This is the Relative Name (RN) of a certificate signing request being assembled for a UCS keyring, the single naming component that distinguishes this CertReq 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 CertReq instances exist side by side and need to be told apart, because it holds the fields UCS Manager will bundle into the CSR sent to a certificate authority. For a CSR being generated for the fabric interconnect's management HTTPS certificate, if two CertReq 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.