On 06/03/2015 07:22 AM, seitan wrote: The simplest method of doing what you need: Instead of using "<interface type='bridge'>", 1) create an "unmanaged virtual network" with the same name on both hosts On source host: <network> <name>bridge-net</name> <forward mode='bridge'/> <bridge name='br0'/> </network> On destination host: <network> <name>bridge-net</name> <forward mode='bridge'/> <bridge name='br500'/> </network> (put the above into files, then use "virsh net-define $file && virsh net-autostart bridge-net && virsh net-start bridge-net" to activate the new networks) 2) Change the interface definition in your guests to: <interface type='network'> <source network='bridge-net'/> .... [whatever else was already there] </interface> The guest XML now doesn't need to change during migration, so you can avoid the need to modify it with a migration hook (as suggested in the other response to your question)