This holds the Distinguished Name of the neighboring endpoint object that the physical Fibre Channel endpoint representing one FC-facing port on the fabric interconnect, together with the neighbor device it discovers on the wire discovered on the far end of the link. An administrator tracing a suspected miswiring follows peerDn from this PhysFcEp instance directly to the exact remote port object UCS Manager believes it is connected to. For example, if peerDn on this PhysFcEp instance points to an unexpected remote port, the operator has immediate proof of a cabling mistake without needing to physically trace the cable.