Step 1: Ensure that servers are ping each other
Step 2: Check the opmn ports ( $ORACLE_HOME/opmn/conf/opmn.xml)
Step 3:
#Server 1
opmnctl config topology update discover="server2.domain.cy:6200"
opmnctl reload
#Server 2
opmnctl config topology update discover="server1.domain.cy:6200"
opmnctl reload
Check the status of the cluster
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opmnctl @cluster status
delete a note
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opmnctl config topology delete discover
opmnctl reload