# ip -6 route
unreachable ::/96 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
unreachable ::ffff:0.0.0.0/96 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
2001:470:1f0a:1c1::3 dev eth1  metric 1024  expires 21333568sec mtu 1500 advmss 1440 hoplimit 4294967295
2001:470:1f0a:1c1::/64 via :: dev he-ipv6  metric 256  expires 21331422sec mtu 1480 advmss 1420 hoplimit 4294967295
unreachable 2002:a00::/24 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
unreachable 2002:7f00::/24 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
unreachable 2002:a9fe::/32 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
unreachable 2002:ac10::/28 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
unreachable 2002:c0a8::/32 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
unreachable 2002:e000::/19 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
unreachable 3ffe:ffff::/32 dev lo  metric 1024  expires 21298645sec error -101 mtu 16436 advmss 16376 hoplimit 4294967295
fe80::/64 dev eth0  metric 256  expires 21298639sec mtu 1500 advmss 1440 hoplimit 4294967295
fe80::/64 dev eth1  metric 256  expires 21298640sec mtu 1500 advmss 1440 hoplimit 4294967295
fe80::/64 via :: dev he-ipv6  metric 256  expires 21331411sec mtu 1480 advmss 1420 hoplimit 4294967295
default dev he-ipv6  metric 1024  expires 21331427sec mtu 1480 advmss 1420 hoplimit 4294967295


this is the commands i've ran:

fedora (gw):

[root:~]# ip tunnel add he-ipv6 mode sit remote 216.66.80.30 local 89.136.171.229 ttl 255
[root:~]# ip link set he-ipv6 up
[root:~]# ip addr add 2001:0470:1f0a:1c1::2/64 dev he-ipv6
[root:~]# ip route add ::/0 dev he-ipv6
[root:~]# ip -f inet6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
    inet6 fe80::240:f4ff:fecd:7b8e/64 scope link
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
    inet6 fe80::240:f4ff:fe76:4ab0/64 scope link
       valid_lft forever preferred_lft forever
5: he-ipv6@NONE: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1480
    inet6 2001:470:1f0a:1c1::2/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::5988:abe5/128 scope link
       valid_lft forever preferred_lft forever

ubuntu (client):

[root:~]# ip -6 addr add 2001:470:1f0a:1c1::3/64 dev eth0
[root:~]# ip -6 route add default via 2001:470:1f0a:1c1::2 dev eth0