Register the database into dataguard:

On primary database only

dgmgrl

connect sys/<password>

show configuration;

================================

If it is not configured then

DGMGRL> show configuration

Error: ORA-16532: Data Guard broker configuration does not exist

Configuration details cannot be determined by DGMGRL

Otherwise:

DGMGRL> show configuration

Configuration

  Name:                abcprod

  Enabled:             YES

  Protection Mode:     MaxPerformance

  Databases:

    fc_abcprod - Primary database

    dr_abcprod - Physical standby database

Fast-Start Failover: DISABLED

Current status for "abcprod":

Warning: ORA-16608: one or more databases have warnings

On DR site:

DGMGRL> show configuration

Configuration

  Name:                abcprod

  Enabled:             YES

  Protection Mode:     MaxPerformance

  Databases:

    fc_abcprod - Primary database

    dr_abcprod - Physical standby database

Fast-Start Failover: DISABLED

Current status for "abcprod":

Warning: ORA-16608: one or more databases have warnings

===================================

Create new dataguard configuration:

Create configuration ABCPROD as primary database is FC_ABCPROD connect identifier is FC_ABCPROD;

add database DR_ABCPROD as connect identifier is  DR_ABCPROD maintained as physical;

DGMGRL> enable configuration;

DGMGRL> show configuration