This is the relative name (RN) — the last, local segment of the DN — that distinguishes one specific FC port's current error-statistics object from its siblings under the same parent object. For this FC port's live, current error-statistics record, the RN is what a script or the UCS Manager UI displays as the object's short name once you have already navigated to the parent port or task. For example, an RN of 'err-stats' or 'fc-1' tells you at a glance which child object you are looking at without re-parsing the entire DN.