Owner's Manual

12 Troubleshooting
Networking
Cluster Verification Utility (Cluvfy) Fails Displaying ERROR: PRVF-6020
When you enable a jumbo frame for the Ethernet interface used for iSCSI
storage connection with different Maximum Transmission Unit (MTU)
values compared to public and private network interface, and then you
execute Cluvfy, the node connectivity prerequisite check fails and the
following error message is displayed: Different MTU values used
across network interfaces in subnet address.
Ignore the PRVF-6020 error message and proceed with the installation.
Oracle Grid Infrastructure Installation Fails During Node Connectivity
Prerequisite Check
If you set different MTU values for the ISCSI interface than the public and
private interface during the Oracle Grid Infrastructure installation, the node
connectivity prerequisite check fails and the following error message is
displayed: Different MTU values used across network
interfaces in subnet address.
To resolve this issue, ignore the error message and select Ignore All check box
present at the top of the Organizational Unit Identifier (OUI) screen, and
then proceed with the installation.
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
When you install Oracle 11g R2 Clusterware by starting NTP daemon
without slewing the option -x, the NTP prerequisite check fails.
Add the –x option in /etc/sysconfig/ntpd file as shown below and restart ntpd.
[root@node1]# cat /etc/sysconfig/ntpd
# Drop root to id 'ntp:ntp' by default.
11GR2TG.book Page 12 Wednesday, August 4, 2010 12:31 PM