You cannot display RADIUS server statistics in the Admin Console. You need a management application such as SunNet Manager or Solstice Enterprise Manager. The files required to interoperate with these management applications are provided with Sun Directory Services:
The directory /opt/SUNWconn/ldap/snmp/snm contains all files necessary for dsnmprad to report events to a SunNet Manager station
The directory /opt/SUNWconn/ldap/snmp/sem contains all files necessary for dsnmprad to report events to a Solstice Enterprise Manager station