GNU nano 2.2.6 File: /etc/network/interfaces

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

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
allow-hotplug eth0
iface eth0 inet static
address 192.168.0.4
netmask 255.255.255.0
network 192.168.0.0
broadcast 192.168.0.255
gateway 192.168.0.1
# dns-* options are implemented by the resolvconf package, if installed
#dns-nameservers 192.168.0.1

auto eth1
allow-hotplug eth1
iface eth1 inet static
address 192.168.3.1
netmask 255.255.255.0
network 192.168.3.0
broadcast 192.168.3.255
#gateway 192.168.0.1
# dns-* options are implemented by the resolvconf package, if installed
#dns-nameservers 192.168.3.1