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Comment by yjftsjthsd-h | Hacker News Reader

> I spent a WEEK without IPv4 to understand IPv6 transition mechanisms

> NAT64 - the method I’ve setup for this test

> IPv6 is absolutely ready for prime-time and has been for awhile

So... No, you spent a week effectively using both v6 and v4 with extra steps. If someone said "Linux is ready for primetime" but their setup only worked because they ran a bunch of applications in a Windows VM, I'd call that strong evidence that it really wasn't. Same here.

That said... This is from early 2023. Any chance it's better now?

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> That said... This is from early 2023. Any chance it's better now?

I accidentally went IPv6 only on my home wifi for a few weeks a while ago. I only noticed when GitHub didn't load (I avoid work things at home, hence accessing GitHub being rare.)

Relatedly, fuck GitHub and their incompetence at rolling out IPv6. It's nothing other than that at this point. Blank, unadulterated incompetence.

> No, you spent a week effectively using both v6 and v4 with extra steps.

It's less steps though. You can do all your network setup in the nice v6 world, and set up v4 emulation for those who need it. Yes, it's not yet practical to turn of v4 entirely, just like it's not yet practical to turn off Rosetta on your ARM mac.

My former colleague Marco Davids from SIDN Labs (the R&D department at the .nl TLD operator) did an experiment in 2021 where he actively disabled IPv4 support on all components in his test network, even disabling the complete IPv4 stack in the FreeBSD kernel (not possible on Linux, at least not at the time). So far, his test is the only thing I know of that came close to an authentic simulation of an IPv6-only world.

https://www.sidnlabs.nl/en/news-and-blogs/can-we-do-without-...

AAAA record resolution is the real bottleneck for adoption. Once you have dual stack working, I did a real-world, simple test: Release your ISP IPv4 DHCP lease on the router (kill udhcpc) and flush DNS on your hosts. Now all public DNS lookups must resolve to a IPv6 domain. You will very quickly find many domains on the Internet still don't have AAAA records. Lots of popular services will simply fail to resolve their hard coded domains. QED.

https://whynoipv6.com/

None of the ISPs where I live provide NAT64 gateways. Exactly one advertised it, I signed up almost a year ago and they still haven't enabled it for me yet (I think they don't actually offer it and just forgot to remove the page).

No, because unfortunately the need for v4 hasn’t changed. In other words many sites and parts of the internet remain only on v4.

Until nearly everything is on v6 too it won’t be realistic to ditch the mechanisms that provide v4 access.

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