I have a Mac (hermione, IP 192.168.2.86) that runs a Virtualbox VM with address 192.168.97.1.
netstat -rn on that machine says:
192.168.97 link#23 UC 2 0 vboxnet ! 192.168.97.1 a:0:27:0:0:2 UHLWI 0 4 lo0 192.168.97.100 8:0:27:f0:e0:3e UHLWIi 1 2 vboxnet 961
When I'm on that Mac, everything is fine, I can ping 192.168.97.1 (VirtuaBbox itself) and 192.168.1.100 (the VM).
Now, I want to be able to reach these from the outside. So on another Mac (luna) I've tried setting up routes to do that, e.g.
sudo route -v -t add -net 192.168.97 192.168.2.86
sudo route -v add -host 192.168.97.1 192.168.2.86
Telling luna to route traffic for 192.168.97.1 to 192.168.2.86 (the IP address of hermione).
But traffic won't get through. Is macOS capable of this at all and if so, what am I doing wrong?