[jfr]

Tip: Point your customers to http://omgipv6day.com/ , now.

The site will tell if your Internet access will be fine on World IPv6 day. A positive answer means that you either have IPv4 only connection (no broken IPv6 DNS responses or routes), or have a fully operational IPv6 nameserver and route to the Internet. A negative answer means that your computer was tricked into using IPv6 while no actual IPv6 connectivity exists (and thus you are going to have problems on June 8th).

For a more detailed test: http://test-ipv6.com/

[bodyfour]

Or just attempt to load a dual-stack site. A few examples off the top of my head: http://www.freebsd.org/ http://www.debian.org/ http://www.ucla.edu/

Each of those has been dual-stack for years now. If you can load them without an egregious delay then you'll have no problem on June 8th.

[techsupporter]

I get different results from those sites. The first says that everything will be fine because my setup only does IPv4[1]. The second says everything will be fine because my setup fully implements IPv6[2].

This seems somehow strange.

1 - This web browser (at this location) looks safe. You'll just keep using IPv4.

2 - Congratulations! You appear to have both IPv4 and IPv6 internet working.

[kaerast]

I've run that on all manner of devices and infrastructures and it has never told me I will have any problems on World IPv6 Day. That's not because it is inacurate, it's because the vast majority of setups will continue to work perfectly on June 8th.

[ioshints]

The more out-of-the-box your setup is, the more likely it'll work (modulo a few broken OS/browser combos listed in the ARIN wiki).

You might experience problems in environments where someone has been playing with IPv6 and left it half-broken (or, in my case, tried to be too smart and used DNS server on Cisco router ;)