Router#show run
Building configuration...

Current configuration : 1179 bytes
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version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
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hostname Router
!
boot-start-marker
boot-end-marker
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no aaa new-model
ip subnet-zero
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ip cef
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interface Loopback0
 ip address 1.1.1.1 255.255.255.0
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interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!         
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial1/0
 ip address 12.0.0.1 255.255.255.0
 ip ospf message-digest-key 5 md5 md5pass
 serial restart-delay 0
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interface Serial1/1
 ip address 13.0.0.1 255.255.255.0
 ip ospf message-digest-key 5 md5 md5pass
 serial restart-delay 0
!
interface Serial1/2
 no ip address
 shutdown
 serial restart-delay 0
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interface Serial1/3
 no ip address
 shutdown
 serial restart-delay 0
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router ospf 100
 router-id 1.1.1.1
 log-adjacency-changes
 area 0 authentication message-digest
 network 1.1.1.0 0.0.0.255 area 0
 network 12.0.0.1 0.0.0.0 area 0
 network 13.0.0.1 0.0.0.0 area 0
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ip http server
no ip http secure-server
ip classless
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line con 0
line aux 0
line vty 0 4
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end