Bridge & tc

I have to put a bridge for traffic shaping and traffic accounting.
There's a way to make tc works on the bridge? is there a tool like
CBQinit that works on bridges?

Thanks
Mike

mike wrote:
> I have to put a bridge for traffic shaping and traffic accounting.
> There's a way to make tc works on the bridge? is there a tool like
> CBQinit that works on bridges?
>
> Thanks
> Mike

http://bridge.sourceforge.net/
http://ebtables.sourceforge.net/

2.4 kernels -- need patch
2.6 kernels -- includes ebtables and bridge-nf
..
have fun ;-)
prg
email above disabled

prg wrote:
> http://bridge.sourceforge.net/
> http://ebtables.sourceforge.net/
>
err.. i know ebtables and bridging stuff, i need to know if iproute2
"TC" works on a bridged connection.
And for mental sanity i was looking for a tool like CBQ.init but for
bridges

Mike

mike wrote:
> prg wrote:
> > http://bridge.sourceforge.net/
> > http://ebtables.sourceforge.net/
> >
> err.. i know ebtables and bridging stuff, i need to know if iproute2
> "TC" works on a bridged connection.

It should, but may not depending on how kernel was compiled and whether
there are changes in netfilter code that effects this area. IIRC, some
of the 2.6 changes do effect how iptables rules should be written.

> And for mental sanity i was looking for a tool like CBQ.init but for
> bridges

Can't imagine that it would not, taking into account/making changes
with regard to above. It's just a script.

Try it and see -- no one can assure success ;-)

Personally, I don't like running the Linux stack as a bridge -- just
can't get over the willies of having the nics in promisc mode. Just a
personal foible and not recommended as advice.

Then I have the good fortune of having a few extra Ciscos around at
work to cope in the short run and $ to provide a long term solution.

I think you should be able to get what you need. Easy as flipping a
light switch? Doubt it.
..
good luck,
prg
email above disbled

prg wrote:
> Personally, I don't like running the Linux stack as a bridge -- just
> can't get over the willies of having the nics in promisc mode. Just a
> personal foible and not recommended as advice.

Why you say that? i've seen many linux bridges running without troubles
for years.

> Then I have the good fortune of having a few extra Ciscos around at
> work to cope in the short run and $ to provide a long term solution.

Heh, i don't have money to afford a Cisco just for my interests.

> I think you should be able to get what you need. Easy as flipping a
> light switch? Doubt it.

Naww, i don't want a plug'n'play thing that does all for me.
I want only examples to make my own script, but before that i wanted to
be sure that tc worked ok on a bridge.

Mike

mike wrote:
> prg wrote:
> > Personally, I don't like running the Linux stack as a bridge --
just
> > can't get over the willies of having the nics in promisc mode.
Just a
> > personal foible and not recommended as advice.
>
> Why you say that? i've seen many linux bridges running without
troubles
> for years.

As I said, just my personal feeling, not advice to anyone else. A nic
running full time in promiscuous mode is just too juicy a target for
someone sniffing packets.

> > Then I have the good fortune of having a few extra Ciscos around at
> > work to cope in the short run and $ to provide a long term
solution.
>
> Heh, i don't have money to afford a Cisco just for my interests.

My attitude is "easy" to live with since someone else is paying for the
switches;-)

> > I think you should be able to get what you need. Easy as flipping
a
> > light switch? Doubt it.
>
> Naww, i don't want a plug'n'play thing that does all for me.
> I want only examples to make my own script, but before that i wanted
to
> be sure that tc worked ok on a bridge.

It's been some time -- 2.4.14 kernel? -- since I played with the
bridging code, but it worked OK then. So far as I know, it still
works, but scripts and iptables rules may have to be brought up to date
for 2.6+ kernels. Should not be anything difficult or non-obvious.

IIRC, some of the "shaping" queues (IM?) never worked with bridge + tc
and one or two other approaches need a slight modification, I think.
The script should get you far down the road to success -- maybe a tweak
or two.

have fun
prg
email above disabled