Re: overly timid congestion control with amazon prime live video

[sronan () ronan-online com]

Do you have an explanation for the question he asked? I am sure it would be of interest to many here.

Shane

> On Dec 13, 2024, at 4:23 PM, L Sean Kennedy <liam () fedney org> wrote:
>
> I replied to Dan off list to investigate.
>
> Any Prime Video quality issues reported to an ISP by customers or CDN issues can be sent directly to 
> primevideo-isp-us () amazon com .
>
> Thanks,
> Sean
>
> > > > On Dec 13, 2024, at 3:52 PM, Daniel Sterling <sterling.daniel () gmail com> wrote:
> > >
> > > While streaming football last night from AT&T fiber (AS7018), I
> > > noticed the video quality went way down when I did a large download on
> > > another system. I have gigabit fiber but I'm using Linux tc to
> > > throttle my network traffic. I've configured cake with a 200mbit
> > > limit, and I also use a low BQL setting to further ensure low latency
> > > for low-bandwidth traffic.
> > >
> > > IOW, my Linux router will drop packets across the board rather
> > > liberally in the face of large downloads, but I've always seen streams
> > > fight back for their share of the bandwidth -- except for amazon's.
> > >
> > > The live stream appears to use UDP on a non-standard port (not 443).
> > > Does anyone know what amazon has done to cause their congestion
> > > control algorithms to yield so much bandwidth and not fight for their
> > > fair share?
> > >
> > > Thanks,
> > > Dan