This is the relative name of this FC network-interface-configuration object, the short local identifier distinguishing it from sibling configuration objects under the same adapter. Since NicIfConfig is a small, largely address-only object in this MIB, the RN is primarily useful for confirming which interface's configuration record a script is currently reading when walking multiple adapters. For example, an RN that encodes the interface index lets an admin match this record to a specific vHBA without re-parsing the full DN each time.