Configuration prerequisites
Before you configure the ARP PnP feature on an interface, perform the following tasks:
Assign the interface a primary IP address. ARP PnP generates agent IP addresses based on the primary IP address and mask length of the interface.
Use the reset arp command to delete all ARP entries on the interface.
Configure NAT on the interface that connects to the external network. For more information about NAT, see "Configuring NAT."