!
hostname r3
ip forwarding
!
interface r3-eth0
 ip address 20.1.3.3/24
 ip ospf network broadcast
 ip ospf hello-interval 1
 ip ospf dead-interval 10
!
interface r3-eth1
 ip address 10.1.3.3/24
 ip ospf network broadcast
 ip ospf hello-interval 1
 ip ospf dead-interval 10
!
interface r3-eth2
 ip address 10.1.2.3/24
 ip ospf network broadcast
 ip ospf hello-interval 1
 ip ospf dead-interval 10
!
!
!
router ospf
  ospf router-id 3.3.3.3
  distance 20
  network 10.1.2.0/24 area 0
  network 10.1.3.0/24 area 0
  network 20.1.3.0/24 area 1
  area 1 range 20.1.0.0/16
  redistribute static
!
!
ip route 100.100.100.100/32 Null0
