How configure correctly Listener and TNSNAMES

Question

Hi to All,
This is my scenario.
Actually I have 2 machine under Linux, the SERVER01 and SERVER02.
1) On both is installed Oracle DB Version 9.2.0.4.0
2) On SERVER01 is installed Apache and PHP
3) On SERVER01 run an application PHP that use a DB located on the same server.
This is the LISTENER:
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = orcl)
      (ORACLE_HOME = /home/oracle/OraHome1)
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = server01.lan)(PORT = 1521))
      )and the TNSNAMES is
orcl =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = server01.lan)(PORT = 1521))
    (CONNECT_DATA =
      (SID = orcl)
)Now I need configure Listener and TNSNAMES in order to use with my Application on SERVER01 another DB (for example SID = MYDB2 and alias = MYDB2) located on SERVER02 (IP 192.168.99.98).
I have tried with this Listener and this TNSNAMES:
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = orcl)
      (ORACLE_HOME = /home/oracle/OraHome1)
    (SID_DESC =
      (SID_NAME = MYDB2)
      (ORACLE_HOME = /home/oracle/OraHome1)
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = web.server01.lan)(PORT = 1521))
        (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.99.98)(PORT = 1521))
  )But when I restart the listener this error is returned:
TNS-12545: Connect failed because target host or object does not exist
TNS-12560: TNS:protocol adapter error
TNS-00515: Connect failed because target host or object does not exist
Can someone help me to configure correctly the listener and resolve my problem ?
Thank You and best regards.
Gaetano

Answer 1

(ADDRESS = (PROTOCOL = TCP)(HOST = server01.lan)(PORT = 1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = server01.lan)(PORT = 1521))server01.lan doesn't look like a valid hostname to me. Were you able to ping to this hostname?