EIGRP (ROUTING DINAMIS)

Enhanced Interior Gateway Routing Protocol (EIGRP) adalah routing protocol jenis hybrid. EIGRP merupakan propietary routing protocol yang dikembangkan oleh Cisco
Systems. EIGRP adalah pengembangan lanjutan dari IGRP.

EIGRP memiliki dua karakteristik gabungan antara Distance Vector Routing Protocol dan Link-State Routing Protocol. EIGRP tidak mengirimkan link-state packets seperti yang dilakukan oleh OSPF, melainkan
melakukan update routing information layaknya RIP maupun IGRP. Di sisi lain, EIGRP melakukan sinkronisasi routing tables antara router-router tetangga setiap kali
Router melakukan startup dan mengirimkan update yang spesifik hanya jika topologi jaringan mengalami perubahan.

CONOTH KONFIGURASI EIGRP:

LAN A :

IP 20.20.20.2
 Subnet Mask 255.0.0.0
 Gateway 20.20.20.1

LAN B :

IP 198.100.100.2
 Subnet Mask 255.255.255.0
 Gateway 198.100.100.1

LAN C :

IP 150.140.140.2
 Subnet Mask 255.255.0.0
 Gateway 150.140.140.1

LAN D :

IP 135.135.135.2
 Subnet Mask 255.255.0.0
 Gateway 135.135.135.1
ROUTER 1 : fast ethernet 0/0 : 20.20.20.1 serial 0/0/0 :140.140.140.1 serial 0/0/1 : 200.200.200.1
ROUTER 2 : fast ethernet 0/0 : 198.100.100.1 serial 0/0/0 :140.140.140.2 serial 0/0/1 : 10.10.10.1
ROUTER 3 : fast ethernet 0/0 : 150.140.140.1 serial 0/0/0 :10.10.10.2 serial 0/0/1 : 7.7.7.1
ROUTER 4 : fast ethernet 0/0 : 135.135.135.1 serial 0/0/0 :200.200.200.2 serial 0/0/1 : 7.7.7.2 Konfigurasinya adalah sebagai berikut :
ROUTER 1 : router# configure terminal router(config)#hostname router1 router1(config)#interface fastethernet0/0 router1(config-if)#ip address 20.20.20.1 255.0.0.0 router1(config-if)#no shutdown router1(config-if)#exit router1(config)#interface serial0/0/0 router1(config-if)#ip address 140.140.140.1 255.255.0.0 router1(config-if)#no shutdown router1(config-if)#exit router1(config)#interface serial0/0/1 router1(config-if)#ip address 200.200.200.1 255.255.255.0 router1(config-if)#clock rate 64000 router1(config-if)#no shutdown router1(config-if)#exit router1(config)#router eigrp 10 router1(config-router)#network 20.0.0.0 router1(config-router)#network 140.140.0.0 router1(config-router)#network 200.200.200.0 router1(config-router)#exit router1(config)#exit
ROUTER 2 : router# configure terminal router(config)#hostname router2 router2(config)#interface fastethernet0/0 router2(config-if)#ip address 198.100.100.1 255.255.255.0 router2(config-if)#no shutdown router2(config-if)#exit router2(config)#interface serial0/0/0 router2(config-if)#ip address 140.140.140.2 255.255.0.0 router2(config-if)#no shutdown router2(config-if)#exit router2(config)#interface serial0/0/1 router2(config-if)#ip address 10.10.10.1 255.0.0.0 router2(config-if)#clock rate 64000 router2(config-if)#no shutdown router2(config-if)#exit router2(config)#router eigrp 10 router2(config-router)#network 198.100.100.0 router2(config-router)#network 140.140.0.0 router2(config-router)#network 10.0.0.0 router2(config-router)#exit router2(config)#exit
ROUTER 3 : router# configure terminal router(config)#hostname router3 router3(config)#interface fastethernet0/0 router3(config-if)#ip address 150.140.140.1 255.255.0.0 router3(config-if)#no shutdown router3(config-if)#exit router3(config)#interface serial0/0/0 router3(config-if)#ip address 10.10.10.2 255.0.0.0 router3(config-if)#no shutdown router3(config-if)#exit router3(config)#interface serial0/0/1 router3(config-if)#ip address 7.7.7.1 255.0.0.0 router3(config-if)#clock rate 64000 router3(config-if)#no shutdown router3(config-if)#exit router3(config)#router eigrp 10 router3(config-router)#network 150.140.0.0 router3(config-router)#network 10.0.0.0 router3(config-router)#network 7.0.0.0 router3(config-router)#exit router3(config)#exit
ROUTER 4 : router# configure terminal router(config)#hostname router4 router4(config)#interface fastethernet0/0 router4(config-if)#ip address 135.135.135.1 255.255.0.0 router4(config-if)#no shutdown router4(config-if)#exit router4(config)#interface serial0/0/0 router4(config-if)#ip address 200.200.200.2 255.255.255.0 router4(config-if)#no shutdown router4(config-if)#exit router4(config)#interface serial0/0/1 router4(config-if)#ip address 7.7.7.2 255.0.0.0 router4(config-if)#clock rate 64000 router4(config-if)#no shutdown router4(config-if)#exit router4(config)#router eigrp 10 router4(config-router)#network 135.135.0.0 router4(config-router)#network 200.200.200.0 router4(config-router)#network 7.0.0.0 router4(config-router)#exit router4(config)#exit

Diatas tadi merupakan konfigurasi dari Router yang menggunakan Routing Protocol EIGRP. Kita dapat melihat diatas, bahwa masing-masing Router memiliki Autonomous System (AS) yang sama, yaitu 10. Yang menandakan bahwa Router-Router tersebut berada dalam satu lingkup yang sama. Apabila kita membandingkan dengan konfigurasi menggunakan Routing Information Protocol (RIP), pada EIGRP ini, kita tidak perlu menuliskan lagi Network-Network yang terhubung pada Router-Router tetangga, karena pada EIGRP ini, akan mencari sendiri Routing Table dari Router tetangganya. Selain itu juga EIGRP dapat mengatasi masalah pada RIP dalam hal keterbatasan jumlah hop maksimum yang dimiliki oleh RIP.