Lab 14. OSPF - Summarization Area Range

kali ini kirta akan belajar OSPF internal route summarization dengan perintah area range, hapus dulu konfigurasi redistribute sebelumnya

R1(config)#router ospf 1
R1(config-router)#no redistribute connected subnets
R1(config-router)#no redistribute maximum-prefix 3
R1(config-router)#network 10.10.10.0 0.0.0.255 area 1

cek table routingnya, dan pastikan sudah normal

R3#sh ip route
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/21] via 23.23.23.2, 00:02:51, Ethernet0/0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/11] via 23.23.23.2, 00:02:51, Ethernet0/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
10.0.0.0/32 is subnetted, 6 subnets
O IA 10.10.10.1 [110/21] via 23.23.23.2, 00:02:00, Ethernet0/0
O IA 10.10.10.2 [110/21] via 23.23.23.2, 00:02:00, Ethernet0/0
O IA 10.10.10.3 [110/21] via 23.23.23.2, 00:02:00, Ethernet0/0
O IA 10.10.10.4 [110/21] via 23.23.23.2, 00:02:00, Ethernet0/0
O IA 10.10.10.5 [110/21] via 23.23.23.2, 00:02:00, Ethernet0/0
O IA 10.10.10.6 [110/21] via 23.23.23.2, 00:02:00, Ethernet0/0
12.0.0.0/24 is subnetted, 1 subnets
O 12.12.12.0 [110/20] via 23.23.23.2, 00:02:51, Ethernet0/0
23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 23.23.23.0/24 is directly connected, Ethernet0/0
L 23.23.23.3/32 is directly connected, Ethernet0/0

Kita konfigurasi Summary nya

R1(config)#router ospf 1
R1(config-router)#area 1 range 10.10.10.0 255.255.255.248

cek kembali table routingnya

R3#show ip route
1.0.0.0/32 is subnetted, 1 subnets
O 1.1.1.1 [110/21] via 23.23.23.2, 00:04:28, Ethernet0/0
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/11] via 23.23.23.2, 00:04:28, Ethernet0/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
10.0.0.0/29 is subnetted, 1 subnets
O IA 10.10.10.0 [110/21] via 23.23.23.2, 00:00:18, Ethernet0/0
12.0.0.0/24 is subnetted, 1 subnets
O 12.12.12.0 [110/20] via 23.23.23.2, 00:04:28, Ethernet0/0
23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 23.23.23.0/24 is directly connected, Ethernet0/0
L 23.23.23.3/32 is directly connected, Ethernet0/0

R1(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 [110/11] via 12.12.12.2, 00:00:58, Ethernet0/0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/21] via 12.12.12.2, 00:00:58, Ethernet0/0
10.0.0.0/8 is variably subnetted, 7 subnets, 2 masks
O 10.10.10.0/29 is a summary, 00:00:58, Null0
C 10.10.10.1/32 is directly connected, Loopback1
C 10.10.10.2/32 is directly connected, Loopback2
C 10.10.10.3/32 is directly connected, Loopback3
C 10.10.10.4/32 is directly connected, Loopback4
C 10.10.10.5/32 is directly connected, Loopback5 C 10.10.10.6/32 is directly connected, Loopback6
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.12.12.0/24 is directly connected, Ethernet0/0
L 12.12.12.1/32 is directly connected, Ethernet0/0
23.0.0.0/24 is subnetted, 1 subnets
O 23.23.23.0 [110/20] via 12.12.12.2, 00:00:58, Ethernet0/0

Bisa kita lihat diatas ip sudah tersummary pada R3, dan pada R1 OSPF discard route Null0 akan otomatis ada itu untuk menghindari terjadinya forwarding loop, jika ingin menghapusnya bisa dengan konfigurasi dibawah ini

R1(config)#router ospf 1
R1(config-router)#no discard-route internal

cek kembali table routingnya dan pastikan discard route Null0 sudah tidak ada

R1(config-router)#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 [110/11] via 12.12.12.2, 00:05:23, Ethernet0/0
3.0.0.0/32 is subnetted, 1 subnets
O 3.3.3.3 [110/21] via 12.12.12.2, 00:05:23, Ethernet0/0
10.0.0.0/32 is subnetted, 6 subnets
C 10.10.10.1 is directly connected, Loopback1
C 10.10.10.2 is directly connected, Loopback2
C 10.10.10.3 is directly connected, Loopback3
C 10.10.10.4 is directly connected, Loopback4
C 10.10.10.5 is directly connected, Loopback5
C 10.10.10.6 is directly connected, Loopback6
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C 12.12.12.0/24 is directly connected, Ethernet0/0
L 12.12.12.1/32 is directly connected, Ethernet0/0
23.0.0.0/24 is subnetted, 1 subnets
O 23.23.23.0 [110/20] via 12.12.12.2, 00:05:23, Ethernet0/0

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