Finance and SLU P in an XRF complex

Finance and SLU P sessions in an XRF complex are handled as Class 1, 2, or 3 terminals.

Class 1 attempts to provide a maximum level of transparency and performance by tracking the active IMS session with a standby session on the XRF backup system. Class 2 and 3 support involves terminating the active session if the IMS system fails. At takeover, the alternate IMS system automatically reinitiates the session and automatically signs on the original active system user if necessary. Class 3 support requires manual session restart and signon after XRF takeover.

For information about XRF from a z/OS® perspective, see z/OS Communications Server: SNA Network Implementation Guide.