Only the primary IP address of an interface can be borrowed.
Configuring IP address unnumbered saves IP address resources. You can configure an interface that is occasionally used to borrow an IP address, instead of configuring a new IP address for the interface.
The system view is displayed.
The view of the numbered interface is displayed.
A primary IP address is configured for the numbered interface.
The IP address of a numbered interface can be configured using the ip address command or obtained through negotiation.
The configuration is committed.