Things to remember while configuring Clustered and Non clustered.
Clustered :
1) None of the node uses Network to Archive Logs.
2) Filename written by a node can be read by any node in the cluster.
3) RMAN can back up all logs from any node in the cluster
4) Each node can read the logs written by itself and any other node.
Sample :
/arc_dest/log_1_1001_23452345.arc <- thread 1 archived in node3
/arc_dest/log_3_1563_23452345.arc <- thread 3 archived in node2
/arc_dest/log_2_753_23452345.arc <- thread 2 archived in node1