> Is anyone still seeing a lot of IPv6 traffic? In the last 15 minutes, we've received an average of about 15mbit/sec from 2a00:1450:400b::/48 port 80.
>
> URL logs indicate it's probably Youtube; we're seeing requests like:
>
> GET /videoplayback...
> Host: o-o.preferred.google-man3.v2.lscache6.c.youtube.com
Yes, as I understand it (and by that I mean "what Google has told me") Google believe the YouTube player is smart enough to figure out if IPv6 connectivity is broken and drop back to IPv4, so *unofficially* they have left the v*.lscache*.c.youtube.com names dual-stack.
They reserve the right to change it at a moment's notice, etc, etc...
Rob
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