How to configure /etc/network/interface to use static IPv6, but dynamic IPv4?

Question

I want to add a static IPv6 IP to my otherwise automatic IP configuration. How to do this?

Currently I use:

auto lo
iface lo inet loopback
auto eth0

So IPv4 is configured by DHCP, IPv6 is configured by rtadv. However, I want to have additionally an IPv6 static adress? How to do this?

I tried with

iface eth0 inet6
address 2001:xxxx:yyyy:zzzz::3/64
netmask 64
gateway 2001:xxxx:yyyy:zzzz::1

But this results in a failure? (init-Script not terminates with code 100)

Solution

Test this:

auto lo
iface lo inet loopback

auto eth0
allow-hotplug eth0
iface eth0 inet dhcp

iface eth0 inet6 static
address 2001:db8::xxxx:yyyy
netmask 64
gateway 2001:db8::xxxx:yy:zzzz

Comments

[LittleByBlue]

Why not use NetworkManager, wich should be used since 12.04(?) instead of the *config family. See man NetworkManager