Re: [aqm] [rtcweb] Catching up on diffserv markings
Harald Alvestrand <harald@alvestrand.no> Wed, 21 October 2015 16:11 UTC
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To: Dave Taht <dave.taht@gmail.com>, "rtcweb@ietf.org" <rtcweb@ietf.org>, "rmcat@ietf.org" <rmcat@ietf.org>, "aqm@ietf.org" <aqm@ietf.org>, cake@lists.bufferbloat.net
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From: Harald Alvestrand <harald@alvestrand.no>
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Subject: Re: [aqm] [rtcweb] Catching up on diffserv markings
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Den 21. okt. 2015 17:51, skrev Dave Taht: > I unsubscribed from rmcat and rtcweb groups a while back after I got > overloaded, and appear.in started working so well, (for both ipv6 and > ipv4! I use it all day long now!), to focus on finishing up the new > "cake" qdisc/shaper/aqm/QoS system, among other things. > > http://www.bufferbloat.net/projects/codel/wiki/CakeTechnical > > Cake is now entering the testlab, and among other things, it has > support for the diffserv markings discussed in the related, now > concluded dart wg, but in ways somewhat different from that imagined > there. We have not got any good code in our testbeds yet to test > videoconferencing behavior, and we could use some, although it does > look like we can drive firefox with some remote control stuff with a > fixed video playback now.... > > Five questions: > > 1) Has anyone implemented or tested putting voice and video on two > different 5-tuples in any running code out there? All VC systems I know of except WebRTC-based ones do it, AFAIK. It's putting them on the same that's unusual. > 2) How about diffserv markings in general? Do any browsers or webrtc > capable software support what was discussed way back when? I know Hangouts did something like that internally, on the controlled network. But not according to spec. > 3) Were diffserv marking changes eventually allowed on the same 5-tuple? Yes, with caveats. draft-ietf-tsvwg-rtcweb-qos has the table. > 4) Did the ECN support that was originally in one draft or another > ever make it into any running code? I don't know. I think we lost it from the docs. > (yea, apple plans to turn on ecn universally in their next OS!) > > 5) What else did I miss in the past year I should know about? For TCP and SCTP congestion controllers, we're back to one DSCP marking per flow, and resetting the congestion control state if DSCP marking changes. > > Feel free to contact me off list if these have already been discussed. > I have totally lost track of the relevant drafts. They're not finished still :-) > > Sincerely, > > Dave Täht > I just lost five years of my life to making the edge > of the internet, and, wifi better. > And, now... the FCC wants to make my work illegal > for ordinary people to install. > https://www.gofundme.com/savewifi > > _______________________________________________ > rtcweb mailing list > rtcweb@ietf.org > https://www.ietf.org/mailman/listinfo/rtcweb >
- [aqm] Catching up on diffserv markings Dave Taht
- Re: [aqm] [rtcweb] Catching up on diffserv markin… Colin Perkins
- Re: [aqm] [rtcweb] Catching up on diffserv markin… Christian Huitema
- Re: [aqm] [Cake] [rmcat] [rtcweb] Catching up on … Jonathan Morton
- Re: [aqm] [rmcat] [rtcweb] Catching up on diffser… Piers O'Hanlon
- Re: [aqm] [rtcweb] Catching up on diffserv markin… Harald Alvestrand
- Re: [aqm] [rtcweb] Catching up on diffserv markin… Pal Martinsen (palmarti)
- Re: [aqm] [rmcat] [rtcweb] Catching up on diffser… Justin Uberti
- Re: [aqm] [Cake] [rmcat] [rtcweb] Catching up on … Loganaden Velvindron
- Re: [aqm] [Cake] [rmcat] [rtcweb] Catching up on … Sebastian Moeller
- Re: [aqm] [Cake] [rmcat] [rtcweb] Catching up on … Justin Uberti
- Re: [aqm] [Cake] [rmcat] [rtcweb] Catching up on … Sebastian Moeller