Interface ID associated with the PM instance uniquely identifying the interface associated with the PM instance. The value of this object depends on the interface type and may be encoded to suit. For example, when the cienaCesPmInstanceInterfaceType is of type port(1) the value of this object refers to a port identifier (PGID). For some interface types, the value of this object is not sufficient to uniquely identify an interface. In such cases, the cienaCesPmInstanceInterfaceId2 object is used to provide further resolution for uniquely identifying the interface. For such interfaces, the value of this object and the cienaCesPmInstanceInterfaceId2 object may be normalized during row creation as evident by subsequent get of this object and the cienaCesPmInstanceInterfaceId2 object.