Hi Vijay, Qin and all, Please see below for details.
On 22/03/16 01:52, Vijay K. Gurbani wrote: > Qin Wu writes: >> Hi, Vijay: >> Thank for raising discussion on this. > > Qin: Thanks for starting a discussion on this. I was wondering why no > one had picked up on the mail to start a thread. > >> Socializing multi-cost and alto-calendar is a good idea, I also think >> we should socialize ALTO cost metric draft since this draft is a >> companion document of alto-calendar draft and it interacts with many >> routing area WGs on how to use measurement data provided by routing >> system data source and RFC7471 and RFC7752 even provide a clear ALTO >> use case. > > Great. I would think that you'd want to be in a position by the > Berlin IETF to make a short presentation to RTG area to intimate the > WGs there on the draft. > >> We authors plan to revive alto te metric draft and keep on proceeding >> it in the upcoming IETF meeting. > > Good. > >> Regarding developing policy using ALTO or JSON, I am afraid this has >> potential overlapping with SUPA since YANG defined policy can be >> translated into either XML format or JSON format and YANG is used to >> generate API, it could be RESTful API or PlugRestful API. Do we think >> ALTO is another modeling language besides YANG? > > Is ALTO a modeling language? I don't think so. But I will be the first > to admit that my YANG knowledge is not up to par with that of others in > the working group, who I hope will hold a more insightful discussion on > this topic, and in the process educate me. I think ALTO is not a modelling language. However, we do use some kind of modelling in the ALTO RFCs/drafts. For example, the models related to IRD are provided in RFC 7285, section 9.2.2. Theoretically we should be able to use YANG to model the ALTO protocol. Unfortunately, YANG (or more precisely the current YANG-to-JSON & JSON-to-YANG interpreters) doesn't support the key-value syntax which is widely used in ALTO. One approach is that we use YANG to model the protocol but provide a customized interpreter. > > Clearly, the emergence of YANG has stymied the efforts of certain work > items in ALTO. It will be an excellent start for someone (Richard Y?) > to provide a summary on the relevant issues we need to discuss here > to move some of the work forward and indeed, to formulate a response > --- if one is needed --- on the use of YANG in ALTO. > > Cheers, > > - vijay Regards, Kai
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