Data Guard Broker

ALTER SYSTEM SET dg_broker_start=true;

dgmgrl sys/oracle@orcl

CREATE CONFIGURATION orcl_config AS PRIMARY DATABASE IS orcl CONNECT IDENTIFIER IS orcl;
ADD DATABASE orcl_stb AS CONNECT IDENTIFIER IS orcl_stb MAINTAINED AS PHYSICAL;

ENABLE CONFIGURATION;

SHOW CONFIGURATION;
SHOW DATABASE orcl;
SHOW DATABASE orcl_stb;