extremeEapsSharedPortSegmentTimerExpiryAction 1.3.6.1.4.1.1916.1.18.5.1.4

This indicates the action taken by the EAPS Shared port instance when a segment timer expires. If the action is sendAlert, then when the segment timer expires, an SNMP trap will be sent, and the segment will remain in Up state, with the failed flag set to True. If the action is segmentDown, then when the timer expires, the segment will be set to Down state.