There’s another way to create vlan interfaces with Debian/Ubuntu. It’s even shorter than the previous example. Just add the following to /etc/network/interfaces:

auto eth0.10
  iface eth0.10 inet static
  addres 10.0.0.2
  netmask 255.255.255.0
  gateway 10.0.0.1

Just make sure you dit ‘apt-get install vlan’ or something like that.