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EIGRP GRE Troubleshooting Sim

March 19th, 2018 Go to comments

Refer to the topology below. Your company asks you to identify the issues in Phase 1 EIGRP implementation. You have console access on R1, R2, R3 Branch1 and Branch2 routers. Only use show commands to troubleshoot the issues.


Question 1


R1 routing table does not have any EIGRP learned routes so R1 or the link between R1 & R2 is the most likely problem. We should check if the IP addresses on R1 and R2 are correct or not with the “show ip interface brief” command.


Note: You should check the IP address of R2 E0/0 interface (the interface connected to R1) as well.

Question 2


The “main office” here refers to R2 (and other routers behind it). Check Branch2 with the “show ip route” command:


We can see Branch2 only uses (Branch 1 – the secondary path) to reach R2 and the subnets behind. Branch2 does not use the primary path (directly connected to R2) so there must be a problem with the connection between R2 and Branch2. Check Branch2 router with the “show running-config” command and we can see an access-list is blocking EIGRP packets advertised to Branch2.


Question 3


This issue is same as Question 2 but this time it is R3 which causes the issue. We can check R3 with the “show running-config” command.


Question 4


In this question we should check the local routers to see if these subnets have been advertised or not as there are many issues in the path which prevent these subnets from being shown in the routing tables.

When checking Branch1 router, we notice “network” is missing under EIGRP 200 so answer D is correct.


Comments (50) Comments
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  1. Anonymous
    June 30th, 2018

    Guys am sitting my paper on tuesday, any help

  2. Anonymous
    June 30th, 2018

    Send any help on {email not allowed}

  3. Anonymous
    June 30th, 2018

    serwanga at gmail dot com

  4. Need more Info
    June 30th, 2018

    @9TUT ADMIN For this simlet, do we have not have exact questions that we need to troubleshoot for? Please and Thank you.

  5. Ned more info
    July 1st, 2018

    How do you see the questions and the answer options for this simlet?? How do you guys know if Question 4 is D for the answer?

  6. Dany1
    July 1st, 2018

    Question 4: Answer D is correct and is because “network” is missing under EIGRP 200 . Other answers are correct also, because in router eigrp is not configured “no auto-summary”. EIGRP wil advertised only classful network, not /24 subnet.
    Maybe something is missing in eigrp router configuration (no auto-summary).

  7. val
    July 1st, 2018

    hi to all. im new here, can anyone tell me where are the questions? because i can see only explanations to the questions/

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    July 1st, 2018

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  10. Ibrahim
    July 2nd, 2018

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  11. kamil
    July 2nd, 2018

    i had exam from one week ago many new question.
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    July 3rd, 2018

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  13. aliroish75
    July 3rd, 2018

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    July 4th, 2018

    hello kamil
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  15. likhlifa
    July 4th, 2018


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    July 7th, 2018

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    July 20th, 2018

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    July 28th, 2018


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