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Catalyst 3750 Metro Switch Command Reference
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Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
mac address-table notification
Usage Guidelines The MAC address notification change feature sends Simple Network Management Protocol (SNMP)
traps to the network management system (NMS) whenever a new MAC address is added or an old
address is deleted from the forwarding tables. MAC change notifications are generated only for dynamic
and secure MAC addresses and are not generated for self addresses, multicast addresses, or other static
addresses.
When you configure the history-size option, the existing MAC address history table is deleted, and a
new table is created.
You enable the MAC address notification change feature by using the mac address-table notification
change command. You must also enable MAC address notification traps on an interface by using the
snmp trap mac-notification change interface configuration command and configure the switch to send
MAC address traps to the NMS by using the snmp-server enable traps mac-notification change global
configuration command.
You can also enable traps whenever a MAC address is moved from one port to another in the same VLAN
by entering the mac address-table notification mac-move command and the snmp-server enable
traps mac-notification move global configuration command.
To generate traps whenever the MAC address table threshold limit is reached or exceeded, enter the mac
address-table notification threshold [limit percentage] | [interval time] command and the snmp-server
enable traps mac-notification threshold global configuration command.
Examples This example shows how to enable the MAC address-table change notification feature, set the interval
time to 60
seconds, and set the history-size to 100 entries:
Switch(config)# mac address-table notification change
Switch(config)# mac address-table notification change interval 60
Switch(config)# mac address-table notification change history-size 100
You can verify your settings by entering the show mac address-table notification privileged EXEC
command.
Related Commands Command Description
clear mac address-table notification Clears the MAC address notification global counters.
show mac address-table notification Displays the MAC address notification settings on all
interfaces or on the specified interface.
snmp-server enable traps Sends the SNMP MAC notification traps when the
mac-notification keyword is appended.
snmp trap mac-notification change Enables the SNMP MAC notification trap on a specific
interface.
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