Configuring OSPF Multiarea







Configuration R1:


enable
configure terminal
hostname R1
!
interface FastEthernet0/1
 ip address 172.16.10.1 255.255.255.0
 no shutdown
!
interface Serial0/0
 ip address 172.16.20.1 255.255.255.0
 no shutdown
 exit
!
router ospf 100
 log-adjacency-changes
 passive-interface FastEthernet0/1
 network 172.16.10.0 0.0.0.255 area 1
 network 172.16.20.0 0.0.0.255 area 1
!
end
write memory
!

Configuration R2:
enable
configure terminal
hostname R2
!
interface FastEthernet0/1
 ip address 172.16.30.1 255.255.255.0
 no shutdown
!
interface Serial0/0
 ip address 192.168.10.2 255.255.255.0
 no shutdown
!
interface Serial0/1
 ip address 172.16.20.2 255.255.255.0
 no shutdown
 clock rate 64000
!
!
router ospf 100
 log-adjacency-changes
 passive-interface FastEthernet0/1
 network 172.16.20.0 0.0.0.255 area 1
 network 172.16.30.0 0.0.0.255 area 0
 network 192.168.10.0 0.0.0.255 area 2
!
!
end
write memory
!

Configuration R3:
enable
configure terminal
hostname ISP
!
interface FastEthernet0/1
 ip address 192.168.20.1 255.255.255.0
 no shutdown
!
interface Serial0/0
 ip address 192.168.10.1 255.255.255.0
 no shutdown
 clock rate 2000000
!
router ospf 100
 log-adjacency-changes
 passive-interface FastEthernet0/1
 network 192.168.20.0 0.0.0.255 area 2
 network 192.168.10.0 0.0.0.255 area 2
!
end
write memory
!


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