!
router ospf
 network 10.20.0.0/16 area 0
 network 10.20.20.20/32 area 0
!
int P1-eth0
 ip ospf hello-interval 2
 ip ospf dead-interval 10
!
int P1-eth1
 ip ospf hello-interval 2
 ip ospf dead-interval 10
!
