arp/mac address cache timeouts

mattcisconet · ‎12-17-2005

Anybody know how long a mac address stays in a Cisco IOS arp cache when issuing "show ip arp"? How about a mac address in a CatOS switch when issuing "show cam dynamic". What constitutes the length of time an arp entry is cached?

Georg Pauwen · ‎12-17-2005

Hello,

the default ARP timeout (show ip arp) is 14400 seconds, which equals 4 hours. The CAM default agingtime (show cam dynamic) is 300 seconds, which equals 5 minutes. That means that the ARP or CAM entry will stay in the cache for a minimum of 4 hours and 5 minutes, respectively...

Is that what you are asking ?

Regards,

GP