===============================
R1#sh run
Building configuration...
Current configuration : 1589 bytes
!
!
hostname R1
!
track 1 interface Serial1/0 line-protocol
!
interface FastEthernet0/0
ip address 192.168.1.250 255.255.255.0
duplex auto
speed auto
standby 1 ip 192.168.1.254
standby 1 priority 110
standby 1 preempt
standby 1 authentication md5 key-string 123
standby 1 track 1 decrement 50
!!
router ospf 1
log-adjacency-changes
network 10.1.1.0 0.0.0.3 area 0.0.0.0
network 192.168.1.0 0.0.0.255 area 0.0.0.0
!
end
R1#
===============================
===============================
R2#sh run
Building configuration...
!
hostname R2
!
track 1 interface Serial1/0 line-protocol
!
interface FastEthernet0/0
ip address 192.168.1.251 255.255.255.0
duplex auto
speed auto
standby 1 ip 192.168.1.254
standby 1 preempt
standby 1 authentication md5 key-string 123
standby 1 track 1 decrement 50
!
interface Serial1/0
ip address 10.1.2.1 255.255.255.252
encapsulation ppp
serial restart-delay 0
!
router ospf 1
log-adjacency-changes
network 10.1.2.0 0.0.0.3 area 0.0.0.0
network 192.168.1.0 0.0.0.255 area 0.0.0.0
!
!
end
R2#
==============================================================
R3#sh run
Building configuration...
!
hostname R3
!
track 1 interface Serial1/0 line-protocol
!
interface FastEthernet0/0
ip address 172.22.0.250 255.255.255.0
duplex auto
speed auto
standby 1 ip 172.22.0.254
standby 1 priority 110
standby 1 preempt
standby 1 authentication md5 key-string 123
standby 1 track 1 decrement 50
!
!
interface Serial1/0
ip address 10.1.1.2 255.255.255.0
encapsulation ppp
serial restart-delay 0
!
!
router ospf 1
log-adjacency-changes
network 10.1.1.0 0.0.0.3 area 0.0.0.0
network 172.22.0.0 0.0.0.255 area 0.0.0.0
!
!
end
R3#
==============================================================
R4#
R4#sh run
!
hostname R4
!
track 1 interface Serial1/0 line-protocol
!
interface FastEthernet0/0
ip address 172.22.0.251 255.255.255.0
duplex auto
speed auto
standby 1 ip 172.22.0.254
standby 1 preempt
standby 1 authentication md5 key-string 123
standby 1 track 1 decrement 50
!
interface Serial1/0
ip address 10.1.2.2 255.255.255.252
encapsulation ppp
serial restart-delay 0
!
!
router ospf 1
log-adjacency-changes
network 10.1.2.0 0.0.0.3 area 0.0.0.0
network 172.22.0.0 0.0.0.255 area 0.0.0.0
!
R4#
===============================
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