IPv6が動かない

さくらVPSでIPv6がなぜか動かない...現在の設定。

denchu@sakura:~$ ip -6 route list
2401:2500:102:1116::/64 dev eth0 proto kernel metric 256
fe80::/64 dev eth0 proto kernel metric 256
default via fe80::1 dev eth0 metric 1024

denchu@sakura:~$ ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 52:54:09:01:60:47 brd ff:ff:ff:ff:ff:ff
inet 133.242.190.61/23 brd 133.242.191.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 2401:2500:102:1116:133:242:190:61/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::5054:9ff:fe01:6047/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 52:54:09:01:65:47 brd ff:ff:ff:ff:ff:ff
4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 52:54:09:01:6a:47 brd ff:ff:ff:ff:ff:ff

なぜ動かない...