root[~] $ ip -6 r s
2a01:198:200:94::/64 via :: dev sixxs metric 256 expires 21280617sec mtu 1280 advmss 1220 hoplimit 4294967295
fe80::/64 dev eth0 metric 256 expires 21280616sec mtu 1500 advmss 1220 hoplimit 4294967295
fe80::/64 via :: dev sixxs metric 256 expires 21280617sec mtu 1280 advmss 1220 hoplimit 4294967295
default via 2a01:198:200:94::1 dev sixxs metric 1024 expires 21280617sec mtu 1280 advmss 1220 hoplimit 4294967295
root[~] $ ip -6 a s
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::213:d3ff:fea9:e92f/64 scope link
valid_lft forever preferred_lft forever
8: sixxs@NONE: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1280
inet6 2a01:198:200:94::2/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::58c6:972b/128 scope link
valid_lft forever preferred_lft forever
################
auto sixxs
iface sixxs inet6 v4tunnel
address 2a01:198:200:94::2
netmask 64
endpoint 91.184.37.98
local 88.198.151.43
ttl 64
up ip link set mtu 1280 dev sixxs
up ip route add default via 2a01:198:200:94::1 dev sixxs
down ip -6 route flush dev sixxs