CONNECT AUXILIARY failing (db names confusion)

Question

Hello,
For the purpose of creating Physical standby Database, I am having connect to AUXILIARY DB issue. I think I am confused between PRIMARY and STANDBY DB names. Please have a look at the configuration and suggest where  I am doing mistake.
Thanks a lot.
# Primary
SQL> select name,db_unique_name from v$database;
NAME      DB_UNIQUE_NAME
JOHN      JOHN
SQL> select * from global_name;
GLOBAL_NAME
JOHN
TNSNAMES.ORA entries on both primary and standby looks like this:
JOHN=
  (DESCRIPTION = - - -
JOHN_DB2
(DESCRIPTION = - -
TNSPING JOHN
TNSPING JOHN_DB2    are working fine.   e.g. from Primary when I do this it return OK (10 msec) . . .
LISTENER.ORA on both have static entries: e.g. on AUXILIARY listener.ora:
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (GLOBAL_DBNAME = john_db2)
      (ORACLE_HOME = /oracle/app/oracle/11g)
      (SID_NAME = john)
lsnrctl stop and start returned no errors.
Here is the error I am concerned:  From Standby I tried to connect:
RMAN> CONNECT TARGET sys/oracle@JOHN;
connected to target database: JOHN (DBID=1279980307)
RMAN> CONNECT AUXILIARY sys/oracle@JOHN_DB2;
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-04006: error from auxiliary database: ORA-12528: TNS:listener: all appropriate instances are blocking new connections
I want to select JOHN_DB2 to for Standby database (at least to differentiate between the two), but I don't know how RMAN recognises the CONNECT IDENTIFIER of the AUXILIARY DB which is not yet replicated/created?
db_name,db_unique_name,instance_name on both are same, i.e. JOHN. I just queries v$parameter on Auxiliary.
Please suggest.
Best Regards

Answer 1

Hi john,
The listener.ora contents should be like below. ie both primary and standby listerner.ora should have the static entry like below
SID_LIST_LISTENER = 
   (SID_LIST= 
       (SID_DESC = 
         (SID_NAME = PLSExtProc) 
          (ORACLE_HOME=/opt/app/oracle/product/11.2.0/db_1) 
         (PROGRAM = extproc) 
       (SID_DESC= 
          (GLOBAL_DBNAME=DB01SBY1) 
          (ORACLE_HOME=/opt/app/oracle/product/11.2.0/db_1) 
          (SID_NAME=DB01SBY1) 
ADR_BASE_LISTENER = /opt/app/oracle 
LISTENER = 
  (DESCRIPTION = 
    (ADDRESS = (PROTOCOL = TCP)(HOST =<host_name>)(PORT = 1521)) 
Kindly post both full listener.ora contents and tnsnames.ora contents in both primary and standby environment.
Regards,
Pradeep. V