2.4 If you have an Oracle RAC or Oracle RAC One Node database configured on the cluster and you have a local Oracle home, then do the following to extend the Oracle database home to node3:
Navigate to the Oracle_home/oui/bin directory on node1 and run the addNode.sh script as the user that installed Oracle RAC using the following syntax:
$ ./addNode.sh "CLUSTER_NEW_NODES={node3}"
Run the Oracle_home/root.sh script on node3 as root, where Oracle_home is the Oracle RAC home.