On the Microsoft Windows machine that will host vCenter Server, open the Microsoft ODBC Administrator utility by selecting Start > Run and entering odbcad32.exe.
Enter a name for the DSN (for example, VCDB2_remote) and click Add.
On the TCP/IP tab of the CLI/ODBC settings dialog box, configure the database values.
Database name: The default value is vcdb.
Database alias: The database alias can be the same as the database name.
Host name: Enter the fully qualified domain name or IP address of your data server.
Port number: To determine the correct port number, look up the dbm cfg SVCENAME parameter and its associated port number in the file C:\Microsoft Windows\system32\drivers\etc\services on Windows, or in the/etc/servicesfile on UNIX and Linux.