Installing the Portal and Forms Middle Tier

If you are going to install the midtier on the same server as the infrastructure then there is no configuration change required.  Unlike previous versions that required you to shutdown the Enterprise Manager web site, Application Server 10g installs over the fully running infrastructure.  In fact, provided that the infrastructure installation was successful, you can exit the installer and immediately restart it for the next installation. 

If you are installing the midtier on a separate server (recommended) you must ensure that the OS is configured and is able to communicate with the infrastructure server.  Any mid-tier installation that includes components above the J2EE and Web Cache must be able to communicate with an infrastructure tier or the installation will fail. 

Before starting the midtier installation, open a browser and navigate to the instance status page shown in Figure 3-17.  Notice the link at the top of the page labeled Ports.  Select the Ports link to get a list of the ports used by the infrastructure, Figure 3-18.

Figure 18: Infrastructure Port Page of the Application Server Control

Note the Oracle Internet Directory non-SSL port number, in this case 389.  The installer tries to use the standard LDAP port 389 (non-SSL) and 636 (SSL).  If you did not remove those ports from the /etc/services file, OUI will have installed it to another open port.   The ports are also listed in the $ORACLE_HOME/install/portlist.ini file.  You will need to know the OID ports during the midteir installation. 


Read more here:

http://www.dba-oracle.com/application_server/t_app_server_midtier.htm 

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