What setup is required for QEMU/KVM migration?
For all QEMU/KVM migrations, libvirtd must be running on the source and destination host. You must be able to open a valid connection to the remote libvirt host. For tunneled migration, no extra configuration should be required, you simply need to pass the –tunnelled flag to virsh migrate. For plain unencrypted migration, the TCP port range 49152-49215 must be opened in the firewall on the destination host.