MAC addresses that are dynamically learned are stored in MAC address table. The MAC address aging feature provides a mechanism to flush out the dynamic MAC addresses that remain inactive for a specified period.
The aging time of dynamic MAC address entries can be configured using the mac-address-table aging-time command. The MAC aging time can be configured to a value from 60 through 86400 seconds. By default, the aging time of dynamic MAC address entries is 300 seconds. The configured MAC aging time is applied to all MAC addresses in the system. You can disable the MAC address aging by specifying the aging time as 0 (zero).
Note
MAC address aging configuration per VLAN is not supported.