Unicast ARP request on table entry expiration

You can configure the device to send a unicast ARP request instead of the default broadcast request when an ARP table entry is about to expire. The retry requests are unicast at intervals of 5 seconds. Without this option, the retry requests are broadcast at intervals of 800 milliseconds. This behavior reduces overall ARP broadcast traffic. It also supports the use case where access nodes are configured not to forward broadcast ARP requests toward customer CPEs for security reasons and to instead translate ARP broadcasts to unicast requests. You can verify whether this feature is configured by using the following command: show configuration system arp | grep unicast-mode-on-expire.