This holds the Distinguished Name of the neighboring endpoint object that the physical Ethernet endpoint representing one Ethernet-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 PhysEtherEp instance directly to the exact remote port object UCS Manager believes it is connected to. For example, if peerDn on this PhysEtherEp instance points to an unexpected remote port, the operator has immediate proof of a cabling mistake without needing to physically trace the cable.