Running SUM on an isolated server

Hello,

We have a virtual environment for our SAP systems.  As part of this I'm wanting to upgrade a system but prior to 'doing it for real' I wanted to run through SUM on the server so our network team has provided me with a clone that has no network connection, so it can't talk to any other systems and update anything it shouldn't.

I ran SUM up (SP16) but it won't get any further than the step Common System Detect where it says:

java.lang.Exception: No network addresses detected

My question is.  Is it possible to get SUM to work in this situation ?

Thanks,

Daniel