[Cake] Enforcing video quality question

[Peter Lepeska]

Hi John,

Thanks for sharing!

Peter

On Tue, Feb 23, 2021 at 6:15 AM John Sager <john at sager.me.uk> wrote:

> Here is the toy QoS solution for linux, which is a simplified version of
> the
> one I uses successfully on my home network. It uses quite a few scheduler
> modules - sch_htb, act_connmark, em_meta etc - that may not load
> automatically, so they may need to be listed in /etc/modules.
>
> Toke, thanks for agreeing to let the attachment through.
>
> John
>
> On 19/02/2021 19:04, John Sager 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 at sager.me.uk
> >> <mailto: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 <mailto: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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