[ Thanks to Boris
Derzhavets for this link. ]
“Install Xen 4.0 and Libvirt like on F12 ( [1] ). Via
my experience xend will hang for 5-7 min at startup and xen managed
bridging will fail as well. This behavior stays the same under
either 2.6.31.13 or 2.6.32.13 pvops kernels. At the same time PV
guests might be unable to obtain IP via interface virbr0. Ubuntu
Lucid official xenified installer fails with DHCP request been sent
to virbr0 under either 2.6.31.13 or 2.6.32.13 kernels,unless you
will manually place Lucid guest on subnet 192.168.122.0 and point
to DNS Server of your’s ISP. In this case installer will continue
fetching data from Internet and been created Lucid PV DomU would be
routed to the Net via bridge virbr0 , having static IP
address.”