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this post was submitted on 24 Jun 2024
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I had network speed issues and the solution was literally to disable ipv6... Fiber 1gbit network still had issues. https://www.reddit.com/r/youtube/comments/owbjdl/anyone_else_getting_buffering_when_using_ipv6/
This has nothing to do with IPv6 itself. I pull in 4K YouTube videos over IPv6 just fine. My IPv6 routes actually have lower latency than my IPv4 routes, funnily enough.
Sounds like your ISP has broken their IPv6 routes, or your modem is outdated and can't do IPv6 hardware acceleration. Disabling IPv6 to downgrade your connection will work as a workaround, at least until your ISP switches over to something using IPv6 as the connection backbone (like DS-Lite, which would allow your ISP to significantly reduce their IPv4 space and make a quick profit selling off their allocations, which is unfortunately becoming more and more common).
Your ISP or modem manufacturer needs to fix the actual problem here.
4k was fine until I tried watching 8k 60fps HDR on YouTube, disabling IPv6 fixed it. It was weird because speedtest and torrents were completely fine using full bandwidth, just YouTube needed me to disable ipv6
Weird. Ipv6 and YouTube stats for nerds shows between 140mbit and 600mbit depending on what's being watched and the time of day.
Is it possible your isp has problems with their ipv6 setup?
IPv6 overheads should only have a marginal impact on max speeds.
I’ve heard of all sorts of issues with my fiber ISP (Verizon Fios) rolling out IPv6. It’s been years that they’ve been slowly rolling it out for testing in a few places. There’s virtually no useful documentation on their website about it. And it’s still not available where I am.