You could assign your devices IPs from fc00::/7 range otherwise known as "Unique local unicast"[1], which is the IPv6 version of 10/8, 192.168/16 and the like.

You could assign your devices IPs from fc00::/7 range otherwise known as "Unique local unicast"[1], which is the IPv6 version of 10/8, 192.168/16 and the like. [1] https://en.wikipedia.org/wiki/Unique_local_address https://en.wikipedia.org/wiki/Unique_local_address