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Troubleshooting Lab Challenge 2

June 6th, 2015 in Lab Challenges Go to comments

Troubleshooting Lab Challenge 2:

Note: We created this lab challenge to help you get some practice with networking problems only. These labs are only for fun and do not appear in the TSHOOT exam.


Recently our corporation has just acquired some companies. Our networking engineers are working to merge their networks into ours. An engineer has edited the network configuration and now our users are experiencing network issues. They have contacted you to resolve the issues and return the network to full functionality.

Below are the IPv4 Layer 3 Topology and IPv6 Topology (No switch is used in this challenge so we don’t have a Layer 2 Topology):




To troubleshooting effectively you should understand how this network operates. We summarize it as follows:

+ OSPF process 1 is running between R1, R2, R3, R4 and R5
+ RIP version 2 is running between R2 and R6
+ EIGRP AS 10 is running between R3, R7 and R8
+ Redistribution is configured on R2 & R3 to exchange OSPF, RIP and EIGRP information
+ R5 is connected to an Internet Service Provider (ISP) via BGP 65002. R5 is also providing NAT translation between inside networks ( & and outside network ( &
+ R5 is connected to the OSPF backbone area via a OSPF virtual-link. It is a temporary solution for merging them
+ Two access-lists are applied on R5 to increase security for the inside networks
+ Users are allocated prefixes of & They are represented by Client 1 & Client 2
+ R1, R2 and R3 are connected via DMVPN (this is a new topic in the ROUTEv2 exam. If you don’t understand about DMVPN and NHRP, please ignore ticket 14 & 15.)
+ For security reason, the network between R4 & R5 ( is hidden from all other routers via a filter-list on R4.
+ In the IPv6 Topology R1, R3, R4 and R5 are running OSPFv3 AS#10 while R3 and R8 are running RIPng. Redistribution is performed on R3 so that these two IPv6 routing protocols can see each other.
+ Traceroute commands are not supported in this challenge (that would make the challenge too easy)

There are 15 tickets waiting for you to resolve. Each ticket only contains one error. Below are the links to access them:

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  

We hope you can solve all these problems. The difficulty of this challenge is same of the TSHOOT exam (for routers only). Please tell us if you like them or not so that we can continue making more in the future.

Note: This lab challenge is run on IOS v15 so “no auto-summary” is the default value and this command is hidden by default.

Comments (30) Comments
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  1. new’here
    February 9th, 2016

    yes Lo0 belongs to ospfv3 and that’s the problem you needed to solve because of wrong redistribution statement. R1 has that route because they belong to the same ospfv3 domain.
    All the best!

    I believe there’s no such thing as vitual tunnel, it’s virtual-link to be exact.

  2. Charles
    February 19th, 2016

    Someone please help me find the actual questions and not just the explanation

  3. Mubi
    February 25th, 2016

    First of All thanks to All mighty God,
    9tut is good website for practice all labs are valid I have cleared 300-135 today.

  4. 7up
    March 2nd, 2016

    What’s the solution to Ticket 3?

  5. APnkand
    March 5th, 2016

    Where is the answer for the tickets …its complex to handle the Tshoot site here ..can some one please tell me how to use this site.

  6. fox
    March 14th, 2016

    Any news about CCIE written R$S dumps ???

  7. Nomi
    March 16th, 2016

    Some One please help me to handle these tickets . I have Planned to take my exam in the comming
    week any one help me.( tshoot 300-135 ) we have to make configuration or just we have to troubleshoot the problem ..Any One please…shall be very thankful

  8. TsilvaBrazil
    March 21st, 2016

    Hello @networktut
    This Lab is very good for exam 300-135.
    I have one question about the exam.
    In exam, we can use the command “traceroute”?
    I think that this command will help me very very..
    Thanks advanced.

  9. networktut
    March 22nd, 2016

    @TsilvaBrazil: In the exam you can only use traceroute at DSW1 (with source and

  10. TsilvaBrazil
    March 22nd, 2016

    Ohh Very Good..
    Thank you @networktut.
    This scenario is identical with the exam?

  11. Nice Job!
    March 23rd, 2016

    Thank you for this really good lab!

  12. TsilvaBrazil
    March 23rd, 2016

    I have one last question.
    How many theoretical questions appear in the exam?

  13. pv
    March 29th, 2016

    Hello all,
    I am a bit lost at the moment. “conf t” (and similar) dont work for me so i cant access the different device configurations to make changes. Show commands work.
    How do you work with these labs? Need a quick kick start please, not sure how to proceed.
    Many thanks for kicking me in the right direction.

  14. pv
    March 29th, 2016

    Doh, sorry to have bothered everyone. Got it now. Not for fixing issues, only for checking and answering on how to fix it…
    Jumped a little bit too quick into the labs without reading the guide.

  15. Imposztor
    March 30th, 2016

    Hy all! I passed my tshoot exam today with 100% score. All I can say is thank you, networktut! :-) As you can read in the comments, the clients no longer get their address via DHCP but statically configured. Beside that, all my questions and tickets were identical to those you can find on this website. And I recommend the PT labs, too. Good luck!

  16. MK
    April 10th, 2016

    Is this web questions are valid?

  17. epsalmist
    April 20th, 2016

    Please provide solutions and explanations to Lab Challenge 2. Its Great but getting stuck with some tickets

  18. YJWAP
    April 20th, 2016

    Can’t seem to resolve Lab Challenge 2 ticket 4 and 6. anyone can explain the troubleshooting steps?

  19. Kurp
    April 24th, 2016

    Ticket 14

    The fact we can’t ping through the VPN tunnel make it confusing.

    Since it’s a full mesh DMVPN, I didn’t think it mattered too much which router was the DR. Plus OSPF will not function if you can’t pass traffic over the tunnel.

    However i did a bit of digging as i wasn’t certain. On the spoke DMVPN, “ip nhrp multicast nbma_address” only allows the tunnel interface to pass multicast traffic to this specific peer. Multicast traffic can only pass spoke to hub and not spoke to spoke. This means the DR must be on the NHS server even though it’s a full mesh VPN.

  20. Peace
    May 1st, 2016

    Good day All – I pass the exam yesterday – every thing is valid in this site 100% I had all the tickets except (DHCP Sevrer, HSRP track, and EIGRP AS {number 2,10,13)

    I had few MCQ and 2 simlets

  21. SAK_BLR
    May 3rd, 2016

    Please provide me with the premium 68q dumps for 300-135. Would appreciate it. Thanks.

  22. SAK_BLR
    May 3rd, 2016

    sak.shariff14 on gmail

  23. Anonymous
    May 18th, 2016

    @YJWAP……for ticket 4 , in OSPF, to reach another that is not available on routing table, we need “default-information originate always”

  24. Anonymous
    May 20th, 2016

    The links above does not work for me, can someone please explain on how to get this lab work
    thanks in advance

  25. Dnserge
    May 24th, 2016

    Hello guys, can someone please send me the dump at {email not allowed}. thanks

  26. ralphy
    June 4th, 2016

    Thanks for the labs networktut!!!!

    very interesting!

  27. virus227
    June 8th, 2016

    ticket 7 is broken

  28. virus227
    June 8th, 2016

    Scratch my first comment. ticket 7 is fine. Helps to fully read the ticket. Ill have to watch out for that bad habit during the exam.

  29. Revenantx
    June 9th, 2016

    Greetz fellow fellows

    I am hoping someone will be kind enough to dump some dumps on me ?

    revenantx at hmamail dot com


  30. Dnserge
    June 11th, 2016

    Can someone send me the dump. ngansop.sergeb at yahoo dot fr

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