# History Table

## Navigation

Device > Configure > MAC Notification > History Table

The following information appears:

- MAC Change Notification Index (cmnHistIndex)

- Time Stamp (cmnHistTimestamp)

With a table entry selected, click MAC Change Messages to view the MAC change notification event information for that entry.

### MAC Change Notification Index (cmnHistIndex)

An index that uniquely identifies a MAC change notification event previously generated by the device. This object starts at one and increases by one each time a MAC change notification is generated. When this object reaches its maximum value, the agent wraps its value back to one.

### Time Stamp (cmnHistTimestamp)

The value of sysUpTime when the cmnMacChangedNotification containing the information provided by this entry's cmnHistMacChangedMsg object was generated.