Oracle Data Guard Startup & Shutdown Steps

 Data Guard Shutdown Sequence

Stop log apply service or MRP and shutdown the standby

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
SQL> SHUT IMMEDIATE;

Stop log shipping from primary and shutdown primary database
SQL> ALTER SYSTEM SET log_archive_dest_state_2='DEFER';
SQL> SHUT IMMEDIATE;
Data Guard Startup Sequence
Startup primary database and enable log shipping:
SQL> STARTUP;
SQL> ALTER SYSTEM SET log_archive_dest_state_2='ENABLE';
Startup standby and enable log apply service or MRP:
SQL> startup nomount;
SQL> alter database mount standby database;

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;

Thanks ,