An entry that contains objects used to manage a logical or physical interface representing a single elementary packet stream at the point where the CDL path defect indications are terminated. Typically, this is a point where the CDL Ethernet encapsulation is applied and removed. This can also be a point between a part of the CDL network that supports packet-by-packet multiplexing, and a part of the CDL network that does not support packet-by-packet multiplexing. This interface may have ifType value other than 'ethernetCsmacd', if traffic from a non-Ethernet protocol is received on this interface and then encapsulated (or otherwise interworked) in Ethernet and then CDL, before being progressed into the CDL network.