Re: [Dart] draft-dart-dscp-rtp - way forward
"Black, David" <david.black@emc.com> Fri, 29 August 2014 15:15 UTC
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From: "Black, David" <david.black@emc.com>
To: Harald Alvestrand <harald@alvestrand.no>, Ben Campbell <ben@nostrum.com>
Date: Fri, 29 Aug 2014 11:14:38 -0400
Thread-Topic: [Dart] draft-dart-dscp-rtp - way forward
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Subject: Re: [Dart] draft-dart-dscp-rtp - way forward
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Harald, I'm about to submit a -05 with the indication that the single DSCP recommendation for SCTP and DCCP may be revised. The RTCP multi-stream optimization text will still be in there with Colin's clarification about "received" streams. I'm about to vanish for about 3 weeks, but could put in a revised -06 over the weekend if you can quickly convince Colin. Thanks, --David > -----Original Message----- > From: Harald Alvestrand [mailto:harald@alvestrand.no] > Sent: Friday, August 29, 2014 6:49 AM > To: Ben Campbell; Black, David > Cc: dart@ietf.org > Subject: Re: [Dart] draft-dart-dscp-rtp - way forward > > I think the text in -04 looks reasonable. > > I would like to do two things: > > - The justification for "single DSCP" in SCTP and DCCP is "we don't know > what will happen". > A logical consequence is that this recommendation might change as the > result of further study, so we might want to add near the bottom of > section 5 a sentence saying "This recommendation may be revisited if > experiments and analysis shows compelling reasons to change it." > > - I still think the ban against RTCP multi-stream reporting optimization > is completely wrong. The reports will correctly reflect the differing > packet loss behaviours of the incoming RTP streams, and that's all they > should be required to do. > > I regard the latter as somewhat important. The former is more a matter > of taste (if we're arguing based on ignorance, allow for the case where > ignorance becomes knowledge). > > > On 08/28/2014 10:25 PM, Ben Campbell wrote: > > Okay, works for me. > > > > Thanks! > > > > Ben. > > > > On Aug 28, 2014, at 3:15 PM, Black, David <david.black@emc.com> wrote: > > > >>> If we think we can close this as not a real issue (or at least not an > issue we > >>> plan to address), but there's some risk it might come back up at IETF LC, > then > >>> that's fine. But if we are saying there is an open issue that needs > closure, > >>> but we can close it during IETF last call, then I have reservations. The > >>> version that goes to IETF LC should be one that the working group believes > to > >>> be as complete is it's going to get. > >> In private discussion, both Harald and I favored saying less (rather than > more) > >> about RMCAT in this DART draft. For that reason I think "at least not > >> an issue we plan to address" is a valid characterization of this item. > >> > >> Thanks, > >> --David > >> > >>> -----Original Message----- > >>> From: Ben Campbell [mailto:ben@nostrum.com] > >>> Sent: Thursday, August 28, 2014 3:44 PM > >>> To: Black, David; Harald Tveit Alvestrand > >>> Cc: dart@ietf.org > >>> Subject: Re: [Dart] draft-dart-dscp-rtp - way forward > >>> > >>> (as chair) > >>> > >>> On Aug 28, 2014, at 1:12 PM, Black, David <david.black@emc.com> wrote: > >>> > >>>> [E] Open issue: Harald Alvestrand's concerns about "differential > treatment" > >>>> wrt Section 5.1 . I don't completely understand these concerns, and > suspect > >>>> that they may require an email discussion across the DART and RMCAT WGs > >>>> to sort through. > >>>> > >>>> --> Deferred - Harald wanted to think about this, and I've seen nothing > >>>> --> further. I'd suggest that IETF Last Call as an appropriate > opportunity > >>>> --> to share any further thoughts, so I don't think there's anything to > be > >>> done > >>>> --> about this now. > >>> I have mixed feelings on this. > >>> > >>> If we think we can close this as not a real issue (or at least not an > issue we > >>> plan to address), but there's some risk it might come back up at IETF LC, > then > >>> that's fine. But if we are saying there is an open issue that needs > closure, > >>> but we can close it during IETF last call, then I have reservations. The > >>> version that goes to IETF LC should be one that the working group believes > to > >>> be as complete is it's going to get. > >>> > >>> David, thoughts? > >>> > >>> Harald, do you care to comment further?
- [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Colin Perkins
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Colin Perkins
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Harald Alvestrand
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Harald Alvestrand
- Re: [Dart] draft-dart-dscp-rtp - way forward Colin Perkins
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Harald Alvestrand
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Harald Alvestrand
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Colin Perkins
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell
- Re: [Dart] draft-dart-dscp-rtp - way forward Colin Perkins
- Re: [Dart] draft-dart-dscp-rtp - way forward Harald Alvestrand
- Re: [Dart] draft-dart-dscp-rtp - way forward Black, David
- Re: [Dart] draft-dart-dscp-rtp - way forward Ben Campbell