Network Working Group
Internet Engineering Task Force (IETF)                          M. Betts
Internet Draft
Request for Comments: 6671                                           ZTE
Intended status:
Category: Informational                           April 10, 2012
Expires: October 10,                                        July 2012
ISSN: 2070-1721

       Allocation of a Generic Associated Channel Type for ITU-T
   MPLS Transport Profile Operation, Maintenance, and Administration
                             (MPLS-TP OAM)
                 draft-betts-itu-oam-ach-code-point-04.txt

Abstract

   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
   Channel.

Status of this This Memo

   This Internet-Draft document is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working
   (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 as Internet-
   Drafts.

   Internet-Drafts
   approved by the IESG are draft documents valid for a maximum candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of six
   months this document, any errata,
   and how to provide feedback on it may be updated, replaced, or obsoleted by other documents obtained at any time.  It is inappropriate to use Internet-Drafts as
   reference material or to cite them other than as "work in progress."
   http://www.rfc-editor.org/info/rfc6671.

IESG Note

   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 current Internet-Drafts
   the relevant RFCs can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt found in RFC 6669.  The list approval of Internet-Draft Shadow Directories can 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 accessed at
   http://www.ietf.org/shadow.html

   This Internet-Draft will expire on October 10, 2012. implemented.

Copyright Notice

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   document authors.  All rights reserved.

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   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
   [I-D.ietf-mpls-tp-oam-analysis], [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'' 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, this document requests IANA to assign has assigned a G-
   ACh G-ACh Type <TBD-value>
   for use by the ITU-T for [G.8113.1].  This G-ACh type shall
   be Type is known as the G.8113.1
   "G.8113.1 OAM G-ACh Type. 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
   [I-D.sprecher-mpls-tp-oam-considerations]. [RFC6670].

2.  Conventions used Used in this document This Document

2.1.  Requirements notation Notation

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   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
   G-ACh
   type, Type are restricted to only those that address the OAM
   functional requirements defined in [RFC5860].  Other message types
   MUST NOT be carried behind this G-ACh type. Type.

   All ITU-T Recommendations are subject to updates by errata,
   corrigenda, amendments amendments, or complete revisions.  In any update of
   [G.8113.1]
   [G.8113.1], the G-ACh Type assigned by this document MUST NOT be used
   for any functions not identified as OAM functional requirements in
   [RFC5860].  An update of [G.8113.1] may use the G-ACh Type assigned
   by this document to support the OAM functions identified in
   [RFC5860].  When an amendment or complete revision of G.8113.1 is
   approved
   approved, the reference to [G.8113.1], provided in this document,
   should be updated to show the approval date of the new version.

   The G-ACh Type assigned by this document may be used on any transport
   construct that uses the G-ACh, e.g., MPLS-TP Sections, MPLS-TP LSPs LSPs,
   or PWs as described in [G.8113.1].

4.  Security Considerations

   As noted in [RFC5586], when new G-ACh Types are defined, the
   "security considerations MUST be described in the relevant associated
   channel type specification." specification".  The IETF takes this opportunity to
   remind the ITU-T of the need to describe security considerations in
   [G.8113.1].

5.  IANA Considerations

   IANA maintains a registry of Pseudowire the "Pseudowire Associated Channel Types as
   a subregistry Types" sub-registry
   of the Pseudowire "Pseudowire Name Spaces (PWE3)" registry.

   IANA is requested to allocate has allocated a new G-ACh Type as follows:

      Value        Description              TLV Follows  Reference
      -----------  -----------------------  -----------  ---------
      TBD          G.8113.1 OAM             No           [This.I-D]

   A value of 0x8902 is suggested.           [RFC6671]

6.  References

6.1.  Normative References

   [RFC2119] Key  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels, Levels", BCP 14, RFC 2119, March 1997 1997.

   [RFC5586] MPLS  Bocci, M., Ed., Vigoureux, M., Ed., and S. Bryant, Ed.,
              "MPLS Generic Associated Channel, Channel", RFC 5586, June 2009 2009.

   [RFC5654] Requirements  Niven-Jenkins, B., Ed., Brungard, D., Ed., Betts, M., Ed.,
              Sprecher, N., and S. Ueno, "Requirements of an MPLS
              Transport Profile, Profile", RFC 5654, September 2009 2009.

   [RFC5860] Requirements  Vigoureux, M., Ed., Ward, D., Ed., and M. Betts, Ed.,
              "Requirements for Operations, Administration, and
              Maintenance (OAM) in MPLS Transport Networks, RFC5860, Networks", RFC 5860,
              May
             2010 2010.

   [G.8113.1] ITU-T Recommendation ''Operations, Recommendation, "Operations, Administration and
              Maintenance mechanism for MPLS-TP in Packet Transport
              Network (PTN)'' 10/12,
             http://www.itu.int/rec/T-REC-G.8113.1/en
             (Note to RFC editor: This link will become valid after
             G.8113.1 is approved) (PTN)", <date>,
              http://www.itu.int/rec/T-REC-G.8113.1/en.

   [Y.1731]   ITU-T Recommendation ''OAM Recommendation, "OAM functions and mechanisms for
              Ethernet based networks'' networks" 7/2007 as updated by Corrigendum
              1, 10/2011, http://www.itu.int/rec/T-REC-Y.1731/en http://www.itu.int/rec/T-REC-Y.1731/en.

6.2.  Informative References

   [LS370]  Liaison statement from    "Liaison Statement: LS370 - Current status of
              Recommendation ITU-T SG 15,
             https://datatracker.ietf.org/liaison/1125/

   [I-D.ietf-mpls-tp-oam-analysis] G.8113.1/Y.1372.1, Operations,
              Administration and Maintenance mechanism for MPLS-TP in
              Packet Transport Network (PTN)", January 2012,
              https://datatracker.ietf.org/liaison/1125/.

   [RFC6669]  Sprecher, N., N. and L. Fang, L., "An Overview of the OAM Operations,
              Administration, and Maintenance (OAM) Tool Set for  MPLS based MPLS-
              Based Transport Networks", draft-ietf-mpls-
             tp-oam-analysis, work in progress.

   [I-D.sprecher-mpls-tp-oam-considerations] RFC 6669, July 2012.

   [RFC6670]  Sprecher, N. and KY. Hong, KY., "The Reasons for Selecting a
              Single Solution for MPLS-TP OAM", draft-sprecher-mpls-tp-
             oam-considerations, work in progress.

7. Acknowledgments

   This document was prepared using 2-Word-v2.0.template.dot. MPLS Transport Profile (MPLS-TP)
              Operations, Administration, and Maintenance (OAM)", RFC
              6670, July 2012.

Author's Address

   Malcolm Betts
   ZTE

   Email:

   EMail: malcolm.betts@zte.com.cn