Mac Address-Table Aging-Time - Cisco Catalyst 3550 Command Reference Manual

Chapter 2 Cisco IOS Commands

mac address-table aging-time

Use the mac address-table aging-time global configuration command to set the length of time that a
dynamic entry remains in the MAC address table after the entry is used or updated. Use the no form of
this command to return to the default setting. The aging time applies to all VLANs or a specified VLAN.
Beginning with Cisco IOS Release 12.1(11)EA1, the mac address-table aging-time command replaces
Note
the mac-address-table aging-time command (with the hyphen).
Syntax Description
0
10-100000
vlan vlan-id
Defaults The default is 300 seconds.
Command Modes
Global configuration
Command History Release
12.1(4)EA1
12.1(11)EA1
Usage Guidelines
If hosts do not send continuously, increase the aging time to record the dynamic entries for a longer time.
Increasing the time can reduce the possibility of flooding when the hosts send again.
Examples This example shows how to set the aging time to 200 seconds for all VLANs:
Switch(config)# mac address-table aging-time 200
You can verify your setting by entering the show mac address-table aging-time privileged EXEC
command.
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mac address-table aging-time {0 | 10-1000000} [vlan vlan-id]
no mac address-table aging-time {0 | 10-1000000} [vlan vlan-id]
This value disables aging. Static address entries are never aged or removed from
the table.
Aging time in seconds. The range is 10 to 1000000 seconds.
(Optional) Specify the VLAN ID to which to apply the aging time. Valid IDs are
from 1 to 4094.
Modification
This command was first introduced.
The mac-address-table aging-time command was replaced by the mac
address-table aging-time command.
Catalyst 3550 Multilayer Switch Command Reference
mac address-table aging-time
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