[Cake] Enforcing video quality question

Peter Lepeska bizzbyster at gmail.com
Fri Feb 19 10:02:16 EST 2021

Hi John

Does this result in the ability to set per internal host max ingress
bandwidth? If so, any chance you can share a snippet of a script? I will be
trying to reproduce your setup.

Thank you!


On Fri, Feb 19, 2021 at 7:16 AM John Sager <john at sager.me.uk> wrote:

> That's basically what I do. I set marks on outgoing traffic in the mangle
> table which are copied to connmark before egress. Then on ingress the
> connmark is restored to the packet and punted to ifb0 using 'action
> connmark
> action mirred egress redirect dev $IFB' as an ingress filter on the
> incoming
> interface (ppp0 in my case). Then I have HTB classes on ifb0 which set
> rate
> limits for different traffic classes indicated by the marks. I have only 6
> traffic classes (I bundle all video into one class), but as marks are 32
> bits wide there is lots of scope for classes for individual IP addresses.
> John
> On 18/02/2021 19:28, Toke Høiland-Jørgensen via Cake wrote:
> > Peter Lepeska <bizzbyster at gmail.com> writes:
> >
> >> A user on the OpenWrt forum suggested hashlimit rules supported by
> >> iptables. How does that idea sound to you?
> >
> > That will result in a cliff-edge policer (i.e., as soon as a device goes
> > over its limits it will see every packet get dropped). This doesn't
> > interact too well with the burstiness of TCP, so you'll likely get
> > erratic behaviour of the traffic if you do that. Doing the same thing
> > with HTB means the router will queue+shape each class (and with FQ-CoDel
> > on the leaves, you'll get a nice AQM behaviour as well), so that will be
> > smoother and less prone to bloat :)
> >
> > -Toke
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> >
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