Router R1
hostname R1
!
interface Loopback1
description
Engineering Department
ip address 10.1.1.1
255.255.255.0
ip ospf network
point-to-point
!
interface Loopback30
ip address
172.30.30.1 255.255.255.252
!
interface
Serial0/0/0
ip address 10.1.12.1
255.255.255.0
clock rate 64000
no shutdown
!
router ospf 1
network 10.1.1.0
0.0.0.255 area 0
network 10.1.12.0
0.0.0.255 area 0
default-information
originate always
!
end
Router R2
hostname R2
!
interface Loopback2
description
Marketing Department
ip address 10.1.2.1
255.255.255.0
ip ospf network
point-to-point
!
interface
Serial0/0/0
ip address 10.1.12.2
255.255.255.0
no shutdown
!
interface
Serial0/0/1
ip address 10.1.23.2
255.255.255.0
clock rate 64000
no shutdown
!
router ospf 1
area 23 virtual-link
192.168.103.1
network 10.1.2.0
0.0.0.255 area 0
network 10.1.12.0
0.0.0.255 area 0
network 10.1.23.0
0.0.0.255 area 23
Router R3
hostname R3
!
interface Loopback3
description
Accounting Department
ip address 10.1.3.1
255.255.255.0
ip ospf network
point-to-point
!
interface
Loopback100
ip address
192.168.100.1 255.255.255.0
ip ospf network
point-to-point
!
interface
Loopback101
ip address
192.168.101.1 255.255.255.0
ip ospf network
point-to-point
!
interface
Loopback102
ip address
192.168.102.1 255.255.255.0
ip ospf network
point-to-point
!
interface
Loopback103
ip address
192.168.103.1 255.255.255.0
ip ospf network
point-to-point
!
interface
Serial0/0/1
ip address 10.1.23.3
255.255.255.0
no shutdown
!
router ospf 1
area 23 virtual-link
10.1.2.1
area 100 range
192.168.100.0 255.255.252.0
network 10.1.3.0
0.0.0.255 area 23
network 10.1.23.0
0.0.0.255 area 23
network
192.168.100.0 0.0.3.255 area 100
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