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EIGRP Troubleshooting - Scenario

Description: The purpose of this lab is to troubleshoot EIGRP routing protocol and check for connectivity.

Instructions:

1) Assign the IP address of all the devices as given below

Device Interface IP Address Mask
R1 S0
S1
192.168.1.1
192.168.3.1
255.255.255.0
255.255.255.0
R2 S0
S1
192.168.1.2
192.168.2.1
255.255.255.0
255.255.255.0
R3 S0
S1
192.168.3.2
192.168.2.2
255.255.255.0
255.255.255.0

2) Bring all the interfaces to up

3) Configure EIGRP on all the Devices, Use Autonomous System number 112

4) Ping R3 from R1 and R2 you will see ping failure. Issue show running-config command on R3 to check the output. From the output we can observe that R3 router was wrongly configured with an autonomous number (AS) of 12. When the AS numbers among routers are mismatched, no adjacency is formed. (You should check the AS numbers on other routers for sure). All routers in the same network must use the same AS number.

Commands:

On R1:
R1>enable
R1#conf term
R1(config)# router eigrp 112
R1(config-router)#network 192.168.1.0 
R1(config-router)#network 192.168.3.0 
R1(config-router)#exit
R1(config)#exit
R1#

On R2:
R2>enable
R2#conf term
R2(config)#router eigrp 112
R2(config-router)#network 192.168.1.0 
R2(config-router)#network 192.168.2.0
R2(config-router)#exit
R2(config)#exit
R2#

On R3:
R3>enable
R3#conf term
R3(config)#router eigrp 12
R3(config-router)#network 192.168.3.0
R3(config-router)#network 192.168.2.0
R3(config-router)#exit
R3(config)#exit
R3#ping R2
Trying R2
% Destination unreachable; gateway or host down

R3#ping R1
Trying R1
% Destination unreachable; gateway or host down 

R3#show running-config 

Note: Please refer to the CertExams.com Network Simulator software for complete lab with commands. 

 

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