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.*'