Home > Checking Lab Challenge 1 (OSPF)

Checking Lab Challenge 1 (OSPF)

September 5th, 2015 Go to comments

Your customer network is running OSPF. An engineer has just finished network configuration. You are now tasked to check the configuration of the routers and answer some questions about the network operation. Because of security, “show running-config” commands are disabled on R1 and R5.

Note: You are not allowed to configure anything by company policy. The network is operating correctly so just use various “show” commands and “ping” to learn how this network works.


This is the link to access this lab challenge: http://juquitiba.sp.gov.br/?exams=lab_challenges/Checking_Configs_OSPF/

Comments (36) Comments
  1. Hi
    December 8th, 2015

    “show running-config” commands are disabled on R1 and R5.

    Because the command above is disable, I used “show interface” to see the actual configuration. I believe that other can be used.

  2. fudge
    December 31st, 2015

    Love the challenges! The interface is clean, fast and the questions/exercises facilitate practical knowledge without being unnecessarily redundant. I wish some of the “professional” practice sites were so well thought out.

    Cheers and keep up the good work!

  3. Anonymous
    January 5th, 2016

    you can try ” show run all ” or show run

  4. serafo
    January 9th, 2016

    Very good, thanks.

  5. robin
    January 12th, 2016

    Good sim

  6. Z78
    January 13th, 2016

    Perfect lab! Thank you!

  7. Possum
    January 14th, 2016

    This lab was great!

  8. ABN_GH
    January 24th, 2016

    this lab was worth learning.Thanks and keep it up guys

  9. Jamal MOhamed
    January 30th, 2016

    i used “show ip route ” on router 1

    from that i knew the direct connected network and others

    thank you

  10. msal
    February 3rd, 2016

    how i gate the lab

  11. nani
    February 18th, 2016

    Extremely helpful. Thank you.

  12. Jason
    February 19th, 2016

    Where can I find the OSPF pkt file?

  13. 9tut
    February 19th, 2016

    @Jason: We don’t support pkt file for this lab. You just need to type your commands directly to our simulator.

    February 21st, 2016


  15. 9tut
    February 22nd, 2016

    @CISCOTTE: Please click on the “RT” button on the right-side of the simulator to access the CLI of the routers.

  16. Anonymous
    March 2nd, 2016

    Very good questions

  17. serafo
    March 12th, 2016


  18. isazu
    May 22nd, 2016

    On Q: What is the bandwidth of the Serial Connection in R1?
    Answer provided is 1,544 Mbps
    is this a Typo?
    Correct answer is 1,544 Kbps (on R1 #sh int Se1/0)

  19. @Isazu
    June 24th, 2016


    Treat the “,” as a “.” in this case. The “,” is used in place of the “.” in some countries

  20. Trilby
    June 28th, 2016

    please explain me the question : which areas does interfaces on R5 operate in?
    (how does Se1/0 fall in area 0 also??)

  21. irigyel
    June 29th, 2016

    @trilby you can use “show ip ospf inter” to see which area r5 operate on each one of its interface. S1/0 was configured to be in area 0

  22. Trilby
    July 6th, 2016

    @irigyel : hello, i run the command and it says that se1/0 is in area 125. Can u pls explain me. I m new to OSPF and i m stuck with the question.

  23. karim
    August 15th, 2016

    Hi Everyone,

    Where should I find the configuration of this topology? I’m new. I don’t know how to solve these challenges.

    Please help.

  24. bite`me
    August 16th, 2016


    There’s no configuration on this lab sim, you just need to troubleshoot based from the question. You can only use the “show run” “show ip protocols” and “show ip int br” and also “ping” to verify the routers if its working.

  25. bite`me
    August 16th, 2016


    rather “show ip route”

  26. RiskaN
    September 18th, 2016

    hi all

  27. RiskaN
    September 18th, 2016

    i need 200-125 dumps please help me my email id : riskan000 @ gmail.com

  28. Meo
    December 20th, 2016

    Nice challenge, thank you for your time for creating this material.

  29. Anonymous
    January 16th, 2017

    All commands needed are below

    show ip route
    show ip ospf int
    show ip ospf database


  30. CCNA Master
    March 20th, 2017

    This lab is awesome for newbies :D

  31. CCNA_candidate
    August 13th, 2017

    please send me 200-125 dumps @ bts 10200 @ gmail.com

  32. Kin
    February 26th, 2018

    Question 8 what type of OSPF network on the serial connection of R4? Using the command ” show ip ospf int s1/0 ” it shows the network type is ” POINT_TO_POINT” but in the response 9tut says its ” PONT_TO_MULTIPONT”. I am bit confused. How did you see POINT-TO-MULTIPOINT??

  33. Ivan
    March 18th, 2018

    KIn Check 9 tut again it is Point to Point as stated

  34. Omar
    April 7th, 2018

    Very good Lab, thanks a lots.

  35. zsolt
    May 6th, 2018

    Could you please send me the latest questions of CCNA? I will take the exam next week.
    Thank you.

  36. JJ
    July 11th, 2018

    Question: “What is the bandwidth of of the Serial connection on R1?”

    Answer(from this lab): 1,544 Mbps – I believe this answer is wrong.

    Command ‘show interfaces s1/0’ indicates the Bandwidth is: 1,544 Kbps = 1.544 Mbps
    *Correct Answer should either be: 1.544Mbps OR ~2Mbps

    Please advise.
    Thank You.

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