Migration Restrictions for Setting linkprop=phys-state

You can migrate a virtual network device that has a physical NIC backing device and has linkprop=phys-state to a target domain that does not have a physical NIC as a backing device (net-dev=). Because the linkprop=phys-state constraint is not a hard requirement, if such a domain is migrated to a machine that does not have an available net-dev value, the constraint is preserved but not fulfilled. The linkprop property is still preserved as phys-state and the network device link state shows as link up.