Network Working Group M. Betts Internet Draft ZTE Intended status: Informational February 20, 2012 Expires: August 20, 2012 Allocation of an Associated Channel Code Point for Use by ITU-T Ethernet based OAM draft-betts-itu-oam-ach-code-point-03.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 August 20, 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 August 20, 2012 [Page 1] Internet-Draft ACh code point for Ethernet OAM February 2012 Abstract This document assigns an Associated Channel Type code point for carrying Ethernet based Operations, Administration, and Management messages in the MPLS Generic Associated Channel (G-ACh). 1. Introduction MPLS-TP 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 intended to meet the OAM functional requirements defined in [RFC5860]. The ITU-T has documented, in draft new Recommendation [G.8113.1], the use of Ethernet based OAM mechanisms, originally defined in [Y.1731], carried in the MPLS Generic Associated Channel (G-ACh). This approach requires the allocation of an ACH Type from the registry of ACH types maintained by IANA in order that the messages that will be described in [G.8113.1] can be identified by an implementation. To fulfill the request from ITU-T SG15 in [LS370] and to allow deployment of an Ethernet based OAM solution without continuing to resorting to the use of an experimental ACH Type, this document requests IANA to assign an ACH Type code point for use by the ITU-T. The ACH type shall be known as the Ethernet based OAM 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. Scope of the Ethernet based OAM ACH Type The code point allocated by this document is intended to be used only for Ethernet based OAM messages, defined in the ITU-T Recommendation [G.8113.1], carried in the G-ACh . These Ethernet based OAM messages and procedures, address the OAM functional requirements defined in [RFC5860]. Other message types should not be carried behind this code point. This code point may be used on any transport construct that uses the G-ACh, e.g., MPLS-TP Sections, MPLS-TP LSPs or PWs. Betts Expires August 20, 2012 [Page 2] Internet-Draft ACh code point for Ethernet OAM February 2012 All ITU-T Recommendations are subject to revisions. Therefore, the code point allocated by this document may be used for future versions of [G.8113.1]. 3. Security Considerations As noted in [RFC5586], when new ACH Types are defined the "security considerations must be described in the relevant associated channel type." Thus, any specification of messages to be carried on the Ethernet OAM ACH Type must include the necessary security considerations. The IETF takes this opportunity to remind the ITU-T of the need to describe security considerations in [G.8113.1]. 4. 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 code point as follows: Value Description TLV Follows Reference ----------- ----------------------- ----------- --------- TBD Ethernet based OAM No [This.I-D] A value of 0x8902 is suggested. 5. References 5.1. Normative References [RFC5586] Vigoureux, M., Bocci, M., Swallow, G., Ward, D., Aggarwal, R., "MPLS Generic Associated Channel", RFC 5586, June 2009 [RFC5860] Requirements for Operations, Administration, and Maintenance (OAM) in MPLS Transport Networks, RFC5860, May 2010 [G.8113.1] Determined ITU-T draft Recommendation "Operations, Administration and Maintenance mechanism for MPLS-TP in Packet Transport Network (PTN)", https://datatracker.ietf.org/documents/LIAISON/file1307.pdf [Y.1731] ITU-T Recommendation "OAM functions and mechanisms for Ethernet based networks" 7/2007 as updated by Corrigendum 1, 10/2011, https://datatracker.ietf.org/liaison/1100/ Betts Expires August 20, 2012 [Page 3] Internet-Draft ACh code point for Ethernet OAM February 2012 5.2. 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. 6. Acknowledgments This document was prepared using 2-Word-v2.0.template.dot. Betts Expires August 20, 2012 [Page 4] Internet-Draft ACh code point for Ethernet OAM February 2012 Authors' Addresses Malcolm Betts ZTE Email: malcolm.betts@zte.com.cn Betts Expires August 20, 2012 [Page 5]