#
#   /etc/network/interfaces
#

# Loopback.
auto lo
iface lo inet loopback

# Another loopback.
auto lo:50
iface lo:50 inet static
    address 192.168.0.1
    netmask 255.255.255.255

# VLANs.
auto eth0
auto eth0.100
auto eth0.333
auto eth0.333.400

# Physical interface,
iface eth0 inet manual
    mtu 1508
    pre-up /sbin/ifconfig eth0 mtu 1508

# Vlan 100.
iface eth0.100 inet static
    address <IP_ADDR>
    netmask <IP_MASK>
    gateway <GATEWAY>
    dns-nameservers <DNS1> <DNS2>
    mtu 1500

# Vlan 333.
iface eth0.333 inet manual
    mtu 1500
    up /sbin/vconfig add eth0.333 400

# Vlan 333.400.
iface eth0.333.400 inet static
    address <IP_ADDR>
    netmask <IP_MASK>
    mtu 1500
    pre-up /sbin/ifconfig eth0.333 up