I am new to Siebel CRM.
I have a simple question, I can't find a direct answer in the deployment Guide on one server only. Can I install a full lab on one server only?
I have tried so, but after installing the Enterprise Server, I loose Gateway name server connection and also database connection.
The simple answer is yes.
You can also check the following document on Supportweb:
Siebel 8.0 Simplified Demonstration Installation Tasks for Windows (Doc ID 475438.1)
Or you can go through the logs and check the exact error.