When set to enabled(1), the agent issues a syslog message
when the MAC address threshold as defined in the
etsysMACLockingFirstArrivalStationsAllocated object has been
reached.
Arrival of these messages is not guaranteed and the message
generation rate is not required to match the detection rate.
A best effort delivery is acceptable.
When disabled(2), no messages are sent as a result of the
threshold being reached.