I run a large multi-campus network. At least 75% of our outgoing Internet traffic is IPv6. Looking at home ISPs accessing our services, it’s at least the majority of them coming in on IPv6. My guess is it’s a similar ratio as outgoing.
> At least 75% of our outgoing Internet traffic is IPv6
One question I have about this statistic (and also about Google's IPv6 statistic) is, does traffic mean raw bytes? And in that case, is this just a reflection that like 75% of all internet traffic is just YouTube and Netflix due to video being a bandwidth hog?
(I'm a huge proponent of IPv6 - I just wish we had more useful statistics!)
The GP's statistic is probably raw bytes, and yes, a significant chunk of that will be the big video streaming sites, which mostly have v6. That's still a useful statistic, because part of the cost of v4 is NAT and NAT capacity is measured in terms of number of packets.
I guess you're thinking that the number of v4-only websites is much higher than the traffic numbers represent -- which is true but that's actually fine because v6-only clients can still reach those sites easily via NAT64, so having a lot of v4-only websites isn't blocking deployment of v6 or undeployment of v4. The only real problem it causes is that people use it as an excuse to not do v6...
As for Google's stats, they're probably percentage of either connections or users as measured by their frontend load balancers.
Unfortunately in my country (Italy) our major provider (TIM) is not handing out IPv6 addresses to users. Other providers do, for the fact that nowadays IPv4 addresises are expensive and thus they no longer provide a public address. One of them (Iliad) is IPv6 only, and the IPv4 traffic is tunneled into IPv6 at the router level.
I think the only way that we will move to IPv6 is a law (probably from the EU) that imposes to every provider to give its consumers an IPv6 address.
IPv6 has issues but it hasn’t failed.