No, it does not, it merely negotiates your registered tunnel parameters with TIC and sets the tunnel up. It is then up to OS to use and/or advertise the available prefix. Simply disable ipv6 on your (w)lan interface with something like sysctl net.ipv6.conf.eth0.disable_ipv6=1 and you're ipv6 blind/mute on the disabled interface.

It does nothing with 6to4 (read the link for more details). 6to4 is in 2002::/16 space and uses protocol-41. You likely meant 6in4. In short what AICCU does: - retrieve configuration details from the TIC (Tunnel Information & Control) server - configure the tunnel - if 'static' protocol-41, exit - if heartbeat, send out heartbeats - If AYIYA, handle the full AYIYA protocol For the rest it does not much else. Router advertisement is handled by an operating system utility (radvd on Linux, rtadvd on most other unices and Windows has it built-in). As you say that you want to use a notebook at customer sites, first be sure that you are allowed to tunnel from those locations (some networks have policies against it), second, as you will likely have a dynamic IP and will be behind a NAT of some sorts the best protocol to use is AYIYA.

Thanks, good to know.