auto lo
iface lo inet loopback

auto ra0
iface ra0 inet static
   address 192.168.0.150
   gateway 192.168.0.1
   broadcast 192.168.0.255
   netmask 255.255.255.0
   wireless-essid dlink
   wireless-mode Managed
   wireless-channel 3
   wireless-ap mac:mac:mac:mac:mac:mac