Yesterday's Windows update causes IPv4 to be default

[Sander Steffann]

Hi,

> The stability of ipv6.msftncsi.com is quite good now.  I know of several
> probes checking it frequently, from different locations.

Ok, let's rephrase that to 'an outage somewhere between the user and ipv6.msftncsi.com'. Depending where the outage is the impact will be smaller/larger. It is still a very big step to go from 'ipv6.msftncsi.com is unreachable' to 'prefer IPv4 for all traffic for 30 days'.

I hope the algorithm is better than it seems from this discussion. It wouldn't be as bad if i.e. the result is cached for 30 minutes instead of 30 days :-)
> 


Sander