DGMGRL for 32-bit Windows: Version 126.96.36.199.0 - Production
Copyright (c) 2000, 2009, Oracle. All rights reserved.
Welcome to DGMGRL, type "help" for information.
DGMGRL> connect sys/xxxx@noida
DGMGRL> switchover to 'red';
Performing switchover NOW, please wait...
Error: ORA-16789: standby redo logs not configured
Unable to switchover, primary database is still "noida"
This error generally occur because the Standby redo logs were not configured for the database.
SQL> ALTER DATABASE add standby LOGFILE GROUP 6 'C:\APP\NEERAJS\ORADATA\NOIDA\REDO06.LOG' size 50m ;
Now it's is not giving any further error .