Owner's Manual

14 Troubleshooting
Networking
The Cluster Verification Check Fails
This issue occurs when the public network IP address is not routable.
For example: 192.168.xxx.xxx
To resolve this issue, assign a valid, routable public IP address.
Network Time Protocol (NTP) Prerequisite Check Fails During
Oracle 11g R2 Clusterware Installation
NTP prerequisite check fails when you install Oracle 11g R2 Clusterware
by starting NTP daemon without the slewing option -x.
Add the –x option in /etc/sysconfig/ntpd file as shown below and restart the ntpd.
[root@node1]# cat /etc/sysconfig/ntpd
# Drop root to id 'ntp:ntp' by default.
OPTIONS="-x -u ntp:ntp -p /var/run/ntpd.pid"
# Set to 'yes' to sync hw clock after successful
ntpdate
SYNC_HWCLOCK=no
# Additional options for ntpdate
NTPDATE_OPTIONS=""
[root@node1]#
After making the above changes at both the nodes, run the cluvfy script
and verify if the output related to NTP has passed.