Loopback Interface

[ms419@freezone.co.uk]

I'm running a slave kerberos KDC on my OS X laptop. I need to access 
the KDC when the laptop is disconnected from any network, but the KDC 
doesn't bind to the loopback interface, and I can't seem to setup a 
dummy interface in OS X. OS X shuts down any interface on which it 
can't detect a link. How can I force the KDC to bind to the loopback 
interface?

Thanks,

Jack