It seems to me that "radio" is the wrong word. The fact that the physical layer used by a subnet is "radio" says nothing about whether the network is reachable from the Internet. In fact, "radio" connectivity is what we should all be striving for!
Perhaps a different word to achieve the result you're after. I'm not a wordsmith. But perhaps: isolated, independent, separate, detached ... These would all require explanation. Isolated from what? Independent of what? So maybe something that's more self-explanatory of exactly what you're trying to identify: NoInternetAccess
Michael N6MEF
-----Original Message----- A subnet marked as "Radio" should use this flag exclusively and inherit the Tunnel or BGP flag from its parent network. For allocation only purposes only, a network without any flags is enough.
Rationale: A pure radio network doesn't exist from the point of view of ampr-net since it would not present any internet connectivity. If this connectivity is present, meaning it is reachable by any kind of means, IPIP or BGP routed, it will allow a connectivity method, the same as its parent network.