Use the cluvfy comp scan component verification command to check the Single Client Access Name (SCAN) configuration.
cluvfy comp scan [-verbose]
If you include the -verbose option, then CVU prints detailed output.
Verifying the SCAN configuration
To verify that the SCAN and SCAN listeners are configured and operational on all nodes in the cluster, use the following command:
cluvfy comp scan
This command produces output similar to the following:
Verifying scan Checking Single Client Access Name (SCAN)... Checking TCP connectivity to SCAN Listeners... TCP connectivity to SCAN Listeners exists on all cluster nodes Checking name resolution setup for “node1.example.com"... Verification of SCAN VIP and Listener setup passed Verification of scan was successful.