!
interface r4-eth0
  ip ospf hello-interval 2
  ip ospf dead-interval 10
  ip ospf area 1.2.3.4
!
interface r4-eth1
  ip ospf hello-interval 2
  ip ospf dead-interval 10
  ip ospf area 1.2.3.4
!
router ospf
  ospf router-id 4.0.0.0
  capability opaque
!