Allocation of a Generic Associated Channel Type for ITU-T MPLS Transport Profile Operation, Maintenance, and Administration (MPLS-TP OAM)
RFC 6671

Document Type RFC - Informational (November 2012; No errata)
Was draft-betts-itu-oam-ach-code-point (individual in rtg area)
Last updated 2015-10-14
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Internet Engineering Task Force (IETF)                          M. Betts
Request for Comments: 6671                                           ZTE
Category: Informational                                    November 2012
ISSN: 2070-1721

       Allocation of a Generic Associated Channel Type for ITU-T
   MPLS Transport Profile Operation, Maintenance, and Administration
                             (MPLS-TP OAM)


   This document assigns a Generic Associated Channel (G-ACh) Type for
   carrying ITU-T MPLS Transport Profile Operations, Administration, and
   Management (MPLS-TP OAM) messages in the MPLS Generic Associated

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


   The IESG notes that the IETF has developed a set of OAM tools for
   MPLS-TP that have been published as Standards Track RFCs.  A list of
   the relevant RFCs can be found in RFC 6669.  The approval of this
   document and the assignment of an ACh Type does not constitute
   endorsement by the IETF of the alternate MPLS-TP OAM documented in
   G.8113.1.  The IESG recommends instead that the RFCs noted above
   should be implemented.

Betts                         Informational                     [Page 1]
RFC 6671               G-ACh Type for G.8113.1 OAM         November 2012

Copyright Notice

   Copyright (c) 2012 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
   ( 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.

1.  Introduction

   The Transport Profile of MPLS (MPLS-TP) defined in [RFC5654] is a
   profile of MPLS technology for use in packet transport networks.  The
   MPLS-TP profile includes a set of Operations, Administration, and
   Management (OAM) tools defined by the IETF [RFC6669] that are used to
   meet the OAM functional requirements defined in [RFC5860].

   ITU-T Recommendation [G.8113.1] documents MPLS-TP OAM.  This
   Recommendation builds upon Ethernet OAM as documented in [Y.1731].
   The messages in [G.8113.1] are defined to be carried in a new Generic
   Associated Channel (G-ACh) Type in the MPLS Generic Associated
   Channel.  In order to carry these messages in an interoperable
   fashion, a Generic Associated Channel Type from the IANA maintained
   registry "Pseudowire Associated Channel Types" is to be used.

   To fulfill the request from ITU-T SG15 in [LS370] and to allow
   deployment of the [G.8113.1] OAM solution without using an
   experimental G-ACh Type, IANA has assigned a G-ACh Type <0x8902> for
   use by the ITU-T for [G.8113.1].  This G-ACh Type is known as the
   "G.8113.1 OAM G-ACh Type".

   A number of experts in the IETF do not consider that the development
   or deployment of a second protocol solution within the same
   architectural problem space is necessary or advisable [RFC6670].

Betts                         Informational                     [Page 2]
RFC 6671               G-ACh Type for G.8113.1 OAM         November 2012

2.  Conventions Used in This Document

2.1.  Requirements Notation

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   document are to be interpreted as described in [RFC2119].

3.  Scope of the G.8113.1 OAM G-ACh Type

   The G-ACh Type assigned by this document MUST only be used for OAM
   messages, as defined in the ITU-T Recommendation [G.8113.1], carried
   in the G-ACh.  The OAM messages and procedures carried behind this
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