Re: [B.A.T.M.A.N.] Texas UML instances and OLSR+BATMAN tests

[Axel Neumann <axel@open-mesh.net>]

Hello

On Dienstag 09 Oktober 2007, Benjamin Henrion wrote:
> On 10/2/07, Axel Neumann <axel@open-mesh.net> wrote:
> > Hello,
> >
> > We have used OpenVZ (linux-2.6.18-openvz-028.035.1) for emulating batman
> > and olsr.
> > Further background information about the setup is given here:
> > http://open-mesh.net/batman/doc/evaluation/setup-details

[snap]

> > The following worked:
> > - On  2GHz core duo notebook (qemu using only one processor and 800MB
> > Ram) - More than 100 virtual instances idling in parrallel
> >   - About 60 virtual instances running olsr or batman in parrallel
> >
> > - use brctl, ebtables, TC, and NETEM for configuring virtual networks
> > with - dedicated links
> >   - dedicated packetloss, delay for unicast and broadcast traffic
> >
[snap]

>
> I have tested the OpenVZ livecd with a small window manager (consumes
> 128MB in RAM), and with 10 instances running batman or olsr, it works
> fine with 512MB of RAM, but my problem is that the livecd does not
> supports ebtables it seems, which I need to configure for avoiding
> bridge shortcuts between the nodes.
>
> Does anybody has experience with ebtables? Does it needs a kernel
> patch? Or it is just user-space?

If you follow the link in the above lines, you will find a line like:

... patched again to fix a bug in the ebtables part of the 2.6.18 kernel 
extracted from patch-2.6.18.8 from 
http://www.kernel.org/pub/linux/kernel/v2.6/ and downloadable here...

Why not having a look ?

>
> OpenVZ looks very promising for network simulators, it consumes very
> few memory, especially if you use a mounted HD to store the
> filesystem.
>
> --
> Benjamin Henrion <bhenrion at ffii.org>
> FFII Brussels - +32-484-566109 - +32-2-4148403
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