Lab 6. EIGRP – Filtering – AD

 Lab 6. EIGRP – Filtering – AD

Pada lab ini kita akan melakukan filtering dengan cara mengubah nilai AD pada route menjadi 255 (unreachable). Misalkan kita ingin ip loopback R3 tidak ditampilkan pada routing table R1 dan R2, kita harus mengubah nilai administrative distance nya menjadi 255 (unreachable).

Sebelum lanjut ke lab, kita hapus dahulu konfigurasi filtering pada lab sebelumnya:

-R2

Router(config)#no access-list 1 permit 0.0.0.1 255.255.255.254

Router(config)#router eigrp 10

Router(config-router)#no distribute-list 1 in ethernet 0/1

Pertam akita lihat table routing sebelum di filter:

-R2

3.0.0.0/8 is variably subnetted, 5 subnets, 4 masks

D        3.3.3.16/28 [90/409600] via 23.23.23.2, 00:36:15, Ethernet0/1

D        3.3.3.32/29 [90/409600] via 23.23.23.2, 00:36:15, Ethernet0/1

D        3.3.3.96/27 [90/409600] via 23.23.23.2, 00:36:15, Ethernet0/1

D        3.3.3.148/30 [90/409600] via 23.23.23.2, 00:36:15, Ethernet0/1

D        3.3.3.192/28 [90/409600] via 23.23.23.2, 00:36:15, 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

L        12.12.12.2/32 is directly connected, Ethernet0/0

      23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

Selanjutnya kita akan konfigurasikan nilai AD yang paling besar, yaitu 255 pada network 3.3.3.0

 

 

-R2

Router(config)#access-list 1 permit 3.3.3.0 0.0.0.255

Router(config)#router eigrp 10

Router(config-router)#distance 255 0.0.0.0 255.255.255.255 1

Maksud dari perintah “access-list 1 permit 3.3.3.0 0.0.0.255” adalah ip 3.3.3.0 sampai 3.3.3.255 akan dirubah AD nya menjadi 255 atau unreachable.

 

Kemudian kita cek table routing pada R1 dan R2

-R1

Router(config)#do show ip route

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

D        23.23.23.0 [90/307200] via 12.12.12.2, 00:00:32, Ethernet0/0

-R2

Router(config)#do show ip route

12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

C        12.12.12.0/24 is directly connected, Ethernet0/0

L        12.12.12.2/32 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

L        23.23.23.1/32 is directly connected, Ethernet0/1

Maka ip loopback R3 sudah tidak ditampilkan lagi di routing table R1 dan R2.