I have an Airport Extreme (w/ IPv6 support). I have Cox HSI which includes an automatic tunnel configuration. And it works great!
IPv6 for Windows worked rather well too for a good many months... then BOOM I notice IPv6 not working. I go to investigate. I swear Windows is now trying to make a 6to6to4 tunnel. Well there is no such thing so obviously I'm nuts or Windows is crazy!
I'll show you the ipconfig info below.
Ethernet adapter Local Area Connection 2:
Connection-specific DNS Suffix . : ph.cox.net
Description . . . . . . . . . . . : Intel(R) PRO/1000 EB Network Connection with I/O Acceleration #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 10.0.1.111
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IP Address. . . . . . . . . . . . : 2002:44e2:1771:0:58fa:9d8e:1300:4863
IP Address. . . . . . . . . . . . : 2002:44e2:1771:0:217:f2ff:fe05:c58d
IP Address. . . . . . . . . . . . : ::58fa:9d8e:1300:4863
IP Address. . . . . . . . . . . . : ::217:f2ff:fe05:c58d
IP Address. . . . . . . . . . . . : fe80::217:f2ff:fe05:c58d%4
Default Gateway . . . . . . . . . : 10.0.1.1
fe80::224:36ff:fe9e:9cc8%4
fe80::223:12ff:fef8:9b15%4
DHCP Server . . . . . . . . . . . : 10.0.1.1
DNS Servers . . . . . . . . . . . : 10.0.1.1
fec0:0:0:ffff::1%1
fec0:0:0:ffff::2%1
fec0:0:0:ffff::3%1
Primary WINS Server . . . . . . . : 192.168.100.1
Lease Obtained. . . . . . . . . . : Tuesday, June 01, 2010 12:06:01 PM
Lease Expires . . . . . . . . . . : Tuesday, June 08, 2010 12:06:01 PM
The two IP addresses..
IP Address. . . . . . . . . . . . : 2002:44e2:1771:0:58fa:9d8e:1300:4863
IP Address. . . . . . . . . . . . : ::58fa:9d8e:1300:4863
Shouldn't be there. They weren't there before when it worked. What is going on?
Make sure your airport isn't doing some sort of 6to4 thing. I think Windows will also try to do 6to4 under certain conditions (not really sure what those are though).
You can make sure it's turned off in windows by doing: netsh int ipv6 6to4 set state=disabled
It'd also help to see the output of these commands:
netsh int ipv6 show routes
netsh int ipv6 show addr level=verbose
Quote
You can make sure it's turned off in windows by doing: netsh int ipv6 6to4 set state=disabled
You may need to drop the equals sign, so it looks like
netsh int ipv6 6to4 set state disabled