@IOT_Noob
I don’t think they explicitly want to exclude IPv4.
The idea of the consortium is to reuse things which are already existing.
Most of the standards of the past years for IP in IoT are targeting IPv6.
If you look at BLE, there is a proposal for IPv6 over BLE (https://tools.ietf.org/html/rfc7668), not IPv4.
Zigbee, as well as Thread, are based on 802.15.4.
There is an IPv6 Layer on top of 802.15.4 called 6LoWPAN, which is used by Thread.
Adding IPv4 support to all of this would result in a lot of effort with almost no gain from a technical perspective.
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