Damn, I didn’t know devices do these dynamic MACs, but yeah it’s not a trusted field to begin with.

By IPP autodiscovery, do you mean mDNS? If so, does the router needs to install avahi as well for single-network discovery to work? Or just the client?

Avahi on the router for multi VLAN discovery seem to be a nice idea, I’ll look into it and maybe try to hook it up to solution 2. I’ve thought users could just manually input the IP addresses (and the non-tech users will just simply be onboarded by me anyways), but having it advertised by default may just be less of a hassle for them.