Setting up Oracle 12c Active Data Guard Database

In the Multitenant world, the PDB Database is considered an independent database but the operational tasks performed at the CDB level effect all the PDB databases plugged into it. The task of setting up of a Data Guard, switching or failing over are all performed at the CDB level. When the Data Guard is initially setup, with the CDB database, all PDB’s are also replicated to the target. Read more here.