Usage for creating a 4over6 tunnel device (but it's not up afterward)

# /sbin/ip tunnel add <device> mode ip4ip6 remote <ipv6addressofforeigntunnel>
¬ local <ipv6addresslocal>

Usage (generic example for three tunnels):

# /sbin/ip -6 tunnel add ip6tnl1 mode ip4ip6 remote
¬ <ipv6addressofforeigntunnel1> local <ipv6addresslocal>
# /sbin/ip link set dev ip6tnl1 up 
# /sbin/ip -6 route add <prefixtoroute1> dev ip6tnl1 metric 1

# /sbin/ip -6 tunnel add ip6tnl2 mode ip4ip6 remote
¬ <ipv6addressofforeigntunnel2> local <ipv6addresslocal>
# /sbin/ip link set dev ip6tnl2 up
# /sbin/ip -6 route add <prefixtoroute2> dev ip6tnl2 metric 1

# /sbin/ip -6 tunnel add ip6tnl3 mode ip4ip6 remote
¬ <ipv6addressofforeigntunnel3> local <ipv6addresslocal>
# /sbin/ip link set dev ip6tnl3 up
# /sbin/ip -6 route add <prefixtoroute3> dev ip6tnl3 metric 1