Standby Database Switchover Question

Question

I have a Primary and a physical standby database. I have tested switchover and failover to a point. I can't get my client applications to navigate to the "new" primary DB after switchover or failover. I assume it may be something to do with my tnsnames.ora and listener.ora files in my configuration. I will place the contents of the files below.
I was expecting to be able to add the failover syntax to my client tnsnames file and things would be fine. Unfortunately, clinet apps don't failover to "new" Primary ("old" standby DB) when testing failovers; Additionally, when testing switchovers, the client apps try to connect to the "new" standby DB ("old" Primary) instead of the "new" Primary DB.
I was hoping someone might see a syntactical error that is preventing a transparent application failover.
Thanks.
Jim
tnsnames.ora on client:
TESTDB =
(DESCRIPTION=(SOURCE_ROUTE=yes)
     (ADDRESS=(PROTOCOL=tcp)(HOST = oracle1.datacenter.staging)(PORT = 1521))
     (ADDRESS_LIST=(FAILOVER=on)(LOAD_BALANCE=off)
     (ADDRESS=(PROTOCOL=tcp)(HOST = oracle2.datacenter.staging)(PORT = 1521))(CONNECT_DATA=(SERVICE_NAME=orcl10STANDBY)))
     (CONNECT_DATA=(SERVICE_NAME=orcl10)))
tnsnames.ora (on both Primary and Standby DB's)
ORCL10 =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = oracle1.datacenter.staging)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl10)
ORCL10STANDBY =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = oracle2.datacenter.staging)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl10STANDBY)
listener.ora - Primary
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oracle\product\10.2.0\db_10)
(PROGRAM = extproc)
(SID_DESC =
(ORACLE_HOME = D:\oracle\product\10.2.0\db_10)
(SID_NAME = ORCL10)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = oracle1.datacenter.staging)(PORT = 1521))
listener.ora - Standby
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
(SID_DESC =
(ORACLE_HOME = D:\oracle\product\10.2.0\db_1)
(SID_NAME = ORCL10STANDBY)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = oracle2.datacenter.staging)(PORT = 1521))
)

Answer 1

Hi another way can be configuring client tnsname files to support failover:
EXAMPLE=
(description=
(address_list=
(load_balance=off)
(failover=on)
(address=(protocol=tcp)(host=X)(port=1521))
(address=(protocol=tcp)(host=Y)(port=1521)))
(connect_data=(service_name=XXX)))
if the listener on host X (primary db) fails, client tries to connect the standby database on host Y.