Comment by tom_alexander
Comment by tom_alexander 13 hours ago
> not enough v4 IPs
No one is giving their IoT devices public IPv4 addresses. They would be behind a NAT. RFC 1918 provides 17,891,322 usable IP addresses for each private network. If we want to be a little more adventurous, RFC 6598 provides an additional 4,194,302 usable addresses and 240.0.0.0/4 is another 268,435,454 usable addresses "reserved for future use" since 1989, but still sitting unused so we can use them as internal addresses inside a NAT anyway (for example, AWS uses this range internally).
Show me a network that is using all 290,521,078 addresses and I'll show you a network managed by a team of network engineers who can just set up IPv6.
You still have to manage those and assign them through DHCP every time the device wakes up and turns the radio on. Maybe WiFi 7 will address that with the low power mode? Also, I don't want a 100 sensor mesh network on my LAN. That's why Thread uses a IPv6 6LoWPAN. One should use that if they want to bridge to IP.