Here is one way to do it:
- System A would have the IPs 10.11.11.10 & 10.22.22.10.
- System B would have the IPs 10.22.22.20 & 10.33.33.20.
- System C would have the IPs 10.33.33.30 & 10.11.11.30.
The netmask for all these interfaces would be set to 255.255.255.0 (/24).
None of those network interfaces would have a gateway defined (Windows can only have one gateway defined). I’m assuming all three PCs will have some kind of general internet access for updates and whatnot.
Additionally, to make life easier: