Obtenha o IPv6 para funcionar

Question

Estou tentando fazer o IPv6 funcionar.
Meu anfitrião me forneceu as seguintes informações:
Rede IPv6: 2a03:4000:2:483::/64
Gateway IPv6: fe80::1

Meu /etc/network/interfaces é assim:

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp

#IPV6 static configuration
iface eth0 inet6 static
pre-up modprobe ipv6
address 2a03:4000:2:483::2
netmask 64
gateway fe80::1
# END IPV6 configuration

E ifconfig gera o seguinte:

eth0      Link encap:Ethernet  HWaddr 52:54:7e:5a:c2:b4
          inet addr:46.38.236.169  Bcast:46.38.239.255  Mask:255.255.248.0
          inet6 addr: fe80::5054:7eff:fe5a:c2b4/64 Scope:Link
          inet6 addr: 2a03:4000:2:483::2/64 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:173542 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27863 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:10582552 (10.0 MiB)  TX bytes:1658598 (1.5 MiB)

ip -6 route show de saídas:

default via fe80::1 dev eth0  metric 1024

E route -6 :

Kernel IPv6 routing table
Destination                    Next Hop                   Flag Met Ref Use If
2a03:4000:2:483::/64           ::                         U    256 0     0 eth0
fe80::/64                      ::                         U    256 0     0 eth0
::/0                           fe80::1                    UG   1024 0     0 eth0
::/0                           ::                         !n   -1  1    50 lo
::1/128                        ::                         Un   0   1    25 lo
2a03:4000:2:483::2/128         ::                         Un   0   1    15 lo
fe80::5054:7eff:fe5a:c2b4/128  ::                         Un   0   1     0 lo
ff00::/8                       ::                         U    256 0     0 eth0
::/0                           ::                         !n   -1  1    50 lo

ping6 ipv6.google.com resultados em

PING ipv6.google.com(muc03s08-in-x04.1e100.net) 56 data bytes
From 2a03:4000:2:483::2 icmp_seq=1 Destination unreachable: Address unreachable
From 2a03:4000:2:483::2 icmp_seq=2 Destination unreachable: Address unreachable
From 2a03:4000:2:483::2 icmp_seq=3 Destination unreachable: Address unreachable
--- ipv6.google.com ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2999ms

O servidor está executando Debian 3.2.51-1 . Eu espero que você possa me ajudar com isso.