Configuration guidelines

Follow these guidelines when you configure IP unnumbered on an interface:

• An interface cannot borrow an IP address from an unnumbered interface.

• Multiple interfaces can use the same unnumbered IP address.

• If an interface has multiple IP addresses, only the primary IP address can be borrowed.

• The IP address of the borrowing interface varies with that of the borrowed interface. If an IP address is configured for the borrowed interface, the IP address of the borrowing interface is the same as that of the borrowed interface. If no IP address is configured for the borrowed interface, no IP address is assigned for the borrowing interface.