This selects whether signal degrade detection on this MEP compares only near-end frame loss against the set/clear thresholds ('nearEnd' mode) or compares both near-end and far-end frame loss against those same thresholds ('nearFarEnd' mode), as explicitly described for the object. An admin picks nearFarEnd when the degradation being monitored for could plausibly originate on either side of the path (such as on a symmetric point-to-point circuit), while nearEnd suffices when only this MEP's own receive-side degradation is of concern. For example, setting cienaCesCfmMEPSignalDegradeTriggerMode to nearFarEnd on a circuit prone to intermittent issues on the remote end as well would ensure a far-end-only degradation still triggers the alarm, which nearEnd mode alone would miss.