Lab 1. OSPF Virtual Link
Lab 1. OSPF Virtual Link
Pada Lab pertama OSPF ini, kita akan membuat konfigurasi Virtual Link. yang mana Virtual Link ini sangat dibutuhkan di dunia perinternetan OSPF. karena Virtual Link ini berfingsi untuk menghubungkan area OSPF yang tidak terhubung langsung ke area 0. Untuk itu ada beberapa solusi yang kesemuanya adalah hanya bersifat sementara, tidak boleh dijadikan permanen, yaitu :
1. Virtual Link
2. GRE Tunnel
Dan pada lab ini kita akan mengkonfigurasikan Virtual Link, dalam hal ini akan ada pembuatan 2 virtual link, yakni dari Area 2 ke Area 0, kemudian dari Area 3 ke Area 0
ROUTER 1 :
R-1(config)#int lo0R-1(config-if)#ip add 1.1.1.1 255.255.255.255
R-1(config-if)#
R-1(config-if)#int fa0/0
R-1(config-if)#ip add 12.12.12.1 255.255.255.0
R-1(config-if)#no sh
R-1(config-if)#
R-1(config-if)#router ospf 1
R-1(config-router)#router-id 1.1.1.1
R-1(config-router)#network 1.1.1.1 0.0.0.0 area 0
R-1(config-router)#network 12.12.12.1 0.0.0.0 area 1
R-1(config-router)#ex
R-1(config)#
ROUTER 2 :
R-2(config)#int lo0
R-2(config-if)#ip add 2.2.2.2 255.255.255.255
R-2(config-if)#
R-2(config-if)#int fa0/0
R-2(config-if)#ip add 12.12.12.2 255.255.255.0
R-2(config-if)#no sh
R-2(config-if)#
R-2(config-if)#int g1/0
R-2(config-if)#ip add 23.23.23.2 255.255.255.0
R-2(config-if)#no sh
R-2(config-if)#ex
R-2(config)#
R-2(config)#router ospf 2
R-2(config-router)#router-id 2.2.2.2
R-2(config-router)#network 2.2.2.2 0.0.0.0 area 1
R-2(config-router)#network 12.12.12.2 0.0.0.0 area 1
R-2(config-router)#network 23.23.23.2 0.0.0.0 area 2
R-2(config-router)#ex
R-2(config)#
ROUTER 3 :
R-3(config)#int lo0
R-3(config-if)#ip add 3.3.3.3 255.255.255.255
R-3(config-if)#
R-3(config-if)#int g1/0
R-3(config-if)#ip add 23.23.23.3 255.255.255.0
R-3(config-if)#no sh
R-3(config-if)#ex
R-3(config)#
R-3(config)#router ospf 3
R-3(config-router)#router-id 3.3.3.3
R-3(config-router)#network 3.3.3.3 0.0.0.0 area 3
R-3(config-router)#network 23.23.23.3 0.0.0.0 area 2
R-3(config-router)#ex
R-3(config)#
Jika sudah mengkonfigurasikan OSPF, kita cek terlebih dahulu routing tablenya di R1,R2 dan R3.
ROUTER 1 :
R-1(config)#do sh ip route
1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/2] via 12.12.12.2, 00:05:57, FastEthernet0/0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.12.12.0/24 is directly connected, FastEthernet0/0
L 12.12.12.1/32 is directly connected, FastEthernet0/0
ROUTER 2 :
R-2(config)#do sh ip route
1.0.0.0/32 is subnetted, 1 subnets
O IA 1.1.1.1 [110/2] via 12.12.12.1, 00:06:08, FastEthernet0/0
2.0.0.0/32 is subnetted, 1 subnets
C 2.2.2.2 is directly connected, Loopback0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.12.12.0/24 is directly connected, FastEthernet0/0
L 12.12.12.2/32 is directly connected, FastEthernet0/0
23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 23.23.23.0/24 is directly connected, GigabitEthernet1/0
L 23.23.23.2/32 is directly connected, GigabitEthernet1/0
ROUTER 3 :
R-3(config)#do sh ip route
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 23.23.23.0/24 is directly connected, GigabitEthernet1/0
L 23.23.23.3/32 is directly connected, GigabitEthernet1/0
Jika sudah sesuai tabel routing nya, kita konfigurasikan Virtual Linknya
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