* Nathan Ward
You are very unlikely to get traffic from Teredo, because: 1) Windows only asks for AAAA if it has non-Teredo IPv6 connectivity 2) When Windows has non-Teredo IPv6 connectivity and so can ask for AAAA, preference for reaching your web content is going to be non-Teredo IPv6 -> IPv4 -> Teredo, due to the prefix policy table, unless you have an AAAA in 2001::/32 (Teredo space), in which case it will prefer IPv4 -> Teredo.
With 6to4, Windows hosts will ask for AAAA, and will prefer non-6to4 IPv6 over 6to4 over IPv4. I'm a little surprised at how little 6to4 traffic you get.
Teredo gets most use when an application asks for a connection to a certain IPv6 address, without DNS. This is most common in peer to peer - you're not going to levels of web traffic and P2P traffic using Teredo that are comparable ratios to IPv4.
When it comes to HTTP traffic, that's not always the case: The Opera web browser in all recent versions will unconditionally prefer IPv6 (including Teredo and 6to4) over IPv4. Since Windows Vista and newer automatically configure Teredo and/or 6to4, this is the biggest single reason for regular clients being unable to access dualstacked websites here in Norway, according to my measurements (which are done in a similar fashion to yours). In case you're interested, I've been posting reports to the ipv6-ops list about it for a few months now: http://thread.gmane.org/gmane.org.operators.ipv6/2636 http://thread.gmane.org/gmane.org.operators.ipv6/2683 http://thread.gmane.org/gmane.org.operators.ipv6/2764 http://thread.gmane.org/gmane.org.operators.ipv6/2908 Opera has fortunately improved the behaviour in their next version (10.50) by simply using getaddrinfo() on Windows. It is due to be released in a month or two - hopefully then I'll be able to talk some of my customers into dualstacking their content. Best regards, -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com/ Tel: +47 21 54 41 27