Trying to run two Stellarmate devices (eg SM1 and SM2) on same Mac laptop (controlling 2 telescopes).  I can do this  at home with a router, and running two separate KStar sessions, but I currently do NOT have router.
Trying to set this up with direct ethernet cables from laptop to each SM device, but I cannot get both running at the same time.   When I establish ethernet connection to one of the devices, then I can no longer reach the other device.   Any advice would be greatly appreciated. 
  I assume I may need to change address for one of the SM boxes, I'm not really sure, and maybe there is a easier way to do it.