Binary package “vlan” in ubuntu oneiric
user mode programs to enable VLANs on your ethernet devices
This package contains the user mode programs you need to add and remove
VLAN devices from your ethernet devices.
A typical application for a VLAN enabled box is a single wire firewall,
router or load balancer.
You need a VLAN Linux kernel for this. Linux kernel versions >= 2.4.14
have VLAN support.