Steps below were done in Vista. Steps for Windows 7 might be a little different.
1. Open Regedit, navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters
Add STRING value called ‘DisabledComponents’ and set its value to 0; Reboot
Open the LAN adapter properties and open the IPv6 properties
Manually add an address from this subnet: 2001:db8:1f07:e9a::/64
Keep the prefix at 64
Add this gateway: 2001:db8:1f06:e9a::1
Add this DNS server: 2001:db8:200::2 (this is one of HE’s DNS servers)
Click OK and OK to save the changes
Open ‘cmd’ and type the following commands
netsh interface teredo set state disabled
netsh interface ipv6 add v6v4tunnel IP6Tunnel <your local IP address> 216.66.22.2
netsh interface ipv6 add address IP6Tunnel 2001:db8:1f06:e9a::2
netsh interface ipv6 add route ::/0 IP6Tunnel 2001:db8:1f06:e9a::1
10. Test IPv6 connectivity by pinging or opening a website like ipv6.google.com
Steps to configure host to act as IPv6 router
1. In CMD type: netsh int ipv6 set interface IP6Tunnel forwarding=enabled
2. Next, type: netsh int ipv6 set interface "Local Area Connection" forwarding=enabled advertise=enabled
3. Next, add the first address of the routed IP address to the Local Area Connection
netsh int ipv6 add address "Local Area Connection" 2001:db8:8:a0a::1
4. Next, add the default route and next hop for the tunnel and Local Area Connection, then publish it:
netsh int ipv6 set route 2001:db8:8:a0a::/64 "Local Area Connection" publish=yes
5. Next, add the default route for the tunnel and publish it:
netsh interface ipv6 set route ::/0 IP6Tunnel 2001:db8:7:a0a::1 publish=yes