3Com 5500G-EI Command Reference Guide - Page 435

MAC Address Table Management Commands 435 Parameter aging age: Specifies the aging time (measured in seconds) of the Layer-2 dynamic address table entry, ranging from 10 to 1000000; by default, the aging time is 300 seconds. no-aging: No aging time. Description Use the mac-address timer command to configure the aging time of the Layer-2 dynamic address table entry. Use the undo mac-address timer command to restore the default value. Setting the aging time on the switch to be too long or too short will cause the switch to broadcast data packets without MAC addresses, this will affect the operational performance of the switch. If the aging time is set too long, the switch will store out-of-date MAC address tables. This will consume MAC address table resources and the switch will not be able to update MAC address table according to the network change. If aging time is set too short, the switch may delete valid MAC address table entries. Example Configure the entry aging time of Layer-2 dynamic address table to be 500 seconds. system-view System View: return to User View with Ctrl+Z. [SW5500]mac-address timer aging 500