It is sometimes necessary to flush the ARP cache if the IP address has changed for a device on the network. Since the IP address is linked to a physical address, the IP address can change but still be associated with the physical address in the ARP Cache. Flushing the ARP Cache allows new information to be gathered and stored in the ARP Cache. Click Flush ARP Cache to clear the information.To flush an entry in the ARP Cache table, select the entry and click Flush. Multiple entries can be selected.To configure a specific length of time for an entry to time out, enter a value in minutes in the ARP Cache entry time out (minutes) field.