Configuring Mac Address Notification Traps - Cisco Catalyst 3750 Software Configuration Manual

Chapter 5 Administering the Switch

Configuring MAC Address Notification Traps

MAC address notification enables you to track users on a network by storing the MAC address activity
on the switch. Whenever the switch learns or removes a MAC address, an SNMP notification can be
generated and sent to the NMS. If you have many users coming and going from the network, you can set
a trap interval time to bundle the notification traps and reduce network traffic. The MAC notification
history table stores the MAC address activity for each hardware port for which the trap is enabled. MAC
address notifications are generated for dynamic and secure MAC addresses; events are not generated for
self addresses, multicast addresses, or other static addresses.
Beginning in privileged EXEC mode, follow these steps to configure the switch to send MAC address
notification traps to an NMS host:
Command
Step 1 configure terminal
Step 2
snmp-server host host-addr {traps | informs} {version {1
| 2c | 3}} community-string notification-type
Step 3
snmp-server enable traps mac-notification
Step 4 mac address-table notification
Step 5
mac address-table notification [interval value] |
[history-size value]
78-15870-01
Purpose
Enter global configuration mode.
Specify the recipient of the trap message.
For host-addr, specify the name or address of the
•
NMS.
• Specify traps (the default) to send SNMP traps
to the host. Specify informs to send SNMP
informs to the host.
• Specify the SNMP version to support. Version 1,
the default, is not available with informs.
• For community-string, specify the string to send
with the notification operation. Though you can
set this string by using the snmp-server host
command, we recommend that you define this
string by using the snmp-server community
command before using the snmp-server host
command.
• For notification-type, use the mac-notification
keyword.
Enable the switch to send MAC address traps to the
NMS.
Enable the MAC address notification feature.
Enter the trap interval time and the history table size.
• (Optional) For interval value, specify the
notification trap interval in seconds between
each set of traps that are generated to the NMS.
The range is 0 to 2147483647 seconds; the
default is 1 second.
(Optional) For history-size value, specify the
•
maximum number of entries in the MAC
notification history table. The range is 0 to 500;
the default is 1.
Catalyst 3750 Metro Switch Software Configuration Guide
Managing the MAC Address Table
5-23