Dual stack statistics?

[Tore Anderson]

* Ignatios Souvatzis

> Side note: this claims me to connect via IPv4. Investigating shows
> that it connects via map46.cisco.com, which makes me suspect that 
> the connection discovery <magicitem> only sees the connection from
> the map46.

Using Chrome by any chance? If so there's a perfectly good explanation
for it, map46.cisco.com's IPv6 connectivity quite simply sucks. This is
on native v6 in Norway:

tore at envy:~$ nping -4 --tcp-connect -c 5 6lab.cisco.com | grep rtt
Max rtt: 47.510ms | Min rtt: 41.501ms | Avg rtt: 44.245ms
tore at envy:~$ nping -6 --tcp-connect -c 5 6lab.cisco.com | grep rtt
Max rtt: 370.014ms | Min rtt: 368.259ms | Avg rtt: 368.913ms

300ms is AFAIK the cut-off time when Chrome's Happy Eyeballs
implementation decides it's not worth waiting for an IPv6 connection to
establish any longer.

Tore