Liaison Response to ITU-T SG 13 on "Requirements for Support of Stateful Flow-Aware Transport Technology in Next Generation Networks"
|From Contact||Lars Eggert|
|To Groups||ITU-T-SG-11, ITU-T-SG-13|
|Attachments||Procedures for protocol extensions and variations|
The IESG and the IETF Transport and Routing Areas would like to thank ITU-T SG 13 Question 4 to bring our attention to its work on "Requirements for the Support of Stateful Flow-Aware Transport Technology in Next Generation Networks (Y.flowreq)". We appreciate that the ITU-T is cooperating with the IETF when their Recommendations on Next Generation Networks involve IETF standards. We note that although Y.1221 itself was previously fully based on existing IETF standards, Amendment 2 to Y.1221 from November 2005 and Y.flowreq propose significant and fundamental changes to the Internet architecture and several of its core protocols and mechanisms. These include new congestion control methods, new authentication and authorization procedures, new signaling schemes and new methods for routing and traffic security. We appreciate that you are bringing these ideas to the IETF. When extensions to IETF protocols are made within the IETF, the normal IETF process includes IETF-wide expert review followed by review and approval by the IESG. This process attempts to ensure that extensions will conform to the applicable architectural principles and technical criteria. For extensions to IETF protocols proposed outside the IETF, the IESG has recently approved draft-carpenter-protocol-extensions  to be published as an RFC. This document, created with considerable help from ITU-T representatives, defines guideline procedures for cooperation between the IETF and outside entities on the extension of IETF protocols. These guidelines are based on successful interactions between the IETF and other SDOs, including ITU-T, in diverse technical areas including IPv6, MPLS, GMPLS, NSIS, RSVP, and SIP. We recommend that these guidelines form the basis for the cooperation between the IETF and ITU-T with regards to Y.flowreq and invite those promoting flow-state-aware forwarding to bring their ideas to the IETF in the form of Internet Drafts and perhaps presentations, so that they can be discussed by the full body of experts in the areas it covers. We are pleased that some proponents of flow-state-aware forwarding have asked about the possibility of discussing the ideas at the next IETF meeting. We encourage them to come and participate.  S. Bradner, B. Carpenter and T. Narten. Procedures for protocol extensions and variations. Internet Draft draft-carpenter-protocol- extensions-04 (Work in Progress), October 2006.