On Tue, Mar 8, 2022 at 12:34 PM John Levine <johnl@iecc.com> wrote:
FWIW, I also don't think that repurposing 240/4 is a good idea. To be useful it would require that every host on the Internet update its network stack,
Hi John, That's incorrect and obviously so. While repurposing 240/4 as general purpose Internet addresses might require that level of effort, other uses such as local LAN addressing would only require the equipment on that one lan to be updated -- a much more attainable goal. Reallocating 240/4 as unpurposed unicast address space would allow some standards-compliant uses to become practical before others. A few quite quickly.
which would take on the order of a decade, to free up some space that would likely be depleted in a year or two. It's basically the same amount of work as getting everything to work on IPv6.
Is it not past time we admit that we have no real idea what the schedule or level of effort will be for making IPv6 ubiquitous? This year it was more than last year and next year it'll probably be more than this year. The more precise predictions all seem to have fallen flat. Regards, Bill Herrin -- William Herrin bill@herrin.us https://bill.herrin.us/