CertExams.com Simulator Lab Exercises Answers

OSPF troubleshooting lab scenario-1

Description: In OSPF single area, you configure OSPF network with an area ID.The configuration example uses four routers working in area 200.


IP Address Assignment Table

R1-s0 192.168.1.1 255.255.255.0
R2-w0/s0 192.168.1.2

255.255.255.0

R2-w0/s1 192.168.2.1 255.255.255.0
R2-w1/s0 192.168.3.1 255.255.255.0
R3-s0 192.168.2.2 255.255.255.0
R4-s0 192.168.3.2 255.255.255.0

Instructions:

1. Assign IP Addresses on all the devices as per the above table and bring all the interfaces to up state

2. On R1 enable OSPF routing with process 1 and area as 200 for the network 192.168.1.0

3. On R2 enable OSPF routing with process 1 and area as 200 for the network 192.168.2.0 and 192.168.3.0

4. On R3 enable OSPF routing with process 1 and area as 200 for the network 192.168.2.0

5. On R4 enable OSPF routing with process 1 and area as 200 for the network 192.168.3.0

6. Ping R1 from R4, you will see ping failure

7. Ping R2 from R4, you will see ping success (This implies connectivity failure from R2 to R1) 

8. Issue command on R2 to see OSPF database

9. You will see that there is no link state entry for network 192.168.1.0, so enable OSPF routing on R2 for this network

10. Ping R1 from R4, you will see ping success

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

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