IGRP
Having compared and contrasted the various routing protocols, we decided to select Interior Gateway Routing Protocol (IGRP) as out routing protocol because of its use of multiple metrics for best path selection. IGRP was created by CISCO as a replacement for Routing Information Protocol (RIP). Like RIP, IGRP is a distance-vector interior routing protocol, which calls for a router to send all or a part of their routing table to each of there neighbors in a update. However, unlike RIP, IGRP uses metrics like network delay, bandwidth, reliability, and load in order to make routing decision. Also, the implementation of IGRP requires the designation of an Autonomous System (AS) number. An AS is a collection of networks under common administration, sharing a common routing strategy.
Router>enable
Router#config t
Router(config) #hostname MT_SKY1
MT_SKY1(config) #enable secret class
MT_SKY1(config-if) #int e0
MT_SKY1(config-if) #ip address 88.8.0.1 255.255.128.0
MT_SKY1(config-if) #no shutdown
MT_SKY1(config-if) #exit
MT_SKY1(config) #int e1
MT_SKY1(config-if) #ip address 88.6.0.1 255.255.128.0
MT_SKY1(config-if) #no shutdown
MT_SKY1(config-if) #exit
MT_SKY1(config) #int e2
MT_SKY1(config-if) #ip address 88.7.0.1
255.255.128.0
MT_SKY1(config-if) #no shutdown
MT_SKY1(config-if) #exit
MT_SKY1(config) #int s0
MT_SKY1(config-if) #ip address 88.5.128.1 255.255.128.0
MT_SKY1(config-if)#clock rate 56000
MT_SKY1(config-if) #no shutdown
MT_SKY1(config-if) #exit
MT_SKY1(config) #router igrp 105
MT_SKY1(config-router) #timers basic 15 45 60 0
MT_SKY1(config-router) #network 88.8.0.0
MT_SKY1(config-router) #network 88.6.0.0
MT_SKY1(config-router) #network 88.7.0.0
MT_SKY1(config-router) #no metric holddown
MT_SKY1(config-router) #metric maximum-hops 25
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