Hog PC to Hog Pc widget backup

Hi All
just a quick one
I have 2 hog pc setups one with a nano and one just a laptop with a single widget
if I network these together is there a way of using each others dmx outs on universe one and run it as a back up situation????
I thought I read if you give the internal DP's different numbers they will swap over on fail???
and before you say it yes I have scoured the manual ,maybe im blind
Mikey