2016-04-20 0:26 GMT+03:00 Laine Stump <laine@laine.org>:
Well, as long as they're completely isolated from each other, you may have a better chance of success. However there will still be the issue of the IP address of the network interface. You can't have two networks using the same IP range (since libvirt doesn't use network namespaces for its networks), so the guest will need to change its IP, which means it will need to be notified of this need, possibly by having the host toggle the interface offline and back on - you can use virsh domif-setlink to do this.
If you don't need access from external net - you can use SLIRP for network, in this case you does not have problems with identical mac address... -- Vasiliy Tolstov, e-mail: v.tolstov@selfip.ru