PRVG-11368 : A SCAN is recommended to resolve to 3 or more

resolv.conf Integrity : This task checks consistency of file /etc/resolv.conf file across nodes.  Single Client Access Name (SCAN) - This test verifies the Single Client Access Name configuration.    Verification WARNING result on node: rac1 Details:  - PRVG-11368 : A SCAN is recommended to resolve to "3" or more IP addresses, but SCAN "rac-scan" resolves to only "10.20.30.105" - Cause:An insufficient number of SCAN IP addresses were defined for the specified SCAN. - Action:Define at least specified number of SCAN IP addresses in DNS for the SCAN.    Verification WARNING result on node: rac2 Details:  - PRVG-11368 : A SCAN is recommended to resolve to "3" or more IP addresses, but SCAN "rac-scan" resolves to only "10.20.30.105" - Cause:An insufficient number of SCAN IP addresses were defined for the specified SCAN. - Action:Define at least specified number of SCAN IP addresses in DNS for the SCAN. Cause: Oracle recommends to use 3 SCAN IPs to distribute applciation connection load across all nodes with the help of DNS. If you use one scan IP in /etc/hosts file then you will get the above error message. Solution: If you are not using DNS then simply rename below files on all the cluster nodes to avoid this issue. You can later again rename these files to their original names if you want to use DNS. Node1: [root@rac1 ~]# ls -ltr /etc/resolv.conf  -rw-r--r--. 1 root root 49 Jun 11 12:54 /etc/resolv.conf [root@rac1 ~]# mv /etc/resolv.conf /etc/resolv.conf_bkp [root@rac1 ~]# ls -ltr /etc/nsswitch.conf lrwxrwxrwx. 1 root root 29 Jun 11 13:13 /etc/nsswitch.conf -> /etc/authselect/nsswitch.conf [root@rac1 ~]# mv /etc/nsswitch.conf /etc/nsswitch.conf_bkp Node2: [root@rac2 ~]# ls -ltr /etc/resolv.conf  -rw-r--r--. 1 root root 49 Jun 11 12:54 /etc/resolv.conf [root@rac2 ~]# mv /etc/resolv.conf /etc/resolv.conf_bkp [root@rac2 ~]# ls -ltr /etc/nsswitch.conf lrwxrwxrwx. 1 root root 29 Jun 11 13:13 /etc/nsswitch.conf -> /etc/authselect/nsswitch.conf [root@rac2 ~]# mv /etc/nsswitch.conf /etc/nsswitch.conf_bkp