To configure the database service for virtual network name

1. If the file tnsnames.ora does not contain entries for Database Service and Network Name, then create these entries using the Net Configuration Assistant. You must create these entries on all the cluster nodes.

2. Associate the database with the listener.

   • Ensure that the initialization parameter file contains the following entries:

     • SERVICE_NAMES (the name of the database service)

     • INSTANCE_NAME (the name of the database instance)

     Example SQL queries to ensure these entries:

     show parameter INSTANCE_NAME
     show parameter SERVICE_NAME

     These parameters are created during installation or database creation.

   • Use one of the following ways to configure the new attribute listener_alias:

     Run the following SQL command:

     SQL> ALTER SYSTEM SET LOCAL_LISTENER='<listener_alias>' 
     scope=spfile;

     or

     Add the following entry to the initialization parameter file (pfile/spfile):

     LOCAL_LISTENER = <listener_alias>

   • Define the parameter listener_alias. If your Oracle configuration uses the file tnsnames.ora, edit the file as instructed below. The default location of tnsnames.ora is <ORACLE_HOME>\NETWORK\ADMIN.

     Add the following to tnsnames.ora file:

     <listener_alias>=

     (DESCRIPTION = (ADDRESS=(Protocol=TCP)(HOST=virtual_name)(Port=default port)))

     The listener_alias parameter gets appended by the default domain name specified in the file sqlnet.ora.

   • Take the listener service and the database service resources offline, and then bring them online.

3. Edit the initialization parameter file. For the dispatchers parameter, replace the virtual IP address with virtual name for dispatchers.

   If you use PFILE

   Edit the dispatchers parameter by adding or editing the HOST parameter. The edited dispatchers parameter should look like:

   dispatchers = '(ADDRESS=(Protocol=TCP)
   (HOST=virtual_name) (other entries))'

   Here virtual_name is the name of the Lanman resource.

   If you use SPFILE

   Log on to the Oracle database as administrator and edit the dispatchers parameter by adding or editing the HOST parameter.

   Type the following commands on the command prompt:

   C:\>sqlplus "/as sysdba"
   C:\>alter system set dispatchers = 
   '(ADDRESS=(Protocol=TCP)(HOST=virtual_name)(other 
   entries))' scope=spfile;

   Here virtual_name is the name of the Lanman resource.