Flushing the ARP Cache

It is sometimes necessary to flush the ARP cache when the IP address has changed for a device on the network. As 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.

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; see ARP Settings.

To flush a dynamic entry in the ARP Cache table

1. Click the Flush ARP Cache icon by using mouse-over on the right side of the entry.

To flush one or more dynamic entries in the ARP Cache table

1. Select the checkbox(es) of one or more entries to be flushed. Flush becomes active.
2. Click the Flush ARP Cache icon.

To flush all the dynamic entries in the ARP Cache table

1. Click the top checkbox located in the top left heading row. All dynamic entries are selected.
2. Click the Flush ARP Cache icon.