When you create an SR-IOV Ethernet virtual function or assign it to a guest domain, you must ensure that the virtual function has a user-assigned virtual function name by specifying it as the name property value.
In addition, the domain to be migrated must be configured with a multipath route for the SR-IOV Ethernet virtual function and a virtual network device. Both of these virtual interfaces must be able to access the same network.
source:primary# ldm create-vf name=user-assigned-name pf-name
source:primary# ldm set-io name=user-assigned-name vf-name
source:primary# ldm add-io vf-name guest-domain
The SR-IOV Ethernet virtual function is the active interface and the virtual network device is the standby interface.