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Ignition SCADA Failover Redundancy

I have two redundant machines, each with TOP Server and Ignition SCADA. How can I implement redundancy between the primary and secondary machines using Ignition?

In Ignition under "Redundancy" ⇒ "Master Node Settings", there is a setting for "Recovery Mode." In the case of a failover...

When set to Manual, the Secondary will remain the Master until someone tells the Primary that came back up to take over. (You would manually put the Secondary node back into Cold Standby mode and tell the Primary machine to take over.)

If set to Automatic, when the Primary comes back up, it automatically takes over control from the Secondary machine. (Provided the Secondary node is in Cold standby mode, it starts to shut down its subscriptions for the IO while the Primary is activating all of its subscriptions. This means it is possible dual communication could occur for the period of time that the Secondary is shutting down and the Primary is starting up again.)