[Simh] SIMH - Network loopback?

[Paul Hardy 2]

I have a Windows XP laptop running a SIMH VAX emulation with VMS. I have 
Cygwin installed on the host, and use it as a DECWindows X-Terminal, so that 
it looks very like a VAXstation (but more portable!).

All works fine when I'm plugged into my home network. However if I want to 
take the laptop on my travels and unplug the ethernet, communication between 
the Windows host and the SIMH VMS stops. Presumably it is relying on the 
ethernet switch upstream to loopback the packets from VMS to Windows.

Other than carrying round a physical Ethernet switch, is there any software 
solution to this? Perhaps something similar to the Microsoft loopback driver 
that I have used in the past to connect to a Virtual PC running another copy 
of Windows.

Any ideas?

-- 
Paul  Hardy
Email: paul at the paulhardy dot net domain