How to check the connectivity between primary and standby database

How to check the connectivity between primary and standby database

From DR/STANDBY:

C:\Users\Administrator>sqlplus sys@PRODORA1 as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Mar 16 09:22:14 2022

Copyright (c) 1982, 2017, Oracle.  All rights reserved.

Enter password:

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select database_role from v$database;

DATABASE_ROLE

-----------------

PRIMARY

SQL>

From MAIN/PRIMARY:

C:\Users\Administrator>sqlplus sys@PRODDR1 as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Wed Mar 16 09:22:14 2022

Copyright (c) 1982, 2017, Oracle.  All rights reserved.

Enter password:

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select database_role from v$database;

DATABASE_ROLE

-----------------------------

PHYSICAL STANDBY

SQL>