This read-create Dot1agCfmMepIdOrZero object, applicable only to point-to-multipoint probes per its description, identifies the destination MEP by its Remote MEP (RMEP) ID, with the MAC address then looked up from the RMEP database, but only when esaProbeDestinationMepType is set to 'mepid' and CC protocol is enabled between the two MEPs. An administrator prefers this method when continuity check is already running, since it avoids having to hard-code a MAC address. For example, an operator on a network with CFM CC enabled would set esaProbeDestinationMepId to the remote MEP's ID rather than manually entering its MAC address in esaProbeDestinationMepMacAddr.