!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$rAR3$vEgjuuNdPhBqygrGM0F1d1
!
no aaa new-model
ip subnet-zero
!
!
no ip domain lookup
!
ip cef
!
!
!
!
!
!
!
!
!
!
!
!
!
! 
!
!
!
!
interface Loopback0
 ip address 172.17.0.1 255.255.255.255
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex half
!
interface Serial1/0
 description R2 S1/0
 ip address 192.168.100.1 255.255.255.252
 serial restart-delay 0
!
interface Serial1/1
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/2
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/3
 description R4 S1/3
 ip address 192.168.100.14 255.255.255.252
 serial restart-delay 0
!
interface Serial1/4
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/5
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/6
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/7
 no ip address
 shutdown
 serial restart-delay 0
!
router ospf 100
 router-id 172.17.0.1
 log-adjacency-changes
 network 192.168.100.1 0.0.0.0 area 0
 network 192.168.100.14 0.0.0.0 area 0
!
ip classless
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 stopbits 1
line aux 0
 stopbits 1
line vty 0 4
 password network
 login
!
!
end