DB version: 11.2.0.3
Platform : RHEL 5.8
Standby Type: Physical Standby
All the primary DBs in our shop have its DB_UNIQUE_NAME set as same as DB_NAME.
Like
-- In primary
SQL> select name, db_unique_name from v$database;
NAME DB_UNIQUE_NAME
--------- ------------------------------
GCLRPMS GCLRPMS
As you can see in the below article by Bhavin Hingu, where he names the primary's DB_UNIQUE_NAME to be different than DB_NAME .
http://www.oracledba.org/11gR2/dr/11gR2_dataguard_RAC_to_RAC.html
DB_NAME= BHAVIN
DB_UNIQUE_NAME= USA
Is this recommended ? Do you think it is good for role reversals ?