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TroubleShooting Lab Challenge 3

July 23rd, 2016 in Lab Challenge Go to comments

This lab challenge helps you understand more about DMVPN. Below is the topology for this challenge.


Description about this lab challenge:

+ R1 is working as the DMVPN Hub router while R7 & R8 are working as DMVPN Spokes
+ EIGRP AS 100 is running from R2 to R6
+ R2 to R6 are running BGP AS 65002 while R1 is running BGP AS 65001
+ All iBGP neighbors use loopback0 to establish BGP neighborship

There are 19 tickets waiting you to resolve. Each of them only contains one error. Please read the description of each ticket to see which spoke cannot communicate with the Hub to have better troubleshooting strategy.

Ticket 1 Ticket 2 Ticket 3 Ticket 4 Ticket 5 Ticket 6 Ticket 7 Ticket 8 Ticket 9 Ticket 10
Ticket 11 Ticket 12 Ticket 13 Ticket 14 Ticket 15 Ticket 16 Ticket 17 Ticket 18 Ticket 19  

Note about NHRP: In some tickets a ping from R7 to R8 (and vice versa) may fail but the NHRP is still working fine on the local router. This is because NHRP only needs to reach the Hub from the local Spoke (while the path from the Hub to the other Spoke may fail). For example, if something goes wrong on R3, NHRP is still working correctly on R8 (although a ping from R8 to R7 fails) because NHRP only needs to go through from R8 to R1 (Hub).

Comments (51) Comments
  1. RAD
    August 9th, 2016

    Hi, I just would like to state that ticket 11 has an error. It’s obvious that the answer is R6, BGP, change neighbor from to, but when we click on “done” it says it’s incorrect.



  2. rstut
    August 11th, 2016

    @RAD: Thanks for your detection. We have just fixed it.

  3. SAM
    September 18th, 2016

    Ticket 3 wrong answer choice “nhrp map” we need to fix it to reflect the configuration of R7 ip

  4. rstut
    September 20th, 2016

    @SAM: Thanks for your detection. We updated that ticket.

  5. Gbgreat
    October 25th, 2016

    “ppp ipcp route default” can someone please explain this command to me.

  6. youness
    October 28th, 2016

    tut is doing a good job in helping people pass thier exam
    God bless you

  7. youness
    October 28th, 2016

    traceroute not supported

  8. Rahul
    December 22nd, 2016

    God bless you

  9. Gorgugnaw
    December 28th, 2016

    Thanks a lot Guys !
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  10. park gu sam
    January 13th, 2017

    Tank you~!

  11. 똥구뇽
    January 13th, 2017

    ttong ggu nuyoon

  12. Azim
    January 24th, 2017

    Ticket-7: What is the difference for Q3 answer, I have seen both answers are same, correct me if I am wrong.

  13. Dalu
    January 31st, 2017

    Ticket 7 needs to be corrected

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    February 9th, 2017

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  15. joearch
    February 13th, 2017

    Pretty sure ticket 4 is incorrect. Seems R6 under eigrp 100 has “passive-interface S1/0” which will stop EIGRP updates down to R8. Can’t ping anything above R6 S1/0 interface. However, no choice exists for R6 to remove the passive interface S1/0 command.

  16. Alexey
    February 14th, 2017

    Could you tell me please if this lab somehow correlates with the real Exam? is this sort of real lab taken from the exam or tut has made it up?

  17. Tebabel Ethiopia
    March 6th, 2017

    Ticket 4 is correct. Since R8 is not in the EIGRP domain, there is no need to advertise routing updates to R8. So the passive interface command is ok.The proble is , there is no correct static route to the inteface address of the DMVPN HUB(R1).
    Remove the route to and add static route for

  18. Tebabel Ethiopia
    March 6th, 2017

    Sorry. Answer is:
    Ip routing
    Remove the route to and add static route for

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    August 21st, 2017

    Can anyone please share the answers of all tickets. Please

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    August 22nd, 2017

    Can anyone please confirm what is the difference bet ticket 2 and 4 why solution is different

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