etsysMACLockingLockedEntryCause 1.3.6.1.4.1.5624.1.2.21.1.4.1.1.1

When management statically provisions a MAC onto this port, then this object is returns static(1). If this MAC was dynamically locked, then this object returns firstArrival(2). If first arrival aging is enabled on the port and the MAC address is dynamically locked, then this object returns agingFirstArrival(3).