This boolean specifies whether a fault detected on a Facility MEP is passed along to notify the port or facility tunnel it's associated with; it only applies to Facility MEPs, and changing it away from its default on a non-facility MEP raises an inconsistentValue error. An admin enables this so a fault detected purely at the facility (port/LAG or interface) level actually surfaces as a fault against that underlying resource, not just as an isolated CFM alarm. It's a key setting for using facility MEPs as a way to detect transport-level faults independent of any specific customer service.