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points by matja 13 hours ago | 0 comments
Depends on the application, a web-browser that implements Happy Eyeballs protocol may prefer IPv4 if the IPv6 latency is higher.
[–] nomel 9 hours ago
I know little of this. How/why could one be higher latency over the other?
[–] winstonwinston 7 hours ago
Different paths. If you’ve got a “dual stack” on your computer, give it a try.

tracert -4 google.com

tracert -6 google.com

I do get very different hops and latency.

However for “happy eyeballs” algo to fallback to IPv4, latency needs to be very bad on IPv6.

[–] bombcar 1 hour ago
Happy eyeballs is more to fix totally broke ipv6 than speed differential.

For many years and even how there are networks that advertise they can do ipv6 and hand out real addresses but nothing works.