This behaviour contradicts with description found in docs (in which
> <source> tag specify interface in host, not in container). I think,
> the previous bridge must be specified as
> <interface type='bridge'>
> <mac address='00:16:3e:34:21:9e'/>
> - <source bridge='eth10'/>
> + <target dev='eth10'/>
> </interface>
>
You are right. It is bug.
Well, here is the patch, that fixes that behaviour.
P.S. Are someone going to implement
<interface type='bridge'>
...
<source bridge="...">
...
</interface>
part of openvz driver? :)