Free Cisco CCNA Lab – IGRP II

Configuring IGRP & Verifying Connectivity Lab  

These labs are not as good as the labs in our full blown CCNA Lab Workbook.  The labs in our full blown CCNA lab workbook include theory as we step you through each lab, detailed information on why you are entering each command and review questions and answers at the end of the labs.  So these labs are ok for free…but we offer a much better product consisting of 60 labs covering 400 pages of CCNA material to help you pass your CCNA Certification Exam in the workbook at this link CCNA Lab Workbook!

Objective: In this lab, you will configure IGRP on all three routers. This will allow your routers to route packets so that all routers and all hosts will be able to reach (ping) each other. Once your configuration is complete, you will use basic techniques to test your network’s connectivity. Note:  Some ask why have a IGRP lab when it is no longer on the exam.  Simply because the way to configure IGRP is very similar to EIGRP and other dynamic routing protocols and it provides you great experience!  Who knows, maybe your next company still uses it.

Hardware Requirements

• One router with two serial ports

• Two routers with one serial port and one Ethernet port

• Two back to back DTE/DCE serial cables

• IOS version 12.x or later

• A PC running a terminal emulation program

• Cisco console kit

Setup

• Configure the cabling as shown in the network diagram

• If the routers have a startup-config, erase it and perform a reload of the routers.

Configuring Router 1

Router>en

Router#conf t

Router(config)#host R1

R1(config)#int loopback 0

R1(config-if)#ip add 1.1.1.1 255.255.255.255

R1(config-if)#no shut

R1(config)#int e0

R1(config-if)#ip add 10.1.1.1 255.0.0.0

R1(config-if)#no keepalive

R1(config-if)#no shut

R1(config)#int s0

R1(config-if)#ip add 192.168.1.1 255.255.255.0

R1(config-if)#clockrate 64000

R1(config-if)#no shut

R1(config)#int s1

R1(config-if)#ip add 193.1.1.1 255.255.255.0

R1(config-if)#clockrate 64000

R1(config-if)#no shut

R1(config)#router igrp 100

R1(config-router)#network 1.0.0.0

R1(config-router)#network 10.0.0.0

R1(config-router)#network 192.168.1.0

R1(config-router)#network 193.1.1.0

R1(config-router)#end

R1#write

Configuring Router 2

Router>en

Router#conf t

Router(config)#host R2

R2(config)#int loopback 0

R2(config-if)#ip add 2.2.2.2 255.255.255.255

R2(config-if)#no shut

R2(config)#int e0

R2(config-if)#ip add 11.1.1.2 255.0.0.0

R2(config-if)#no keepalive

R2(config-if)#no shut

R2(config)#int s0

R2(config-if)#ip add 192.168.1.2 255.255.255.0

R2(config-if)#no shut

R2(config)#router igrp 100

R2(config-router)#network 2.0.0.0

R2(config-router)#network 11.0.0.0

R2(config-router)#network 192.168.1.0

R2(config-router)#end

R2#write

Configuring Router 3

Router>en

Router#conf t

Router(config)#host R3

R3(config)#int loopback 0

R3(config-if)#ip add 3.3.3.3 255.255.255.255

R3(config-if)#no shut

R3(config)#int s0

R3(config-if)#ip add 193.1.1.3 255.255.255.0

R3(config-if)#no shut

R3(config)#int e0

R3(config-if)#ip add 12.1.1.3 255.0.0.0

R3(config-if)#no keepalive

R3(config-if)#no shut

R3(config)#int s0

R3(config-if)#ip add 193.1.1.3 255.255.255.0

R3(config-if)#no shut

R3(config)#router igrp 100

R3(config-router)#network 3.0.0.0

R3(config-router)#network 12.0.0.0

R3(config-router)#network 193.1.1.0

R3(config-router)#end

R3#write

Testing Router 1

R1#sho ip route

(Output omitted)

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

C 1.1.1.1 is directly connected, Loopback0

I 2.0.0.0/8