Specifications

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Catalyst 2950 and Catalyst 2955 Switch Command Reference

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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.

mac address-table aging-time [0 | 10–1000000]

no mac address-table aging-time [0 | 10–1000000]

Note Beginning with Release 12.1(11)EA1, the mac address-table aging-time command replaces the

mac-address-table aging-time command (with the hyphen). The mac-address-table aging-time

command (with the hyphen) will become obsolete in a future release.

Syntax Description

Defaults The default is 300 seconds.

Command Modes Global configuration

Command History

Usage Guidelines If hosts do not send continuously, increase the aging time to record the dynamic entries for a longer time.

This reduces the possibility of flooding when the hosts send again.

Examples This example shows how to set the aging time to 200 seconds:

Switch(config)# mac address-table aging-time 200

This example shows how to disable aging in VLAN 1.

Switch(config)# mac address-table aging-time 0

0 This value disables aging. Static address entries are never aged or removed

from the table.

10–100000 Aging time in seconds. The range is 10 to 1000000 seconds.

Release Modification

12.0(5.2)WC(1) This command was first introduced.

12.1(6)EA2 The aging-time values were modified.

12.1(11)EA1 The mac-address-table aging-time command was replaced by the mac

address-table aging-time command.