There's no requirement that the mesh be IP-based or function as a layer-3 router...
Even if it were IP-bsaed, it would be extremely straightforward for one box to send a UDP message to another, and receive and retransmit at the application layer. No TTL nonsense, No multiple IPs showing up communicating upstream.
Even if it were IP-bsaed, it would be extremely straightforward for one box to send a UDP message to another, and receive and retransmit at the application layer. No TTL nonsense, No multiple IPs showing up communicating upstream.