roberto@pearljam:~$ cat /etc/network/interfaces 
# 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

iface eth0 inet static
address 169.254.84.176
netmask 255.255.0.0






iface eth1 inet dhcp
address 169.254.84.176
netmask 255.255.0.0

auto eth0

auto eth1
roberto@pearljam:~$ 

PORTATILINO

auto lo
iface lo inet loopback

iface eth0 inet dhcp
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto wlan0
iface wlan0 inet dhcp