# MAC Notification

## Navigation

Device > Configure > MAC Notification > Management

The following information appears:

- MAC Notification Feature Enabled (cmnGlobalFeatureEnabled)

- MAC Notification Interval (cmnNotificationInterval)

- No. of MAC Addr Added (cmnMacAddressesLearnt)

- No. of MAC Addr Removed (cmnMacAddressesRemoved)

- MAC Notification Traps (cmnNotificationsEnabled)

- No. of Notifications Sent (cmnNotificationsSent)

- History Table Maximum Length (cmnHistTableMaxLength)

### MAC Notification Feature Enabled (cmnGlobalFeatureEnabled)

Indicates whether the MAC notification feature is currently running on the device. When this feature is enabled (the value of this object is true(1)), cmnIfConfigTable determines whether MAC notification is also taking place on each interface.

### MAC Notification Interval (cmnNotificationInterval)

Maximum interval of time between cmnMacChangedNotifications generated by the device. Note the following:

- If the value of cmnNotificationsEnabled is true(1), then the device sends out generated cmnMacChangedNotifications and archives the MAC change notification events in cmnHistoryTable.

- If the value of cmnNotificationEnabled is false(2), then the device does not send out generated cmnMacChangedNotifications, but it does archive these events in cmnHistoryTable.

- If the value of this object is zero, then the device generates cmnMacChangedNotifications and archives the MAC change notification events in cmnHistoryTable as soon as a MAC address is either learned or removed by the device.

- If the value of this object is greater than zero, then the device waits for a period of time (specified by the value of this object) before generating cmnMacChangedNotifications and archiving the MAC change notification events in cmnHistoryTable.

### No. of MAC Addr Added (cmnMacAddressesLearnt)

Number of MAC addresses learned by the device.

### No. of MAC Addr Removed (cmnMacAddressesRemoved)

Number of MAC addresses removed from the forwarding database.

### MAC Notification Traps (cmnNotificationsEnabled)

Indicates whether cmnMacChangedNotification notifications are sent when MAC addresses are either learned or removed from the device's forwarding database. Note that disabling notifications does not prevent MAC address information from being added to cmnHistoryTable.

### No. of Notifications Sent (cmnNotificationsSent)

Number of cmnMacChangedNotifications sent out by the device.

### History Table Maximum Length (cmnHistTableMaxLength)

The upper limit on the number of entries that cmnHistoryTable can contain. Valid values range from zero to 500. Note the following:

- A value of zero prevents any entries from being stored.

- When this table is full, the oldest entry is deleted and a new one is created.