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June 23rd, 2011 in LabSim Go to comments


9tut.net company has decided to network three locations to improve efficiency in inventory control. The routers have been named to reflect the location: Boston, Frankfurt, Lancaster.


The necessary networking has been completed at each location, and the routers have been configured with single area OSPF as the routing protocol. The Boston router was recently installed but connectivity is not complete because of incomplete routing tables. Identify and correct any problem you see in the configuration.

Note: The OSPF process must be configured to allow interfaces in specific subnets to participate in the routing process.

You can download this lab and open with Packet Tracer here: http://www.9tut.net/download/OSPF_Sim_with_Solution.zip. Please say thanks to Renan who shared the files with us!

Answer and Explanation:

The question mentioned Boston router was not configured correctly or incomplete so we should check this router first. Click on PC-B to access the command line interface (CLI) of Boston router.


Boston>enable (type cisco as its password here)

Boston#show running-config



First, remember that the current OSPF Process ID is 2 because we will need it for later configuration. Next notice that in the second “network” command the network and wildcard mask are and which is equivalent to in term of subnet mask. Therefore this subnetwork’s range is from to but the ip address of s0/0 interface of Boston router is which don’t belong to this range -> this is the reason why OSPF did not recognize s0 interface of Boston router as a part of area 0. So we need to find a subnetwork that s0 interface belongs to.

IP address of S0 interface:

Subnet mask: /30 = 1111 1111.1111 1111.1111 1111.1111 1100

Increment: 4

Network address (which IP address of s0 interface belongs to): (because 4 * 1 = 4 < 5)

Therefore we must use this network instead of network

Boston#configure terminal

Boston(config)#router ospf 2

Boston(config-router)#no network area 0

Boston(config-router)#network area 0


Boston#copy running-config startup-config

Finally, you should issue a ping command from Boston router to Lancaster router to make sure it works well.


Other lab-sims in ICND2 Exam:

ICND 2 – Nat Sim Question

VTP SIM (on 9tut.com)

EIGRP Lab sim (on 9tut.com)


Other lab-sims might appear in the real ICND 2 exam, read and understand them if you have enough time.

Comment pages
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  1. OSPF sim commands not working
    December 5th, 2014


  2. ThisKid
    December 16th, 2014

    Thanks Renan!

  3. Koke
    January 2nd, 2015

    Can someone please confirm if this SIM is still valid on the new ICND2.

  4. Rafael ccent
    January 18th, 2015

    I will let you know KOKE i
    am taking the test on the 20th of january 2015

  5. surfsup
    January 24th, 2015

    can anyone confirm that this is the same ospf sim with the same ip addresses? sitting exam soon.

  6. Mr.Paul
    January 27th, 2015

    no one has pointed out that you can just do a show run on router Frankfurt to get the ospf adjacency.
    you still have to remove the network but it is a lot quicker.

    router ospf 2
    network area 0
    network area 0
    network area 0

  7. AZ
    February 3rd, 2015

    I purchased Latest Dumps ICND 1 & 2 100-101 with 202 Q&A and 200-100 with 95 Q&A.
    100% valid and Latest. By just preparing this material, you can get full marks and in exam no unseen question will come.

  8. HR
    February 4th, 2015

    I appreciated to Renan

  9. Sakhi
    February 4th, 2015

    Please tell me friends….i heard that after 29th January 2015 the ccna exam course will b change…is it true ??????

  10. Victor
    February 6th, 2015

    Yea it seems it is true. I failed today. I think it is approximately 40% of the questions that were completely new ones.

  11. Zain
    February 8th, 2015

    ICND 2 exam changed today. new dumps contains 149 Q&A.
    I purchased latest today and have all latest material that is needed to pass this exam easily.

  12. MCisco
    February 8th, 2015

    Hi Zain!!
    I have ICND 2 exam next Thursday. Can you help me with the vce file. Thanks very much.

  13. CENT
    February 8th, 2015

    can anyone plz tell me the type of question in the test as i m new to this and will appearing first time for icnd1 .
    if anyone have icnd1 dumps kindly to share at my email humairas@gmail.com

  14. moha
    February 9th, 2015

    thnx Renan

  15. Ajmal
    February 10th, 2015

    Hello Everyone, Please can you send me the latest dumps for 200-120 at ajmal.consult@gmail.com. Much appreciated :)

  16. BR
    February 14th, 2015

    Hello Everyone, can someone please send me the latest dumps for 200-120 at brbyfar@yahoo.com?

  17. Anonymous
    February 17th, 2015

    hi all
    can any body tell us more about ospf lab ?
    thank you

  18. K4l-eL
    February 18th, 2015

    Thanks Renan!

  19. ali
    February 19th, 2015

    hi all
    is ospf lab as 9tut icnd2 lab or any change ?
    thank you

  20. Anonymous
    February 23rd, 2015

    thanks renan

  21. Anonymous
    February 26th, 2015

    hi zain and all
    can send me the latest dump for icnd1 / icnd 2 exam?
    i going to take exam at march

  22. Anonymous
    February 26th, 2015

    hi zain and all
    can send me the latest dump for icnd1 / icnd 2 exam?
    i going to take exam at march

  23. A.
    February 28th, 2015

    Thanks Amigo – Great SIM

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