You migrate and delete IPoIB VNICs just as you would with Ethernet VNICs. For more information, see Migrating VNICs and Deleting VNICs.
The following example shows how to migrate ipoib_vnic0 to the datalink net5.
# dladm modify-vnic -l net5 ipoib_vnic0
The following example shows how to delete ipoib_vnic0.
# dladm delete-vnic ipoib_vnic0