no ip address

This command deletes an IP address from an interface. The value for ipaddr is the IP address of the interface in a.b.c.d format where the range for a, b, c, and d is 1-255. The value for subnetmask is a 4-digit dotted-decimal number which represents the Subnet Mask of the interface. To remove all of the IP addresses (primary and secondary) configured on the interface, enter the command no ip address.