##kvm-host1(1921.68.0.11)
kvm-host1 # virsh list
kvm-host1 # virsh migrate --live centos qemu+ssh://192.168.0.12/system
root@192.168.0.12's password:    <- root password
kvm-host1 # virsh list


##kvm-host2(1921.68.0.12)
kvm-host2 # virsh list
kvm-host2 # virsh migrate --live centos qemu+ssh://192.168.0.11/system
root@192.168.0.11's password:    <- root password
kvm-host2 # virsh list