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AICCU (Automatic IPv6 Connectivity Client Utility) makes it easy for users to get IPv6 connectivity. More info about AICCU can be found via: http://www.sixxs.net/tools/aiccu/
To able to use AICCU you need an Sixxs account, and Tunnel. You can request and account and tunnel by following the steps on the following link: http://www.sixxs.net/faq/account/?faq=10steps The request are handeled by SixXS staff. This means that it takes a number of days before your request is granted. But also that you should make sure all questions are properly filled. The type of tunnel you probably need to request is an Anything In Anything (AYIYA).
Creating a Feetz Image with AICCU
Follow the directions from the http://freetz.org/wiki/WikiStart.en# Wiki
After the following step you can configure the packages you want to have included in your image.
Make sure the following is selected:
[*] Show advanced options [*] Enable IPv6 support
Package selection ---> Standard packages ---> [*] aiccu - aiccu - ipv6 connectivity from sixxs
I also advice to add the following for easier troubleshooting:
Advanced options ---> BusyBox options ---> IPv6 Options ---> [*] ping6 command Advanced options ---> BusyBox options ---> IPv6 Options ---> [*] traceroute6 command
Setup in Freetz web-interface
AICCU requires a that the time and date to be correct.
So you need to give NTP some time at bootup of the router to obtain the current date and time.
To have this behavior you can configure the 'Maximal time waiting for time-synchronisation (seconds)' under the Advanced section.
When IPv6 package are routed though the IPv6 tunnel over IPv4 towards Sixxs, the router is using more CPU power than it just forwards IPv4 packets out over its default route. The IPv6 packages need an aditional IPv4 header when they are send out the router, and encapsulating the IPv6 package in an IPv4 takes up our precious and limited CPU resources.