On AIX, VIP fails to come up, with error "Invalid Parameters, Or Failed To Bring Up VIP".

Modify the line containing ENTSTAT in $ORA_CRS_HOME/bin/racgvip script as follows:

$ENTSTAT -d $_IF | $GREP -iEq
'.*lan.*state.*:.*operational.*|.*link.*status.*:.*up.*|
.*port.*operational.*state.*:.*up.*|.*driver.*flags.*:.*up.*'

Oracle RAC 11gR2: root.sh fails

Problem:
root.sh fails with the following error:
CRS-4124: Oracle High Availability Services startup failed.
CRS-4000: Command Start failed, or completed with errors.
ohasd failed to start: A specified file does not support the ioctl system call.
ohasd failed to start at /oracle/product/11.2.0/gridhome/crs/install/rootcrs.pl line 451.


Solution:

• Clean the following directories:

/etc/oracle,
/var/tmp/.oracle
/tmp/.oracle

• Rerun root.sh

Debugging Oracle Universal Installer (OUI)

The following command starts Oracle Universal Installer (OUI) with tracing turned on:

$ ./runInstaller -logLevel trace -debug -J-DTRACING.ENABLED=true -J-DTRACING.LEVEL=2