How to add an entry to TNSNAMES.ORA?

Hello,
if I add the following entry to the TNSNAMES.ORA:
test1_10.121.34.56 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.34.56)(PORT = 1521))
(CONNECT_DATA =
(SID = test1)
(SERVER = DEDICATED)
how could I activate it please without rebooting?
I'm using Oracle 9i Release 9.2.0.8.0 at CentOS 4.7
Linux machine (which is compatible to RHEL 4.7).
Thank you
Alex

Hello all, thank you for your support.
Could we please start from the beginning?
(and I'll use the real IP addresses this time, sorry)
{color:#0000ff}oracle@ablora01:admin> host ablora01.internal.XXX.com
ablora01.internal.XXX.com has address 10.121.42.100
{color}
I have neither sqlnet.ora nor listener.ora and
I have the following 2 entries in my tnsnames.ora:
{color:#0000ff}oracle@ablora01:admin> ll /abl/apps/oracle/9.2/network/admin/
-rw-r--r-- 1 oracle oinstall 825 Jul 26 2003 libnk59.def
drwxr-xr-x 2 oracle oinstall 4096 Nov 5 16:25 samples
-rw-r--r-- 1 oracle oinstall 130 Mar 18 2002 shrept.lst
-rw-r--r-- 1 oracle oinstall 24 Aug 7 2000 snmp_ro.ora
-rw-r--r-- 1 oracle oinstall 717 Nov 5 17:15 sqlnet.log
-rw-r--r-- 1 oracle oinstall 756 Nov 5 17:08 tnsnames.ora
oracle@ablora01:admin> cat /abl/apps/oracle/9.2/network/admin/tnsnames.ora
# TNSNAMES.ORA Network Configuration File: /abl/apps/oracle/9.2/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
TEST1_10.121.42.81 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.81)(PORT = 1521))
(CONNECT_DATA =
(SID = test1)
(SERVER = DEDICATED)
BOCHUM_10.121.42.100 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.100)(PORT = 1521))
(CONNECT_DATA =
(SID = BOCHUM)
(SERVER = DEDICATED)
{color}
When I try to tnsping the first entry it works:
{color:#339966}oracle@ablora01:admin> tnsping BOCHUM_10.121.42.100
TNS Ping Utility for Linux: Version 9.2.0.8.0 - Production on 05-NOV-2008 17:19:34
Copyright (c) 1997, 2006, Oracle Corporation. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.100)(PORT = 1521))) (CONNECT_DATA = (SID = BOCHUM) (SERVER = DEDICATED)))
OK (0 msec)
{color}
When I try to tnsping the 2nd entry it fails:
{color:#ff0000}oracle@ablora01:admin> tnsping TEST1_10.121.42.81
TNS Ping Utility for Linux: Version 9.2.0.8.0 - Production on 05-NOV-2008 17:20:21
Copyright (c) 1997, 2006, Oracle Corporation. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 10.121.42.81)(PORT = 1521))) (CONNECT_DATA = (SID = test1) (SERVER = DEDICATED)))
TNS-12541: TNS:no listener{color}
When I look at the listener I get:
{color:#339966}oracle@ablora01:admin> lsnrctl status
LSNRCTL for Linux: Version 9.2.0.8.0 - Production on 05-NOV-2008 17:21:55
Copyright (c) 1991, 2006, Oracle Corporation. All rights reserved.
Connecting to (ADDRESS=(PROTOCOL=tcp)(PORT=1521))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 9.2.0.8.0 - Production
Start Date 04-NOV-2008 17:35:04
Uptime 0 days 23 hr. 46 min. 50 sec
Trace Level off
Security OFF
SNMP OFF
Listener Log File /abl/apps/oracle/9.2/network/log/listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ablora01.internal.XXX.com)(PORT=1521)))
Services Summary...
Service "BOCHUM" has 1 instance(s).
Instance "BOCHUM", status READY, has 1 handler(s) for this service...
Service "test1" has 1 instance(s).
Instance "test1", status READY, has 1 handler(s) for this service...
Service "test1XDB" has 1 instance(s).
Instance "test1", status READY, has 1 handler(s) for this service...
The command completed successfully{color}
When I try sqlnet it first fails and I have to reenter password:
{color:#339966}{color:#ff0000}oracle@ablora01:admin> sqlplus scott/tiger@TEST1_10.121.42.81
SQL*Plus: Release 9.2.0.8.0 - Production on Wed Nov 5 17:10:42 2008
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
{color:#ff0000}ERROR:
{color}{color:#ff0000}ORA-12541: TNS:no listener
{color}{color}
{color:#ff0000}{color:#ff0000}Enter user-name: scott
Enter password:{color}
Connected to:
Oracle9i Release 9.2.0.8.0 - Production
JServer Release 9.2.0.8.0 - Production
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
BONUS TABLE
DEPT TABLE
EMP TABLE
SALGRADE TABLE
{color}
Do you please know, why it complains about the missing listener?
And my actual target is to allow a program from 10.121.42.81
to connect to the "test1" instance.
Regards
Alex
Edited by: user10507116 on Nov 5, 2008 12:29 PM

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