Re: [Cake] Enforcing video quality question

[Peter Lepeska <bizzbyster@gmail.com>]

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"I'll put together a toy iptables rules file and a toy script with the
necessary tc commands. "

Wow -- that would be really appreciated. Question: will you need to
explicitly call out the inside IP address of the host being shaped? Or, can
it be set to shape each inside host?

I'm not sure you can post to mailing list but maybe give it a shot (since
there may be general interest) and if it fails email me directly?

Thanks!!!

Peter

On Fri, Feb 19, 2021 at 2:04 PM John Sager <john@sager.me.uk> wrote:

> Yes. The marks are set on egress so you can select on inside IP address,
> port, protocol - in fact many characteristics that iptables rules can test
> for. I'll put together a toy iptables rules file and a toy script with the
> necessary tc commands. It'll take me a few days though as I'm busy with
> other stuff currently.
>
> PS does the cake list allow attachments? It will be a small zip file.
>
> John
>
> On 19/02/2021 15:02, Peter Lepeska wrote:
> > 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!
> >
> > Peter
> >
> > On Fri, Feb 19, 2021 at 7:16 AM John Sager <john@sager.me.uk
> > <mailto:john@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@gmail.com <mailto:bizzbyster@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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> >      > https://lists.bufferbloat.net/listinfo/cake
> >      >
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>

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