Comment 13 for bug 997978

Ok, looking back over the original description, the bug poster has an eth0 mac address of d4:ae:52:84:2d:5a. I'm quite certain that is at least a part of the problem - the bridge will always take the lowest mac address of any device on it, and the nics on the VMs have lower mac addresses. So any time a VM goes on or offline, the bridge mac address will change, causing network traffic to pause.

Georg, please show 'ifconfig -a' output while the VMs are running