Hi,
I am not sure what I can provide you if you do not have a lab to look at and reference.
The Cluster probe enables failover support for the probes in a clustered environment. The probe configurations that are saved in a resource group remain the same, even when that resource group moves to another cluster node. The probe sends alarms when a resource group or cluster node changes state.
Please try reading through this section of the documentation as it has screen shots that might help explain the process to you.
https://docops.ca.com/ca-unified-infrastructure-management-probes/ga/en/alphabetical-probe-articles/cluster-clustered-environment-monitoring/cluster-versions-3-3-3-1/v3-3-cluster-im-configuration/v3-3-cluster-im-gui-reference
But the short answer is if the cluster probe is setup correct when node 1 goes down the monitoring for the oracle probe will move t node 2 and continue.