Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-rfc4566bis-32
Paul Kyzivat <pkyzivat@alum.mit.edu> Thu, 14 March 2019 16:56 UTC
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From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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Date: Thu, 14 Mar 2019 12:56:19 -0400
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Archived-At: <https://mailarchive.ietf.org/arch/msg/mmusic/Ybybmnulc1Ct_lBnMlyFGlHPIKU>
Subject: Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-rfc4566bis-32
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On 3/14/19 12:26 PM, Colin Perkins wrote: >> On 14 Mar 2019, at 16:23, Paul Kyzivat <pkyzivat@alum.mit.edu >> <mailto:pkyzivat@alum.mit.edu>> wrote: >> On 3/14/19 11:02 AM, Colin Perkins wrote: >>>> On 12 Mar 2019, at 15:41, Paul Kyzivat <pkyzivat@alum.mit.edu >>>> <mailto:pkyzivat@alum.mit.edu>> wrote: >>>> On 3/12/19 7:08 AM, Colin Perkins wrote: >>>>>>>>>> This is a normative requirement of RTP, however. If we want to >>>>>>>>>> avoid normative examples, which I’d agree makes sense, then >>>>>>>>>> this needs to be rewritten as just “An RTP-based system in >>>>>>>>>> recvonly mode SHOULD…”.. >>>>>>>>> >>>>>>>>> That is the way it was. The change from "SHOULD" to "should" >>>>>>>>> was to make it non-normative. >>>>>>>>> >>>>>>>>> Or were you requesting to remove “e.g."? >>>>>>>> Remove the “e.g.”, yes, but also change “should” back to “SHOULD”. >>>>>>> >>>>>>> I thought the point was that the RTP specs are normative and this >>>>>>> is only an example, and so shouldn't be normative. >>>>>> >>>>>> I do not have the text in front of me, but I agree that examples >>>>>> should not be stated normatively. >>>>> This is documenting a perhaps unexpected interaction between SDP >>>>> and RTP. That is, when set to recvonly in SDP, an RTP endpoint >>>>> SHOULD send RTCP. I do think that it’s important that we spell this >>>>> out clearly here, with normative language. >>>> >>>> I'm neutral here whether its normative or not. If it is to be a >>>> normative SHOULD, can we please include some "unless" text >>>> indicating the conditions when it may be omitted? Better yet, turn >>>> it into an "if NOT x then MUST ..." form. >>> I don’t think I can summarise the rules around when RTCP is, or is >>> not, to be sent as a simple condition. If more detail is needed, I >>> suggest “An RTP-based system in recvonly mode SHOULD still send RTCP >>> packets as described in [RFC3550] Section 6”. >> >> I'll put this in if it is the consensus. But this appears to give >> license to someone to ignore RFC3550. (I have talked to people who >> have said "SHOULD isnt a firm requirement so I don't need to do it.) >> >> If that SHOULD is changed to MUST, then it will still mean that RTCP >> can be avoided in whatever cases RFC3550 allows. Specifically: >> >> "An RTP-based system in recvonly mode MUST still send RTCP packets as >> described in [RFC3550] Section 6.” > > I’m happy for you to change this to a MUST in that manner. OK. I'll do it that way. Thanks, Paul
- [MMUSIC] AD Evaluation of draft-ietf-mmusic-rfc45… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Colin Perkins
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Christer Holmberg
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Christer Holmberg
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Roni Even (A)
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Christer Holmberg
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ali C. Begen
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Roni Even (A)
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Colin Perkins
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Colin Perkins
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Colin Perkins
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Colin Perkins
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Colin Perkins
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] AD Evaluation of draft-ietf-mmusic-r… Ben Campbell