Cisco: OSPF Sederhana
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Topologi
R1
e1 -- R3: e1 e2 -- R2: e1 e3 -- NAT: Internet
R2
e1 -- R2: e1 e2 -- R3: e2 e3 -- LAN 172.16.1.1
R3
e1 -- R1: e1 e2 -- R2: e2 e3 -- LAN 192.168.1.1
Konfigurasi
Router1:
enable
configure terminal
interface ethernet1/1
ip address 10.10.1.1 255.255.255.252
no shutdown
exit
interface ethernet1/2
ip address 10.10.1.5 255.255.255.252
no shutdown
exit
!
! NAT GNS3 gw 192.168.122.1
interface ethernet1/3
ip address 192.168.122.100 255.255.255.0
ip address 192.168.122.101 255.255.255.0 secondary
ip address 192.168.122.102 255.255.255.0 secondary
no shutdown
ip route 0.0.0.0 0.0.0.0 192.168.122.1
end
Router2:
enable
configure terminal
interface ethernet1/1
ip address 10.10.1.6 255.255.255.252
no shutdown
exit
interface ethernet1/2
ip address 10.10.1.9 255.255.255.252
no shutdown
exit
interface ethernet1/3
ip address 172.16.1.1 255.255.0.0
no shutdown
end
Router3:
enable
configure terminal
interface ethernet1/1
ip address 10.10.1.2 255.255.255.252
no shutdown
exit
interface ethernet1/2
ip address 10.10.1.10 255.255.255.252
no shutdown
exit
interface ethernet1/3
ip address 192.168.1.1 255.255.255.0
no shutdown
end
Ada tiga (3) elemen dasar konfigurasi OSPF:
- Enable OSPF instance
- OSPF area configuration
- OSPF network configuration
Catatan: Ingat bahwa backbone area-id adalah 0.0.0.0.
R1
enable configure terminal ! ! area 0 = backbone router ospf 1 network 10.10.1.0 0.0.0.3 area 0.0.0.0 network 10.10.1.4 0.0.0.3 area 0.0.0.0 end
R2
enable configure terminal ! ! area 0 = backbone router ospf 2 network 10.10.1.4 0.0.0.3 area 0.0.0.0 network 10.10.1.8 0.0.0.3 area 0.0.0.0 network 172.16.0.0 0.0.255.255 area 0.0.0.0 end
R3
enable configure terminal ! ! area 0 = backbone router ospf 3 network 10.10.1.0 0.0.0.3 area 0.0.0.0 network 10.10.1.8 0.0.0.3 area 0.0.0.0 network 192.168.1.0 0.0.0.255 area 0.0.0.0 end
Verify
Cek di R1, R2, R3
show ip ospf neighbor show ip ospf database show ip route