interface R3-eth0
 ip ospf dead-interval 4
 ip ospf hello-interval 1
interface R3-eth1
 ip ospf dead-interval 4
 ip ospf hello-interval 1
interface R3-eth2
 ip ospf dead-interval 4
 ip ospf hello-interval 1
interface R3-eth3
 ip ospf dead-interval 4
 ip ospf hello-interval 1
interface R3-eth4
 ip ospf dead-interval 4
 ip ospf hello-interval 1
interface R3-eth5
 ip ospf dead-interval 4
 ip ospf hello-interval 1
router ospf
 network 10.20.0.0/16 area 0
 network 10.30.0.0/16 area 0
 network 3.3.3.3/32 area 0