:~$ 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

auto p3p1
iface p3p1 inet static
   address 192.168.1.2
   netmask 255.255.255.0
   gateway 192.168.1.1
   dns-search google.com
   dns-nameservers 8.8.8.8  

auto p5p1
iface p5p1 inet static
   address 10.0.0.1
   netmask 255.255.255.0
#   gateway 192.168.1.2
#   dns-search google.com
#   dns-nameservers 8.8.8.8