4 ms·

Every couple of months, I enable dual-stack on my home network, to see if it works. And inevitably I get a terrible experience. Some sites fail to load, other

Every couple of months, I enable dual-stack on my home network, to see if it works. And inevitably I get a terrible experience. Some sites fail to load, others load after a huge delay (presumably because we're waiting for an ip6 timeout of some sort) and some things just don't work right. I'm always too lazy to figure out why these things don't work, but I turn off dual stack and everything works fine again. I'm a network engineer and I can't make ip6 work seamlessly in my house -- what chance do regular consumers have?

deathanatos 4y ago
Your experience, and your home network, is absolutely exceptional then. > what chance do regular consumers have? Clearly, quite a good deal, since dual-stack is the default. Nearly half the Internet[1] is using IPv6 using dual-stack just fine, and the other half is using dual stack with a LL v6 because their ISP sucks. Like many others, my laptop routinely travels, and visits a variety of dual-stack and IPv4 only networks, just as VRBO rentals, café WiFi, airports, etc. I've never had an issue connecting to those networks that case caused by dual-stack. Far more often do some form of captive portals (from misconfigured DHCP servers to MitMs wreaking havoc) cause more failures. > others load after a huge delay (presumably because we're waiting for an ip6 timeout of some sort) This isn't how v6 works. It isn't impossible that there's some site out there somewhere with a broken AAAA record, but again, it is the exception given the amount of Internet-connected dual stacks. Most v4-only sites aren't going to have a AAAA. [1]: https://www.google.com/intl/en/ipv6/statistics.html https://www.google.com/intl/en/ipv6/statistics.html
- tumetab1 4y ago
  > Your experience, and your home network, is absolutely exceptional then. Actually, it's not. Just check google for "ipv6 slow internet" and check it's not exceptional. It's normal because many sites/games/software isn't that tested/optimized for IPv6. Even the basic step of having setup Google/Cloudflare DNS for you forget that you have not set it up for IPv6 might make your experience of IPv6 really bad.
Dagger2 4y ago
That sounds like pMTUd failure. The easiest check for that would be to set your client machine's MTU to 1280 and see if it fixes it. Most people work around that problem with TCP MSS clamping in v4. Sometimes they don't apply the workaround for v6, then blame v6 for the problems.
Avamander 4y ago
I think regular consumers have more ordinary setups and those work totally fine in a lot of places. That aside, out of interest I blocked outgoing port 80, now that is fun. So many things break in weird and bizarre ways. It's also interesting to see how many things are potentially vulnerable to eavesdropping.

deathanatos 4y ago

Your experience, and your home network, is absolutely exceptional then. > what chance do regular consumers have? Clearly, quite a good deal, since dual-stack is the default. Nearly half the Internet[1] is using IPv6 using dual-stack just fine, and the other half is using dual stack with a LL v6 because their ISP sucks. Like many others, my laptop routinely travels, and visits a variety of dual-stack and IPv4 only networks, just as VRBO rentals, café WiFi, airports, etc. I've never had an issue connecting to those networks that case caused by dual-stack. Far more often do some form of captive portals (from misconfigured DHCP servers to MitMs wreaking havoc) cause more failures. > others load after a huge delay (presumably because we're waiting for an ip6 timeout of some sort) This isn't how v6 works. It isn't impossible that there's some site out there somewhere with a broken AAAA record, but again, it is the exception given the amount of Internet-connected dual stacks. Most v4-only sites aren't going to have a AAAA. [1]: https://www.google.com/intl/en/ipv6/statistics.html https://www.google.com/intl/en/ipv6/statistics.html

tumetab1 4y ago
> Your experience, and your home network, is absolutely exceptional then. Actually, it's not. Just check google for "ipv6 slow internet" and check it's not exceptional. It's normal because many sites/games/software isn't that tested/optimized for IPv6. Even the basic step of having setup Google/Cloudflare DNS for you forget that you have not set it up for IPv6 might make your experience of IPv6 really bad.

Dagger2 4y ago

That sounds like pMTUd failure. The easiest check for that would be to set your client machine's MTU to 1280 and see if it fixes it. Most people work around that problem with TCP MSS clamping in v4. Sometimes they don't apply the workaround for v6, then blame v6 for the problems.

Avamander 4y ago

I think regular consumers have more ordinary setups and those work totally fine in a lot of places. That aside, out of interest I blocked outgoing port 80, now that is fun. So many things break in weird and bizarre ways. It's also interesting to see how many things are potentially vulnerable to eavesdropping.