Can I add more than one Managed Server / Admin server on the same host ? Enterprise Edition will allow you to view all data. But to make configurations, you will need to go to the Managed Server console. Since a web browser sets cookies based on the <hostname> used to access the server, accessing another J2EE application on the same server will reset the session of the other.
Hence, you will need to use a work around while adding Managed Servers to the Admin Server, by way of specifying a unique IP or host name. Thus you can do this by creating multiple host names / IP address for the same server.
Eg: Assume you have a server with the name app-server with IP address 192.168.1.30. In this case, you will be able to login to only 2 consoles simultaneously and that too by accessing the servers as : http://app-server/ and http://192.168.1.30/.
Note : The additional aliases are required to allow you to view the Admin Server WebConsole and Managed Server Console simultaneously in the same browser. This limitation occurs because of the J2EE spec that mandates J2EE authorization session cookies need to be named "JSESSIONID". Hence creating multiple aliases to the same server like admin-app, ms1-app, ms2-app will be the work around for this limitation