This is the Relative Name (RN) of an RSA keyring, the named container that holds a private key and its associated certificate for use by UCS services, the single naming component that distinguishes this KeyRing instance from its sibling instances under the same parent object. UCS Manager appends this RN to the parent's DN to build the full path, so it is the piece an admin checks when several KeyRing instances exist side by side and need to be told apart, because its state tells you whether the keyring's certificate is valid, pending, or needs to be regenerated. For the default keyring backing the fabric interconnect's HTTPS management interface, if two KeyRing instances share the same parent, this RN is the one field that tells an admin which of the two a given SNMP row is actually describing.