connected route

Hi,

I think, something is wrong here.
The Server is missing a connected route.
I have this in /etc/network/interfaces:

iface eth0 inet6 static
  address 2001:868:0:100::14
  netmask 64
  gateway 2001:868:0:100::1

This is the output of ip -6 route:
  fe80::/64 dev eth0  proto kernel  metric 256  mtu 1500 advmss 1440 hoplimit 0
	default via 2001:868:0:100::1 dev eth0  metric 1  mtu 1500 advmss 1440 hoplimit 0

So if I then ping 2001:868:0:100::15 the packet gets sent to 2001:868:0:100::1 which
sends a icmp-redirect. Here's "ip -6 route get 2001:868:0:100::15":
  2001:868:0:100::15 from :: via 2001:868:0:100::1 dev eth0  src 2001:868:0:100::14  metric 1  mtu 1500 advmss 1440 hoplimit 0 

What am I missing ? Is this intentional ? Shouldn't I see a route like this:
  2001:868:0:100::/64 dev eth0  proto kernel  metric 256  mtu 1500 advmss 1440 hoplimit 0

If I use "ip addr add" to add the ip, I get this route. But not if I use
ifup.

Any Ideas or suggestions ?

Cheers,
  Christoph