Description of problem:

Vista/W2k8/W7 detect the network they are in by the MAC address of the default gateway. virbr0 gets a random MAC address upon the start of the first VM. This causes these Windows OSs to detect a new network upon each boot, which is annoying and causes connectivity problems upon boot.

Version-Release number of selected component (if applicable):

0.7.0-1ubuntu13.1

How reproducible:

Every time.

Steps to Reproduce:
1. start a VM
2. enter "ifconfig virbr0" and look at the MAC address
3. stop all VMs
4. start a VM
  
Actual results:

MAC 00:00:00:00:00:00 when all VMs are closed; random MAC once the first VM is started.

Expected results:

I'd like to set a fixed MAC address for virbr0.

Additional info:

I don't know if it is a libvir problem. But I did not find an if-up script where I could set a fixed MAC address. As this is a severe problem with Vista and up, this should be handled at a higher level than the host OS.