TNS-03505:Failed to resolve name in oracle 11g.

Question

i install oracle 11g client in my pc.i want to connect to the server i also used and install Toad Tools. i have server ip address.192.168.1.162 and userid and password and port number-1521
when i connect to the toad and its make error like that
ORA-12541TNS- no listener.
and this is my tnsnames.ora file ,
# tnsnames.ora Network Configuration File: E:\app\IT\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ERP =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = IT-PC)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = erp)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST =IT-PC)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
mlmdb =
     (DESCRIPTION =
     (ADDRESS_LIST =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.8.162)(PORT = 1521))
     (CONNECT_DATA =
     (SERVICE_NAME = mlmdb)
and i want to connect mlmdb from server.
and this is my listner.ora file
# listener.ora Network Configuration File: E:\app\IT\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = E:\app\IT\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\IT\product\11.2.0\dbhome_1\bin\oraclr11.dll")
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST =IT-PC)(PORT = 1521))
ADR_BASE_LISTENER = E:\app\IT
and this is my sqlnet.ora file
# sqlnet.ora Network Configuration File: E:\app\IT\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES, HOSTNAME)
when i connect form the run--cmd--tnsping mlmdb
its make error likes this
TNS-03505 : failed to resolve name ,
can anyone help me how can i find this solution
thanks in advance.

Answer 1

904803 wrote:
i install oracle 11g client in my pc.i want to connect to the server i also used and install Toad Tools. i have server ip address.192.168.1.162 and userid and password and port number-1521
when i connect to the toad and its make error like that
ORA-12541TNS- no listener.
and this is my tnsnames.ora file ,
# tnsnames.ora Network Configuration File: E:\app\IT\product\11.2.0\dbhome_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ERP =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = IT-PC)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = erp)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST =IT-PC)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
mlmdb =
     (DESCRIPTION =
     (ADDRESS_LIST =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.8.162)(PORT = 1521))
     (CONNECT_DATA =
     (SERVICE_NAME = mlmdb)
and i want to connect mlmdb from server.
and this is my listner.ora file
# listener.ora Network Configuration File: E:\app\IT\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = E:\app\IT\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\IT\product\11.2.0\dbhome_1\bin\oraclr11.dll")
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST =IT-PC)(PORT = 1521))
ADR_BASE_LISTENER = E:\app\IT
and this is my sqlnet.ora file
# sqlnet.ora Network Configuration File: E:\app\IT\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
# Generated by Oracle configuration tools.
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES, HOSTNAME)
when i connect form the run--cmd--tnsping mlmdb
its make error likes this
TNS-03505 : failed to resolve name ,
can anyone help me how can i find this solution
thanks in advance.looks like listener is not running on the database server you are trying to connect to *(ORA-12541TNS- no listener)*. even though you have configured both tnsnames and lisnterner.ora files, you have to start listener for clients to make connections to db. hope this helps. set your oracle home and then type as below. these commands are very simple and I don't think I need to explain them.
cmd> lsnrctl status
cmd> lsnrctl start
cmd> lsnrctl stop