How To find out the value of your CLUSTER_NAME for oracle RAC
Do the following from the CRS_HOME.
cd $CRS_HOME/bin
./cemutlo -n
or
./ ocrdump
Do the following from the CRS_HOME.
cd $CRS_HOME/bin
./cemutlo -n
or
./ ocrdump
Oracle RAC interview questions, Oracle Dataguard, ASM, CRS, Oracle wait events, Performance Tuning