A dynamic Ethernet Connectivity Fault Management method, comprising: a first Maintenance End Point, MEP, transmitting an Ethernet notification to at least one remote MEP; the at least one remote MEP receiving the Ethernet notification; and the at least one remote MEP dynamically performing an action while in service based on the Ethernet notification, the action comprising dynamically modifying at least one CFM attribute of the at least one remote MEP; and the first MEP transmitting the Ethernet notification to at least one remote MEP based on one of network congestion, a maintenance event, and a service change;and the at least one remote MEP dynamically performing the action with the action based on the one of network congestion, a maintenance event, and a service change; and based on the service change, the service change comprising adjustment of a criticality of a service, performing the action comprises the at least one remote MEP dynamically adjusting at least one of transmission intervals and defect thresholds associated with Continuity Check Messages responsive to the service change; and based on network congestion, performing the action comprises the at least one remote MEP dynamically adjusting at least one of transmission intervals and defect thresholds associated with Continuity Check Messages; and based on the maintenance event, performing the action comprises the at least one remote MEP performing one of: dynamically adjusting at least one of transmission intervals and defect thresholds associated with Continuity Check Messages; and dynamically suspending Continuity Check Messages. a first Maintenance End Point, MEP, transmitting an Ethernet notification to at least one remote MEP; the at least one remote MEP receiving the Ethernet notification; and the at least one remote MEP dynamically performing an action while in service based on the Ethernet notification, the action comprising dynamically modifying at least one CFM attribute of the at least one remote MEP; and the first MEP transmitting the Ethernet notification to at least one remote MEP based on one of network congestion, a maintenance event, and a service change;and the at least one remote MEP dynamically performing the action with the action based on the one of network congestion, a maintenance event, and a service change; and based on the service change, the service change comprising adjustment of a criticality of a service, performing the action comprises the at least one remote MEP dynamically adjusting at least one of transmission intervals and defect thresholds associated with Continuity Check Messages responsive to the service change; and based on network congestion, performing the action comprises the at least one remote MEP dynamically adjusting at least one of transmission intervals and defect thresholds associated with Continuity Check Messages; and based on the maintenance event, performing the action comprises the at least one remote MEP performing one of: dynamically adjusting at least one of transmission intervals and defect thresholds associated with Continuity Check Messages; and dynamically suspending Continuity Check Messages. dynamically adjusting at least one of transmission intervals and defect thresholds associated with Continuity Check Messages; and dynamically suspending Continuity Check Messages.