Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-channel-sdpneg
Paul Kyzivat <pkyzivat@alum.mit.edu> Thu, 11 February 2016 21:00 UTC
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To: Flemming Andreasen <fandreas@cisco.com>, mmusic@ietf.org, "DRAGE, Keith (Keith)" <keith.drage@alcatel-lucent.com>, "bradler >> Juergen Stoetzer-Bradler" <Juergen.Stoetzer-Bradler@alcatel-lucent.com>
References: <BBE9739C2C302046BD34B42713A1E2A22E88D533@ESESSMB105.ericsson.se> <565C6CE3.3050007@alum.mit.edu> <565CDF90.7050107@nteczone.com> <565CEA14.2040607@alum.mit.edu> <565CEF7B.7010305@nteczone.com> <949EF20990823C4C85C18D59AA11AD8BADE16A00@FR712WXCHMBA11.zeu.alcatel-lucent.com> <56682B96.9020008@alcatel-lucent.com> <56684C13.9030106@alum.mit.edu> <5668F9C1.4040606@nteczone.com> <566903E3.8020108@alum.mit.edu> <566A16D2.1070108@nteczone.com> <949EF20990823C4C85C18D59AA11AD8BADE22AB4@FR712WXCHMBA11.zeu.alcatel-lucent.com> <566AEB05.3040501@alum.mit.edu> <56AACC37.8090900@cisco.com> <56AB8596.9090304@alum.mit.edu> <56B12F48.409@cisco.com> <56B25159.70002@alum.mit.edu> <56B28240.7080206@cisco.com> <56B2DA8D.2000909@alum.mit.edu> <56B41A47.10901@nteczone.com> <56B63EF8.8080100@alum.mit.edu> <56B8BDA4.7060305@cisco.com> <56B8CBB5.7070507@alum.mit.edu> <56BCF47E.2000603@cisco.com>
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Date: Thu, 11 Feb 2016 16:00:19 -0500
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Cc: draft-ietf-mmusic-data-channel-sdpneg@ietf.org
Subject: Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-channel-sdpneg
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On 2/11/16 3:52 PM, Flemming Andreasen wrote: > > > On 2/8/16 12:09 PM, Paul Kyzivat wrote: >> On 2/8/16 11:09 AM, Flemming Andreasen wrote: >>> >>> >>> On 2/6/16 1:44 PM, Paul Kyzivat wrote: >>>> On 2/4/16 10:43 PM, Christian Groves wrote: >>>>> Isn't this the approach we're taking today? >>>>> draft-ietf-mmusic-data-channel-sdpneg has general text and specific >>>>> drafts are used to describe protocols that use the mechanism (i.e. >>>>> draft-ietf-mmusic-msrp-usage-data-channel & >>>>> draft-ietf-clue-datachannel). >>>> >>>> It remains to be seen if that will be enough. E.g., there currently >>>> aren't any iana considerations in >>>> draft-ietf-mmusic-msrp-usage-data-channel. >>>> >>>> Suppose I encounter some sdp that uses msrp over a data channel, but >>>> that usage is unknown to me. How do I find the spec (the reference to >>>> draft-ietf-mmusic-msrp-usage-data-channel) that defines that usage? >>>> >>>> I would like to think that the iana registries will allow me to trace >>>> back to the relevant specs. >>>> >>> No disagreement on that part, however having taken another look at both >>> sdpneg and the msrp-usage documents, I still don't agree with your >>> original request for all (existing and new) attributes to specify how >>> they may or may not be used with the dcsa attribute defined by sdpneg. >>> >>> As Christian noted, the sub-protocol specifics are defined in individual >>> documents (like msrp-usage), which calls your the parameters that are at >>> least needed to be supported for that usage. Taking MSRP as an example, >>> why isn't that enough, and how do you see the resulting set of >>> attributes that may or may not be used with MSRP differ between use in a >>> data-channel (and hence encapsulated in dcsa) or as a regular media >>> stream ? >> >> Based on this discussion, I conclude that it should be sufficient for >> this draft to say that before an attribute can be used with dcsa, such >> usage must be defined somewhere. This could be either: >> - as part of the definition of the attribute, OR >> - as part of the definition of the protocol referenced on the m-line. >> > We are getting closer, but it's still not obvious to me that you cannot > use an attribute with dcsa if it has not been explicitly defined for the > attribute in question. Can you give me an example? Thanks, Paul > Clearly, there are attributes that wouldn't make > sense over data channels, just like there are attributes that don't make > sense over particular media descriptions. > > Again, I'd like to hear from more people on this, including the authors. > > Thanks > > -- Flemming > > > >> Thanks, >> Paul >> >>> Also, it would be good to hear from more people on this, including the >>> document authors. >>> >>> Thanks >>> >>> -- Flemming >>> >>> >>>> Thanks, >>>> Paul >>>> >>>>> Regards, Christian >>>>> >>>>> On 4/02/2016 3:58 PM, Paul Kyzivat wrote: >>>>>> On 2/3/16 5:42 PM, Flemming Andreasen wrote: >>>>>> >>>>>>> I'm not concerned about the IANA part. I agree that *if* we need to >>>>>>> expliclty specify attribute interactions for "dcsa", then it >>>>>>> should be >>>>>>> part of the IANA registry. What I am not agreeing with at this >>>>>>> point is >>>>>>> that there is indeed a need to explicitly speficy these >>>>>>> interactions as >>>>>>> opposed to relying on a more general algorithmic approach (plus the >>>>>>> offerer being responsible for generating a valid offer if he >>>>>>> wants to >>>>>>> establish a data channel). >>>>>> >>>>>> Well, an obvious one is that the protocol(s) the attribute >>>>>> pertains to >>>>>> need to be defined to work over data channels. >>>>>> >>>>>> Thanks, >>>>>> Paul >>>>>> >>>>>> _______________________________________________ >>>>>> mmusic mailing list >>>>>> mmusic@ietf.org >>>>>> https://www.ietf.org/mailman/listinfo/mmusic >>>>>> >>>>> >>>>> _______________________________________________ >>>>> mmusic mailing list >>>>> mmusic@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/mmusic >>>>> >>>> >>>> _______________________________________________ >>>> mmusic mailing list >>>> mmusic@ietf.org >>>> https://www.ietf.org/mailman/listinfo/mmusic >>>> . >>>> >>> >>> >> >> _______________________________________________ >> mmusic mailing list >> mmusic@ietf.org >> https://www.ietf.org/mailman/listinfo/mmusic >> . >> > >
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- [MMUSIC] WGLC for draft-ietf-mmusic-data-channel-… Bo Burman
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… DRAGE, Keith (Keith)
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… DRAGE, Keith (Keith)
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Schwarz, Albrecht (Nokia - DE)
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Christian Groves
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Flemming Andreasen
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Juergen Stoetzer-Bradler
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat
- Re: [MMUSIC] WGLC for draft-ietf-mmusic-data-chan… Paul Kyzivat