A router running Host-Mobility will send a unicast ARP every two-and-a-half minutes to learned addresses, provided the MAC is in the SAT which has a default time out of five minutes . the router sends a unicast ARP to the server every two-and-a-half minutes to avoid the SAT being cleared before the ARP is sent to the server.
Configure the ARP time out for four hours (14400 seconds) and the SAT time out higher at 14700 seconds to increase SAT and ARP cache efficiency.
arp timeout 14400
set mac agetime 14700