Lab 43 - EIGRP Summarization

Pada lab ini kita akan belajar melakukan summarization pada jaringan EIGRP. Berikut topologi yang akan kita gunakan

Gambar 1 Topologi jaringan EIGRP

Diasumsikan kita telah mengkonfigurasi EIGRP pada ketiga router sesuai dengan topologi ditas. Pastikan R1 dan R2 memiliki informasi routing yang lengkap

R2(config-router)#do sh ip ro 
      10.0.0.0/32 is subnetted, 6 subnets
D        10.10.10.1 [90/409600] via 23.23.23.3, 00:00:10, Ethernet0/1
D        10.10.10.2 [90/409600] via 23.23.23.3, 00:00:10, Ethernet0/1
D        10.10.10.3 [90/409600] via 23.23.23.3, 00:00:10, Ethernet0/1
D        10.10.10.4 [90/409600] via 23.23.23.3, 00:00:10, Ethernet0/1
D        10.10.10.5 [90/409600] via 23.23.23.3, 00:00:10, Ethernet0/1
D        10.10.10.6 [90/409600] via 23.23.23.3, 00:00:10, Ethernet0/1
      12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        12.12.12.0/24 is directly connected, Ethernet0/0
      23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        23.23.23.0/24 is directly connected, Ethernet0/1

R1(config-router)#do sh ip ro

      10.0.0.0/32 is subnetted, 6 subnets
D        10.10.10.1 [90/435200] via 12.12.12.2, 00:01:05, Ethernet0/0
D        10.10.10.2 [90/435200] via 12.12.12.2, 00:01:05, Ethernet0/0
D        10.10.10.3 [90/435200] via 12.12.12.2, 00:01:05, Ethernet0/0
D        10.10.10.4 [90/435200] via 12.12.12.2, 00:01:05, Ethernet0/0
D        10.10.10.5 [90/435200] via 12.12.12.2, 00:01:05, Ethernet0/0
D        10.10.10.6 [90/435200] via 12.12.12.2, 00:01:05, Ethernet0/0
      12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        12.12.12.0/24 is directly connected, Ethernet0/0
      23.0.0.0/24 is subnetted, 1 subnets
D        23.23.23.0 [90/307200] via 12.12.12.2, 00:02:18, Ethernet0/0

Perhatikan bahwa R1 dan R2 memiliki enam route EIGRP dari R3. Untuk alasan efektifitas, kita disarankan untuk melakukan summarization agar keenam route tersebut diringkas hanya menjadi satu route saja. Berikut konfigurasi summarization yang perlu kita lakukan di R3

R3(config)#int eth0/0
R3(config-if)#ip summary-address eigrp 1 10.10.10.0 255.255.255.248

Untuk pengujian kita coba lihat tabel routing di R2 dan R1

R2(config-router)#do sh ip ro

      10.0.0.0/29 is subnetted, 1 subnets
D        10.10.10.0 [90/409600] via 23.23.23.3, 00:01:12, Ethernet0/1
      12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        12.12.12.0/24 is directly connected, Ethernet0/0
      23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        23.23.23.0/24 is directly connected, Ethernet0/1

R1(config-router)#do sh ip ro

      10.0.0.0/29 is subnetted, 1 subnets
D        10.10.10.0 [90/435200] via 12.12.12.2, 00:01:56, Ethernet0/0
      12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        12.12.12.0/24 is directly connected, Ethernet0/0
      23.0.0.0/24 is subnetted, 1 subnets
D        23.23.23.0 [90/307200] via 12.12.12.2, 00:07:11, Ethernet0/0

Perhatikan bahwa saat ini R1 dan R2 hanya memiliki satu buah route EIGRP, namun satu route ini sudah mencangkup seluruh IP Loopback R3, untuk pembuktian kita coba ping dari R1 ke IP Loopback R3

R1(config-router)#do ping 10.10.10.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
R1(config-router)#do ping 10.10.10.6

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms