select "1" from main menu.
purpose:
a port's mac address register is cleared on power-up, or hardware reset. if this item is enabled, the dynamically learned sa will be leared if it is not refreshed in less than the aging time.
default:
enable with aging time 5 minutes.
example : enable aging control with aging time 2 minutes.
1. type 'e' or 'e' to enable aging control
2. input '2' for aging time and back to main menu