hostname Router1
enable secret class
!
ip host Router1 172.16.2.33 172.16.1.2
ip host Router2 172.16.1.1 172.30.1.1 10.10.1.1
ip host Router3 10.10.1.2 172.30.2.1
!
interface loopback0
 ip address 192.168.1.1 255.255.255.255
 no shut
!
interface Ethernet0
 ip address 172.16.2.33 255.255.255.224
 no keepalive
 no shut
!
interface Serial0
 ip address 172.16.1.2 255.255.255.252
 clockrate 56000
 ip ospf authentication message-digest
 ip ospf hello-interval 5
 ip ospf dead-interval 20
 no shut
!
router ospf 50
 network 172.16.2.32 0.0.0.31 area 0
 network 172.16.1.0 0.0.0.3 area 0
!
line vty 0 4
 password cisco
 login
!
end