Execute RMAN script on only one host (Failover VIP is not available and backup is not load balanced)

In this configuration, hostname1 or vipname1 and hostname2 or vipname2 allow connections to the respective hosts in the cluster. You need a special configuration to ensure that the backup script executes on at least one of the hosts but not on both hosts. Otherwise, a backup may not occur if the specified instance is down, or a redundant backup occurs if both of the specified instances are active.

 

I am trying to setup this type of backup but the document does not mention how the special configuration can be done? Has anybody configured this before and get me a heads up.

 

Thanks very much...