An RRSF node is an MVS™ system image that has been defined as an RRSF node to RACF® by a TARGET command. For information about defining RRSF nodes with the TARGET command, see z/OS Security Server RACF System Programmer's Guide.

To direct commands or application updates from one MVS system image to another or synchronize passwords between users on two or more MVS system images, both system images must first be defined to RACF as RRSF nodes that can communicate with each other.