DB Link between RAC and a standalone Database - HELP

Question

Hi Guys,
I have a database DB1 on server1 (192.168.100.10), and then I have a RAC database on physical servers PROD1 192.168.100.1, and PROD2 192.168.100.5 with a load balancer. These two have virtual IPs 192.168.100.2 and 192.168.100.6. I have managed to create a DB Link on the RAC db pointing to DB1 with success, but when I create a db link on the DB1 server pointing to the RAC it fails. TNSPING works fine if I refer to the physical IP, but when I try the virtual IP it fails, but once I logon to the database I fail to connect using a db link or conn user1@prod1_link. Below are my tnsnames.ora entries.
#virtual IPs
PROD=
(DESCRIPTION=
(ADDRESS_LIST=
(LOAD_BALANCE=YES)
(FAILOVER=YES)
(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.2)(PORT=1529))
(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.6)(PORT=1529))
(CONNECT_DATA=
(SERVICE_NAME=PROD)
PROD1=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.2)(PORT=1529))
(CONNECT_DATA=
(SERVICE_NAME=PROD)
(INSTANCE_NAME=PROD1)
PROD2=
(DESCRIPTION=
(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.6)(PORT=1529))
(CONNECT_DATA=
(SERVICE_NAME=PROD.econet.co.zw)
(INSTANCE_NAME=PROD2)
#physical IPs
P1_PROD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.1)(PORT = 1529))
(CONNECT_DATA =
(SID=PROD)
(INSTANCE_NAME=PROD1)
P2_PROD =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.5)(PORT = 1529))
(CONNECT_DATA =
(SID=PROD)
(INSTANCE_NAME=PROD1)
oracle@server1> tnsping prod1
TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 12-OCT-2010 11:52:06
Copyright (c) 1997, 2009, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.100.2)(PORT=1529)) (CONNECT_DATA= (SERVICE_NAME=PROD) (INSTANCE_NAME=PROD1)))
TNS-12541: TNS:no listener
oracle@server1>
oracle@server1>
oracle@server1> tnsping p1_prod
TNS Ping Utility for Linux: Version 11.2.0.1.0 - Production on 12-OCT-2010 11:09:28
Copyright (c) 1997, 2009, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.100.1)(PORT = 1529))) (CONNECT_DATA = (SID=PROD) (INSTANCE_NAME=PROD1)))
OK (0 msec)
oracle@server1>
SQL> Create Database Link prod_link
Connect to user1
identified by password
using 'P1_PROD';
Database link created.
SQL>
SQL> select * from global_name@prod_link;
select * from global_name@prod_link
ERROR at line 1:
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
SQL>
Help... sorry I could format the above using the "code" text.
Regards,
Kevin
Edited by: Kevin Honde on Oct 12, 2010 12:10 PM

Answer 1

TSTRAC1 =
(DESCRIPTION=
(LOAD_BALANCE=OFF)(FAILOVER=ON)
(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.96.165)(PORT=1521))
(ADDRESS=(PROTOCOL=TCP)(HOST=10.10.96.167)(PORT=1521))
(CONNECT_DATA=(SID=TSTRAC1)
(INSTANCE_ROLE=PRIMARY)
(SERVER=DEDICATED)
(FAILOVER_MODE=
(BACKUP=TSTRAC2)
(TYPE=SESSION)(METHOD=BASIC)
(RETRIES=10)(DELAY=3))))
TSTRAC2 =
(DESCRIPTION =
(LOAD_BALANCE = OFF)(FAILOVER = ON)
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.96.167)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.96.165)(PORT = 1521))
(CONNECT_DATA = (SID = TSTRAC2)
(SERVER = DEDICATED)
(FAILOVER_MODE =
(TYPE = SESSION)(METHOD = BASIC)
(RETRIES = 180)(DELAY = 5))))
-- 10.10.96.165 VIP of node 1
-- 10.10.96.167 VIO of node 2
This is the TNS entry for one of RAC DB. You can change accordingly. Then first try to log in to the RAC db from your single instance database. If you can connect successfully then you can create the DB LINK easily.
Regards
Asif Kabir