Hey guys, I have an unusual situation where the easiest solution is to limit a specific device on my network to IPv6 only. I cannot disable IPv4 on the device itself because it's configured by my employer. I can't simply block IPv4 traffic to that device because it will think it doesn't have internet access and will throw a hissy fit. The easiest solution really seems to be to simply not assign it an IPv4 address. So I'm looking at either limiting the v4 DHCP to a set of ports, or just disabling it completely on the router. I did a test-run of only IPv6 on a personal machine for a few days without issue, so I'm not worried about giving up IPv4 - I just want to do whatever is simplest.

Any suggestions on how I could do this, or pointers for where I should look for more information?

Figured it out, I checked the IPv4 leases for the mac address of the device, converted the lease to static, and blocked the lease! IPv6 works on the device just as it should.