At 11:18 PM +0200 24/5/14, Hans Vlems wrote: The DIX spec says that hardware addresses ( the ones you put in the simh configuration file starting with 08-00-2B) must be unique . I put no address in my simh conf file. I tried to change it to -AA-BB-01 as you suggested above. I have now lost ssh access to my emulator and figure how to clear my ARP cache (arp -d -a wont 't do it under OS X). -- Jean-Yves Bernier