I would like to point out that the aixxs-aiccu client isn't needed at all in most cases. Simply use /etc/hostname.gif0 with the appropriate 'up giftunnel' and 'up inet6' lines and set your default ipv6 route. Nothing more is needed.
However, if your IPv6 host is behind a router or firewall that blocks protocol 41 then using aiccu for its AYIYA tunneling protocol makes sense. The port that comes with the sixxs distfile is outdated. Attached is a proper port for -current that I created to use AYIYA.
aiccu.tar.gz
Description: application/tgz
