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this post was submitted on 29 Jun 2026
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That's not how header backward compatibility works. IPv4 routers would discard the packet, not prepend zeroes.
it would obviously involve code updates for compability, and I don't pretend to know how it would work long term, but it makes the most sense.. By prepending the zeros, you expand the number of networks dramatically.
I would guess that no matter what, everything gets an upgrade... But I think this might make it more seamless.
Everyone seems to think that IPv6 is a complicated solution to a simple problem, it's not. If you want to learn more, I managed to track down an article I read a while ago from one of the original IPng engineers. https://github.com/becarpenter/book6/blob/main/01.%20Introduction%20and%20Foreword/Why%20IPv6%20is%20so%20complicated.md
we both thought of the same article haha