If SYSA stops updating its status, the following events occur, based on the policy.

• When the failure detection interval specified on the INTERVAL keyword in SYSA's COUPLExx parmlib member elapses, SYSB detects a status update missing condition for SYSA.
• SYSB waits 20 seconds. If the status update missing condition on SYSA is not resolved, SYSB performs a system reset of SYSA.
• Then, SYSB notifies the group members of the multisystem applications on SYSB that SYSA has failed. Thus, group members on SYSB know that their group members on SYSA are no longer using shared resources and that they must take over their workload.