There are four configuration files needs to be prepared on both sides, the first three are network-related, the last one is for remote authentication of users with SYSDBA:
/etc/hosts
Register all domain information of four nodes on it, for example:
Edit listener.ora on other nodes in a similar way.
[oracle@primary02 ~]$ vi /u01/app/11.2.0/grid/network/admin/listener.ora ... [oracle@standby01 ~]$ vi /u01/app/11.2.0/grid/network/admin/listener.ora ... [oracle@standby02 ~]$ vi /u01/app/11.2.0/grid/network/admin/listener.ora ...
password files
Simply copy the password file from the primary server to standby servers. [oracle@primary01 ~]$ scp /u01/app/oracle/product/11.2.0/db_1/dbs/orapwprimdb1 standby01:/u01/app/oracle/product/11.2.0/db_1/dbs/orapwstandb1 [oracle@primary01 ~]$ scp /u01/app/oracle/product/11.2.0/db_1/dbs/orapwprimdb1 standby02:/u01/app/oracle/product/11.2.0/db_1/dbs/orapwstandb2