oracle modify ip

After the Oracle database is running, its listener will use the IP address stored in the configuration file by default to determine the connection with the client. When you need to change Oracle's IP address, you need to modify the configuration file to ensure that the listener can correctly bind to the new IP address. In this article, we will discuss how to modify the IP address in the Oracle database.

Step 1: Determine the IP address that needs to be changed

First, you need to determine the IP address that needs to be changed. You can view the IP address configured in the current system by running the following command.

ifconfig

This command will return the information of the network cards in the system, including the IP address of each network card. Record the IP address of the network card that needs to be changed, this will be used in the next step.

Step 2: Edit the Oracle configuration file

Oracle’s configuration file is located in the $ORACLE_HOME/network/admin directory. In this directory, there may be multiple configuration files, but only the listener.ora file needs to be edited. Open the file using vim or another text editor.

vim $ORACLE_HOME/network/admin/listener.ora

The file should include the following content:

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))
    )
  )

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/12.2.0/dbhome_1)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = orcl)
      (ORACLE_HOME = /u01/app/oracle/product/12.2.0/dbhome_1)
      (SID_NAME = orcl)
    )
  )

In this file, the HOST field needs to be changed to the new ip address.

Step 3: Restart the Oracle listener

After modifying the listener.ora file, you need to restart the Oracle listener so that it uses the new IP address. You can enter the following command in the terminal to restart the listener.

lsnrctl stop
lsnrctl start

At this point, the listener has been restarted and bound to the new IP address. You can check the status of the listener by running the following command.

lsnrctl status

This command will return the status information of the database listener, which should include the new ip address.

At this point, the IP address of the Oracle database has been successfully modified. After changing the IP address, the connection should be retested through the application to ensure it is working properly.

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