISSN: 2070-1721                                      Huawei Technologies
                                                                  P. Pan
                                                                Infinera
                                                                 J. Ryoo
                                                                    ETRI
                                                               G. Mirsky
                                                                Ericsson
                                                           December 2014

           Requirements for MPLS Transport Profile (MPLS-TP)
                         Shared Mesh Protection

Abstract

   This document presents the basic network objectives for the behavior
   of Shared Mesh Protection (SMP) that are not based on control-plane
   support.  This document provides an expansion of the basic
   requirements presented in RFC 5654 ("Requirements of an MPLS
   Transport Profile") and RFC 6372 ("MPLS Transport Profile (MPLS-TP)
   Survivability Framework").  This document provides requirements for
   any mechanism that would be used to implement SMP for MPLS-TP data
   paths, in networks that delegate protection switch coordination to
   the data plane.

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 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/rfc7412.

Weingarten, et al.            Informational                     [Page 1]
RFC 7412                  MPLS SMP Requirements            December 2014

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.  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. Terminology and Notation ........................................3
      2.1. Acronyms and Terminology ...................................4
   3. Shared Mesh Protection Reference Model ..........................4
      3.1. Protection or Restoration ..................................5
      3.2. Scope of Document ..........................................5
           3.2.1. Relationship to MPLS ................................5
   4. SMP Architecture ................................................6
      4.1. Coordination of Resources ..................................8
      4.2. Control Plane or Data Plane ................................8
   5. SMP Network Objectives ..........................................9
      5.1. Resource Reservation and Coordination ......................9
           5.1.1. Checking Resource Availability for Multiple
                  Protection Paths ....................................9
      5.2. Multiple Triggers .........................................10
           5.2.1. Soft Preemption ....................................10
           5.2.2. Hard Preemption ....................................10
      5.3. Notification ..............................................11
      5.4. Reversion .................................................11
      5.5. Protection Switching Time .................................11
      5.6. Timers ....................................................12
      5.7. Communication Channel and Fate-Sharing ....................12
   6. Manageability Considerations ...................................13
   7. Security Considerations ........................................13
   8. Normative References ...........................................13
   Acknowledgements ..................................................15
   Contributors ......................................................15
   Authors' Addresses ................................................16
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