Stewart, We will issue this as a liaison TD to Working Party 4/13. The decision on the Recommendations, in line with ITU-T working procedures and practices, will taken by the study group after consideration by Q5/13 and Working Party 4/13 of the technical issues raised in contributions to the meeting. Brian. ----- Original Message ----- From: "Stewart Bryant" To: ; ; "Huub van Helvoort" ; "Q5/13" ; ; Cc: "Russ Housley" ; ; "IAB" ; "Mark Townsley" ; "Jari Arkko" ; "Ross Callon" ; "pwe3" ; ; "Danny McPherson" ; "Stewart Bryant" ; "George Swallow (swallow)" ; "Loa Andersson" ; Sent: Friday, January 11, 2008 2:03 PM Subject: Ad Hoc committee on T-MPLS issues with G.8113 and G.8114 > To: > > tsbsg13@itu.int > Georges Sebek > ITU-T SG13 Question 5 > Huub van Helvoort > Brian Moore > Neal Seitz > > > CC: > > Russ Housley > IESG > IAB > Mark Townsley > Jari Arkko > David Ward > Ross Callon > pwe3 > mpls@ietf.org > Danny McPherson > Stewart Bryant > George Swallow > Loa Andersson > > statements@ietf.org > > For Action: > > As a direct result of the activities at the Stuttgart > meeting, the IAB formed a technical Ad Hoc committee on > T-MPLS. It was chartered to prepare the IETF for the > proposed cooperation on T-MPLS between the IETF and ITU-T. > > At the IETF meeting in Vancouver the Ad Hoc committee was > approached by people active on T-MPLS in the ITU-T who > proposed a joint effort to resolve outstanding issues on > two OAM documents (G.8113 and G.8114) that are scheduled > for approval in Seoul January 2008. A very aggressive joint > plan to resolve the issues were created. Since then the Ad Hoc > committee put in a huge effort to review the relevant > documents and compiled a list of outstanding issues. The > list has more than 60 issues and the process of resolving > those has only just started. The compiled list of issues > is attached to this liaison. > > In addition, as the Ad Hoc committee further considered > the G.8114 design it became clear that it proposes > two applications for label 14, an endpoint OAM alert, a P > router OAM alert (i.e. requires the P router to take > special action on packets with label 14 in the stack), > and we have also see a proposal to further extend use > of label 14 to provide a messaging channel for > control plane traffic. In addition to the detailed > review of G.8113 and G.8114, the IETF MPLS and PWE3 Working > Groups therefore have to question whether the proposed > approach of using a single reserved label (or indeed > any reserved label) is the right approach for the > applications that SG13 have in mind, and we believe that > this should be added to the issues list as an > additional significant concern. > > The Ad Hoc committee on T-MPLS have come to the > conclusion that G.8113 and G.8114 are not ready to be > approved. This conclusion was endorsed by the Internet > and Routing Area Directors jointly responsible for > this technology. > > The outstanding issues include technical, architectural, > and procedural issues. We think it is important that > these documents be put "on hold" until these issues > are resolved. > > The method of resolving the issues should involve expedient > implementation of the proposed agreement that was drafted > in Stuttgart, should follow the MPLS change process, and > should be based on the liaison statement sent by the > IAB and IESG to you last summer. > > > The documents are available at: > > http://www.tla-group.com/~loa/IETF-TMPLS-Issues-6.pdf > > and are attached to this liaison. > > The issues list and the conclusions above represent the > consensus of the IETF MPLS and PWE3 Working Groups. > > Regards > > Loa Andersson > Stewart Bryant > Danny McPherson > George Swallow > > IETF MPLS and PWE3 Working Group Co-Chairs > > > > > >