LOG_ARCHIVE_DEST_n - where the redo data is to be archived on the primary and standby systems.
LOG_ARCHIVE_CONFIG - enables the database to send and receive redo.
If not specify log_Archive_config,what happened? The default value should handle it. ( SEND, RECEIVE, NODG_CONFIG ).
By default, the LOG_ARCHIVE_CONFIG parameter enables the database to send and receive redo.
Is shipping stopped to standby? No.
So why we need to set log_Archive_config again?
Recommended, but not required for Data Guard. To identify the DB_UNIQUE_NAME for the primary
database and each standby database in the Data Guard configuration.
I have mine set the same way the mseberg says. I think that's how it is in the documentation and I believe it's so that if you switch the primary and the standby then then can both be the primary and standby without you having to change the config. I could be wrong on that though...