How to disable active data guard permanently?

Hi All, I'm testing on 11gr2 Active Data Guard, found that whenever I switch off the the Active Data Guard as below:

--start--

On Standby DB:

i) SQL>alter database recover managed standby database cancel;

ii) SQL> alter system set log_archive_dest_state_2=DEFER;

On Primary DB:

i) SQL> alter system set log_archive_dest_state_2=DEFER;

---end--

It will switch back to Active Data Guard mode after I perform a db bounce (shutdown immediate then startup) at standby server. Any Idea?

Thanks.