Hi, Thanks for your help. I have another question. After copying existing configuration file, If I just change the name, UUID, and MAC, it works. However If I change the vcpu in configuration file to a different number, for example, from 1 to 2, the new created domain will have some problems. When I was trying to migrate this domain from one physical host to another one, the migration never ends !! Does this mean that creating new guests by copying existing configuration file is only suitable to configure same-resource-allocation guests? If vcpu of existing domain is 1, then the new domain has also to be 1?? Thanks for your time. Best Wishes Angel -- Fedora-xen mailing list Fedora-xen@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/fedora-xen