Mac Address-Table Aging-Time - Cisco Catalyst 3560-X Command Reference Manual

mac address-table aging-time

mac address-table aging-time
Syntax Description
Defaults
Command Modes
Command History
Usage Guidelines
Examples
Related Commands
Catalyst 3750-X and 3560-X Switch Command Reference
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Use the mac address-table aging-time global configuration command on the switch stack or on a
standalone switch 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.
mac address-table aging-time {0 | 10-1000000} [vlan vlan-id]
no mac address-table aging-time {0 | 10-1000000} [vlan vlan-id]
0 This value disables aging. Static address entries are never aged or removed from
the table.
10-1000000 Aging time in seconds. The range is 10 to 1000000 seconds.
vlan vlan-id (Optional) Specify the VLAN ID to which to apply the aging time. The range is 1
to 4094.
The default is 300 seconds.
Global configuration
Release Modification
12.2(53)SE2 This command was introduced.
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.
If you do not specify a specific VLAN, this command sets the aging time for all VLANs.
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.
Command
show mac address-table aging-time
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Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
Description
Displays the MAC address table aging time for all VLANs
or the specified VLAN.
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