libvirt users - May 2014 - problem with bond/team network interfaces

Hello,

I have VM attached to bridge br0. VM can see the network (ping works) when
the bridge has ethernet interfaces. But when I create bond or team device
and attach it to a bridge instead of eth interface, VM does not ping
anymore. Any ideas why?

Thanks,
Nerijus

Hi Nerijus,
the chances are that your ethernet packets are “looping" through physical
switches and that they are overwriting the forwarding table of your software
bridge.
Try to dump the forwarding table (watch -n1 brctl showmacs <brname>). If
you see your VM mac address changes port over time, you are hitting that issue.

In that case, the following could help to fix that issue.

 http://stackoverflow.com/questions/11206910/bond-on-software-bridge-connection-issue/12778535#12778535

Cheers,
Davide

On 28 May 2014, at 01:20, Nerijus Baliunas <nerijus@users.sourceforge.net>
wrote:
> Hello,
> 
> I have VM attached to bridge br0. VM can see the network (ping works) when
> the bridge has ethernet interfaces. But when I create bond or team device
> and attach it to a bridge instead of eth interface, VM does not ping
> anymore. Any ideas why?
> 
> Thanks,
> Nerijus
> 
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