This OID returns the Relative Name (RN) of an FC "established" endpoint — one FC-capable interface (uplink, FEX port, or similar) that UCSM has discovered and is tracking on the SAN fabric, given as a SnmpAdminString — the naming fragment that distinguishes this instance from its sibling FcEstcEp objects under the same parent in UCSM's object tree. Admins use the RN, combined with the parent's DN, to reconstruct exactly where this FcEstcEp instance sits in the hierarchy without needing the full DN string on its own. For example, if two FcEstcEp instances exist under the same parent object, their RNs are what differentiate row one from row two when UCSM lists both under that parent.