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Managing MAC Address Table MAC Address Configurations
User Guide 159
Step 2 mac address-table aging-time
aging-time
Set your desired length of address aging time for dynamic address entries.
aging-time:
Set the length of time that a dynamic entry remains in the MAC address table after
the entry is used or updated. The valid values are from10 to 630. Value 0 means the Auto
Aging function is disabled. The default value is 300 and we recommend you keep the default
value if you are unsure.
Step 3 end
Return to privileged EXEC mode.
Step 4 copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to modify the aging time to 500 seconds. A dynamic
entry remains in the MAC address table for 500 seconds after the entry is used or updated.
Switch#configure
Switch(config)# mac address-table aging-time 500
Switch(config)#show mac address-table aging-time
Aging time is 500 sec.
Switch(config)#end
Switch#copy running-config startup-config
2.2.3 Adding MAC Filtering Address Entries
Follow these steps to add MAC filtering address entries:
Step 1 configure
Enter global configuration mode.
Step 2 mac address-table filtering
mac-addr
vid
vid
Add the filtering address to the VLAN.
mac-addr:
Specify a MAC address to be used by the switch to filter the received packets. The
switch will drop packets of which the source address or destination address is the specified
MAC address. The format is xx:xx:xx:xx:xx:xx, for example, 00:00:00:00:00:01.
vid:
Specify an existing VLAN in which packets with the specific MAC address will be dropped.
Step 3 end
Return to privileged EXEC mode.
Step 4 copy running-config startup-config
Save the settings in the configuration file.
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