# MAC Notification

Device > Monitor > MAC Notification

This dialog box displays the following data:

- MAC Addresses Learnt (cmnMacAddressesLearnt)

- MAC Addresses Removed (cmnMacAddressesRemoved)

- Notifications Sent (cmnNotificationsSent)

The following list specifies buttons in this dialog box, as well as their function:

- To specify the refresh rate for this dialog box, select a value from the drop-down box.

- Click Start/Stop to begin/end device monitoring.

> Note: The Start/Stop toggle feature is supported only by CiscoView 5.x.

- Click Cancel to close the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access online help.

MAC Addresses Learnt (cmnMacAddressesLearnt)

Number of MAC addresses learned by the device.

MAC Addresses Removed (cmnMacAddressesRemoved)

Number of MAC addresses removed from the forwarding database.

Notifications Sent (cmnNotificationsSent)

Number of cmnMacChangedNotifications sent out by the device.