Hi David, On March 18, 2015 5:34:30 AM GMT+01:00, "David P. Reed" <dpr...@reed.com> wrote: >It is not the cable modem itself that is bufferbloated. It is the head >end working with the cable modem. Docsis 3 has mechanisms to avoid >queue buildup but they are turned on by the head end.
I seem to recall that even on egress charter cable showed multiples hundred of bufferbloat, so I would argue that even at docs is 3.0 the modems might be over buffered or under-AQM'd. The head end certainly is another problem... > >I don't know for sure but I believe that the modem itself cannot >measure or control the queueing in the system to minimize latency. I believe this is supposed to happen with docs is 3.1 where PIE is mandatory in the modems. Now whether the ISPs will activate it or not I do not know. Best Regards sebastian > >You can use codel or whatever if you bound you traffic upward and >stifle traffic downward. But that doesn't deal with the queueing in the >link away from your home. > >On Mar 17, 2015, valdis.kletni...@vt.edu wrote: >>On Mon, 16 Mar 2015 13:35:32 -0700, Matt Taggart said: >>> Hi cerowrt-devel, >>> >>> My cable internet provider (Comcast) has been pestering me (monthly >>email >>> and robocalls) to upgrade my cable modem to something newer. But I >>_like_ >>> my current one (no wifi, battery backup) and it's been very stable >>and can >>> handle the data rates I am paying for. But they are starting to roll >>out >>> faster service plans and I guess it would be good to have that >option >>(and >>> eventually they will probably boost the speed of the plan I'm paying >>for). >>> So... >>> >>> Any recommendations for cable modems that are known to be solid and >>less >>> bufferbloated? >> >>I've been using the Motorola Surfboard SB6141 on Comcast with good >>results. >>Anybody got a good suggestion on how to test a cablemodem for >>bufferbloat, >>or what you can do about it anyhow (given that firmware is usually >>pushed >>from the ISP side)? >> >> >>------------------------------------------------------------------------ >> >>_______________________________________________ >>Cerowrt-devel mailing list >>Cerowrt-devel@lists.bufferbloat.net >>https://lists.bufferbloat.net/listinfo/cerowrt-devel > >-- Sent with K-@ Mail - the evolution of emailing. > >------------------------------------------------------------------------ > >_______________________________________________ >Cerowrt-devel mailing list >Cerowrt-devel@lists.bufferbloat.net >https://lists.bufferbloat.net/listinfo/cerowrt-devel -- Sent from my Android device with K-9 Mail. Please excuse my brevity. _______________________________________________ Cerowrt-devel mailing list Cerowrt-devel@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/cerowrt-devel