1)Installed single node EBSR12.1.1 and applied pre-req patches as per ID 823587.1Why did you install Database software 11gR2 in Step 4 if you have already upgraded the database to 184.108.40.206 in Step 2? How many 11gR2 ORACLE_HOME you have installed?
2)Upgraded EBS database from 11gR1(220.127.116.11) to 11gR2(18.104.22.168)
3)Install Oracle Clusterware 11g Release 2(22.214.171.124)
4)Install Oracle Database Software 11g Release 2 on both nodes (only software installation with RAC option on both nodes, not database upgrade using this home bcz i have already done database upgrade in step 2)
But as per metalink [ID 823587.1] says "Upgrade Applications Database to 11g Release 2 ".Please help me what else I need to do as part of step 4.Do I need to perform upgrade once again or skip the upgrade step.I do not understand why you had to lay down the 11gR2 software again if you have already done so as part of the 11gR1 to 11gR2 upgrade.
I have three ORACLE_HOME installed as part of RAC InstallationYou do not need the old ORACLE_HOME and you just need two ORACLE_HOMEs (Grid + ORACLE_HOME with RAC option).
1) Grid Infrastructure Home
2)11gR2 ORACLE_HOME(old) for single node EBSR12.1.1
3)11gR2 ORACLE_HOME installed on two nodes installed with RAC option
Ans:The ORACLE_HOME that already I have upgraded to 11gR2 is part of single node installation not RAC.Please let me know can I just copy these binaries to second node instead of step 4 ?Yes, or I would say configure ORACLE_HOME which you installed in step 4 with your database by configuring the context/env files and recreate the appsutil directory.