[fedora-virt] Guest networking problem

[Adam Huffman]

Yesterday I setup a Windows XP guest on a new F12 machine.  Everything
proceeded normally.

This afternoon, the guest has lost network connectivity and has given
itself a 169.254. address as a result.

No DHCP requests are now being logged from the guest, whereas the
dnsmasq log showed them coming in all morning.

I would be grateful for any suggestions on how to investigate this.

Adam