Dariush Pietrzak wrote:
>>BTW... does your host system uses DHCP or static IP assigned?
> 
>  aaah, now that you mention it, this is the only dhcp-configured machine
> with openvz I've got around... and today I disabled DHCP server and few
> hours later noticed the problem with openvz. 
>  This might be it, and it would explaing non-immediate connection with
> networking problems. Thanks.

Yep. DHCP client tries to be too smart :/
I've added this KB:
http://wiki.openvz.org/Networking:_disappering_routes_in_HN

Thanks,
Kirill