Alcatel OmniSwitch 6800 Series Network Configuration Manual page 60

Configuring MAC Address Table Aging Time
By default, the aging time is set to 300 seconds (5 minutes) and is configured on a global basis using the
mac-address-table aging-time
to 1200 seconds (20 minutes):
-> mac-address-table aging-time 1200
A MAC address learned on any VLAN port will age out if the time since a packet with that address was
last seen on the port exceeds 1200 seconds.
Note. Note that the aging time used is twice the length in time of the actual value specified. For example,
if an aging time of 60 seconds is specified, the MAC will age out after 120 seconds of inactivity.
When using the mac-address-table aging-time command in a switch configuration file (e.g., boot.cfg),
include an instance of this command specifying the VLAN ID for each VLAN configured on the switch.
This is necessary even though if all VLANs will have the same aging time value.
To set the aging time back to the default value, use the no form of the mac-address-table aging-time
command. For example, the following sets the aging time for all VLANs back to the default of 300
seconds:
-> no mac-address-table aging-time
Note. The MAC address table aging time is also used as the timeout value for the Address Resolution
Protocol (ARP) table. This timeout value determines how long the switch retains dynamically learned
ARP table entries. See
To display the aging time value for one or all VLANs, use the
command. For more information about this command, see the OmniSwitch CLI Reference Guide.
page 2-6
command. For example, the following sets the aging time for all VLANs
Chapter 12, "Configuring IP,"
OmniSwitch 6800 Series Network Configuration Guide
for more information.
show mac-address-table aging-time
Managing Source Learning
November 2004