Bridge should allow you to have the laser on one subnet while your primary network is on another subnet. This is true for more typical Ruida controllers as well since default IP for those are 10.0.3.3 with a subnet mask of 255.255.255.0. Most home or small office homes are not on a 10.0.3.xxx network.
Based on this other Topic it looks like default IP of Polar is 192.168.1.100.
Unfortunately this does’nt change the laser’s default ip address, which LBB needs by default to be 10.0.3.3. The only way to do this that I’m aware of is to use the external key pad that a Polar 350 does not have.
This is partially incorrect. Yes, the default IP is 10.0.3.3 but it isn’t needed to be. The page I linked to shows how to specify the IP address for which the laser is configured and for which the Bridge will try to communicate with. The Bridge has no problem connecting to lasers on a non-default IP.