The value of tmnxDot1agCfmMepFcltyInstance indicates the specific facility instance that a facility MEP has affected via a raised or cleared event. This value is used in combination with its tmnxDot1agCfmMepFcltyType. The possible facility types and instance forms are described in the following table: Facility Type | Facility Instance port | slot/mda/port lag | lag-id networkInterface | interface name qinqPortTunnelSap | sap-id qinqLagTunnelSap | sap-id The combined value will appear as in the following examples: port 7/2/2 lag 1 networkInterface test qinqPortTunnelSap 2/2/2:100.* qinqLagTunnelSap lag-1:100.* When a facility fault occurs on a QinQ port or lag, the sap executing the CFM functional test, the sap will be included as part of the event log message. However, QinQ facility tunnel MEPs on the sap are only the detection point for the defect / clear condition. The QinQ facility tunnel is port or lag based and a representative outer tag.