Hi Andrew, On 03.08.21 21:11, Andrew Sullivan wrote:
On Tue, Aug 03, 2021 at 02:43:10AM -0700, John Gilmore wrote:lowest-address draft is the first of a set of upcoming drafts that propose small, easy improvements in IPv4.I think I recalled an (int area?) meeting something like a decade ago where there was a pretty strong sense of consensus that the right thing for the IETF to do is to stop fiddling with IPv4 and to make the path to v6 easier.
Dave Meyer, Vince Fuller, and I were the co-authors of that work that was presented here at the int-area. We dropped the idea because there were some serious concerns about undefined behaviors in endpoints that would not expect to see packets with those addresses. If memory serves, Dave Thaler raised those issues, and referred to CPEs and firewalls in particular.
The part of the logic that ran *for* using this address space was that it would show appropriate stewardship, by being as efficient as possible. Since then, IPv6 adoption is way up, and so are IPv4 prices; which is why this proposal is so interesting now. That doesn't invalidate your logic, but it's not why we dropped the proposal.
Eliot
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