router<br>ospf area 0<br><br>network 0.0.0.0 255.255.255.0 area 0

ospf<br>1<br><br>area 0<br><br>network 0.0.0.0 0.0.0.0

router<br>ospf 1<br><br>area 0<br><br>network 0.0.0.0 0.0.0.0

router<br>ospf area 0<br><br>network 0.0.0.0 255.255.0.0 area 0