"ietf@xxxxxxxx" mailing list, We would like to make some comments on 'Requirements for OAM in MPLS Transport Networks ' <draft-ietf-mpls-tp-oam-requirements-03.txt> as a Proposed Standard. Firstly, we would like to add one significant requirement which is missing in the current draft. The proposed additional requirement in section 2.2.2 "Scope of OAM" is as follows. "It MUST be possible to operate the MPLS-TP OAM protocols, which satisfy functional requirements that are common to general transport layer network (i.e., independent of technology), in a way that is similar to other transport layer technologies which has been standardized and will be standardized in ITU-T (e.g., SDH, OTN and Ethernet)." There are two main backgrounds on this requirement from the perspective of carrier's operation. At first, everyone will agree that the concept of transport profile of MPLS-TP comes from transport layer technology like SONET/SDH , OTN and Ethernet which were standardized in ITU-T. Therefore we would like to keep those benefits of those well established technologies as much as possible also in MPLS-TP OAM. Second, most carriers are already familiar with existing transport plane operational system. It would be very helpful to keep the characteristic. However, we also think it is also considerable to improve existing transport network OAM, if they can be developed or advanced more from the perspective of transport profile. We never mean to stop further progress if the existing transport network OAM can be further developed to more sophisticated one from the perspective of transport profile. Secondly, we attached "Proposal 1" as additional requirements on the MPLS-TP OAM draft. We proposed several OAM requirements which are not clarified in the MPLS-TP OAM requirement draft. We consider that those items we proposed to make clear would be very beneficial in terms of operational enhancement in packet transport network and useful tool to operators using MPLS-TP technology in their commercial network. Thirdly, we also attached "Proposal 2" as additional comments on the MPLS-TP OAM draft. There are some ambiguities in existing MPLS-TP OAM drafts. We believe this contribution will remove the ambiguities and make existing MPLS-TP more productive. We believe these comments are valuable for further discussion on MPLS-TP OAM standardization, although there could not be so much time left. Moreover, we don't like to interfere with existing hard work by IETF and ITU-T. However, we believe, considering the possibility of running into major problems, having discussion about those issues and making decision among related experts now would move forward with MPLS-TP standardization in more productive manner as a result. Those documents are supposed to be discussed tomorrow in ITU-T SG15meeting. After the discussion, we are also going to propose them to MPLS-TP mailing list, including the feedback from ITU-T, if needed.
Finally, ITU-T and IETF have kept great collaborative works, thanks to the great efforts mainly by IETF MEAD management members and ITU-T Ad-hoc management members so far. We strongly hope IETF and ITU-T to keep working so that they can reach an productive agreement on this unprecedented collaborative works of MPLS-TP standard successfully, by continuing to respect and encourage each other. Best regards, Yoshinori Koike The IESG wrote:
The IESG has received a request from the Multiprotocol Label Switching WG (mpls) to consider the following document:- 'Requirements for OAM in MPLS Transport Networks ' <draft-ietf-mpls-tp-oam-requirements-03.txt> as a Proposed Standard The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to theietf@xxxxxxxx mailing lists by 2009-10-05. Exceptionally, comments may be sent to iesg@xxxxxxxx instead. In either case, please retain the beginning of the Subject line to allow automated sorting.The file can be obtained via http://www.ietf.org/internet-drafts/draft-ietf-mpls-tp-oam-requirements-03.txt IESG discussion can be tracked via https://datatracker.ietf.org/public/pidtracker.cgi?command=view_id&dTag=18036&rfc_flag=0 _______________________________________________ mpls mailing list mpls@xxxxxxxx https://www.ietf.org/mailman/listinfo/mpls
-- ************************************** Yoshinori Koike Optical Transmission Systems Development Project First Promotion Project NTT Network Service Systems Laboratories NIPPON TELEGRAPH AND TELEPHONE CORPORATION Telephone: +81 422 59 6723 Facsimile: +81 422 59 3494 Email: koike.yoshinori@xxxxxxxxxxxxx **************************************
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