[vserver] Different MAC-Adress in a vserver

Hi,

today I ran into a programm that seperates clients by mac-address. Now
it happens all the clients are vservers and as such have interfaces
like eth0:5. while it is no big deal to change the MAC of a single
network interface this doesn't work for a virtual interface, it
changes all interfaces on the physical interface instead.
I know vserver does noch actually virtualize network interfaces, but I
found /etc/vserver/<NAME>/interfaces/<ID>/{tap,tun} which makes me
reconsider this. However, I have no idea to make real use of this, my
attempts to use brctl to do a virtual bridge with eth0 and the
tap-Interfaces failed so far. The host seemed to always announce the
mac of eth0, despite the vserver had a tap1 with a different mac.
All interfaces are on the same network.

How do I get this right?

Best Regards,
            _are_

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