Re: IPv4 flag day

[Tom Beecher via NANOG <nanog () lists nanog org>]

> In practice I'm thinking about something where relevant players all
> sign an agreement to drop ipv4 at their edge in e..g 15 or 20 years.


There's no guarantee that those who are 'relevant' now will also be 15+
years from now. So this will have no practical effect.

It's still seen as cheaper to use the wrong technical solutions to avoid
V6, and have it be 'good enough', than it is to actually deploy it
correctly. Unless this ever changes, the status quo will persist.

On Tue, Jun 16, 2026 at 2:34 AM Saku Ytti via NANOG <nanog () lists nanog org>
wrote:

> 'ello,
>
> I've babbled about this before, but apparently I'm babbling about it again.
>
> Does anyone feel responsibility for the dual stack mess we've created?
> It wasn't here when we found the Internet, and we're going to leave it
> here after we leave, does not really jive with the whole leave
> campground cleaner than found it ethos.
>
> I don't see any future where organically IPv4 dies in such a way that
> people offering services on the Internet are comfortable offering them
> IPv6 only, the long tail will be too expensive to ignore.
>
> Dual stack adds complexity, cost, reduces quality and security. It is
> also blatantly an antitrust issue, as established players with access
> to large allocations can outcompete new entrants with no IPv4
> allocation.
>
> In practice I'm thinking about something where relevant players all
> sign an agreement to drop ipv4 at their edge in e..g 15 or 20 years.
> Creating clear business justification for people to implement IPv6 in
> their next upgrade cycle. Today if I'm an edge with the IPv4 addresses
> I need, I wouldn't consider IPv6, because that's just a cost to me,
> with no upside.
> I know I could get some transit shops to sign off on such an
> agreement, but no one cares about transit, this obviously doesn't work
> without Amazon and Facebook et.al.
>
> Sure edges still can have IPv4, but that's like edge having IPX or
> AppleTalk, it'll be highly local issue, no one expects to reach
> anywhere with it, and anticipates to translate 100% of external
> traffic.
>
> Amazon? Facebook? Google? Microsoft? Any appetite?
>
> --
>   ++ytti
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