Allocation of a Generic Associated Channel Type for ITU-T MPLS Transport Profile Operation, Maintenance, and Administration (MPLS-TP OAM)
Author(s): Malcolm Betts
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....
Network Working Group M. Betts Internet Draft ZTE Intended status: Informational April 10, 2012 Expires: October 10, 2012 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 Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html This Internet-Draft will expire on October 10, 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 (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. Betts Expires October 10, 2012 [Page 1] Internet-Draft G-ACh type for G.8113.1 OAM April 2012 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. 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], 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, this document requests IANA to assign a G- ACh Type for use by the ITU-T for [G.8113.1]. This G-ACh type shall be 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 [I-D.sprecher-mpls-tp-oam-considerations]. 2. Conventions used in this document 2.1. Requirements 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]. Betts Expires October 10, 2012 [Page 2] Internet-Draft G-ACh type for G.8113.1 OAM April 2012 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, 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, 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. All ITU-T Recommendations are subject to updates by errata, corrigenda, amendments or complete revisions. In any update of [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 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 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." 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 Associated Channel Types as a subregistry of the Pseudowire Name Spaces registry. IANA is requested to allocate 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. Betts Expires October 10, 2012 [Page 3] Internet-Draft G-ACh type for G.8113.1 OAM April 2012 6. References 6.1. Normative References [RFC2119] Key words for use in RFCs to Indicate Requirement Levels, BCP 14, RFC2119, March 1997 [RFC5586] MPLS Generic Associated Channel, RFC5586, June 2009 [RFC5654] Requirements of an MPLS Transport Profile, September 2009 [RFC5860] Requirements for Operations, Administration, and Maintenance (OAM) in MPLS Transport Networks, RFC5860, May 2010 [G.8113.1] ITU-T 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) [Y.1731] ITU-T Recommendation ''OAM functions and mechanisms for Ethernet based networks'' 7/2007 as updated by Corrigendum 1, 10/2011, http://www.itu.int/rec/T-REC-Y.1731/en 6.2. Informative References [LS370] Liaison statement from ITU-T SG 15, https://datatracker.ietf.org/liaison/1125/ [I-D.ietf-mpls-tp-oam-analysis] Sprecher, N., and Fang, L., "An Overview of the OAM Tool Set for MPLS based Transport Networks", draft-ietf-mpls- tp-oam-analysis, work in progress. [I-D.sprecher-mpls-tp-oam-considerations] Sprecher, N. and 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. Betts Expires October 10, 2012 [Page 4] Internet-Draft G-ACh type for G.8113.1 OAM April 2012 Author's Address Malcolm Betts ZTE Email: firstname.lastname@example.org Betts Expires October 10, 2012 [Page 5]