Comment 6 for bug 508996

With netowork manager disabled and with an /etc/network/interfaces file that looks like this:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
        address 10.0.0.100
        netmask 255.255.255.0
        gateway 10.0.0.1

auto eth0:1
iface eth0:1 inet6 static
        address 2001:db8::100
        netmask 64
        gateway 2001:db8::1

I get the following error when tyring to bring up an aliased interface

$ sudo ifup eth0:1
error: "net.ipv6.conf.eth0:1.autoconf" is an unknown key
Failed to bring up eth0:1.