Tag: ORA-16642: DB_UNIQUE_NAME mismatch

“ORA-16642: DB_UNIQUE_NAME mismatch” while adding a Standby Database into DG Broker

The following error occurs while trying to add standby database into data guard broker.

DGMGRL>  ADD DATABASE TESTDB  AS CONNECT IDENTIFIER is TESTDB_DR MAINTAINED AS PHYSICAL;
Error: ORA-16642: DB_UNIQUE_NAME mismatch

REASON

Here primary and standby database DB_UNIQUE_NAME is same as “TESTDB”. Make sure DB_UNIQUE_NAME for primary and all standby databases are different.