Configuration that uses the same specification for both the network and the interface - more constrictive
Figure: Only network selection with the same source binding address also uses the same specification for both target and source binding, however this example is more restrictive. With the Only property specified, this configuration does not allow multiple backup networks to be specified.
A host with the Only directive configured considers only those target addresses in the 192.168.100.0 subnet. Additionally, source binding to the local interface must be done on the 192.168.100.0 subnet.
On hosts that have a 192.168.100.0 interface but no :1b0 interface, source binding to the :1f0 interface is the default of the operating system.