Entries are automatically created and deleted from this
table, and exist whenever the OAM entity supports Ethernet OAM
events (as indicated by the eventSupport bit in
hwDot3ahEfmFunctionsSuppported). Values in the table are
maintained across changes to the value of hwDot3ahEfmOperStatus.
Event configuration controls when the local management entity
sends Event Notification OAMPDUs to its OAM peer, and when
certain event flags are set or cleared in OAMPDUs.