i add i pv6 with command [14:45:30][root@sparc64:/home/gaspo]$ ip tunnel add sit0 mode sit remote 37.3.202.34 local 23.252.146.83 ttl 64 dev sit0 ioctl: Invalid argument why ive me that error??? is normal metod for add ipv6 wit iptunnel...and work on all kind of debian...