Configuring ARP automatic scanning and fixed ARP

ARP automatic scanning is usually used together with the fixed ARP feature.

With ARP automatic scanning enabled on an interface, the device automatically scans neighbors on the interface, sends ARP requests to the neighbors, obtains their MAC addresses, and creates dynamic ARP entries.

Fixed ARP allows the device to change the existing dynamic ARP entries (including those generated through ARP automatic scanning) into static ARP entries. The fixed ARP feature effectively prevents ARP entries from being modified by attackers.

	NOTE: Use both ARP automatic scanning and fixed ARP in small-scale networks such as a cybercafe.