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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.

Topology.jpg

Question 1

Explanation

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.

R1_show_ip_interface_brief.jpg

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

Question 2

Explanation

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

Branch2_show_ip_route.jpg

We can see Branch2 only uses 192.168.12.1 (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.

Branch2_show_run.jpg

Question 3

Explanation

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.

R3_show_run.jpg

Question 4

Explanation

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 172.16.0.0” is missing under EIGRP 200 so answer D is correct.

Branch1_show_run.jpg

Comments (18) Comments
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  1. LOPI
    February 6th, 2019

    Hey guys.. can anyone tell me why I cant see questions .. i can only see explanations.

  2. Vima
    February 7th, 2019

    Question 1
    Examine the R1 routing table. None of the internal routes other than locally connected appear in the routing table.
    Which cause of the issue is true?
    A. EIGRP neighbor relationship was not formed due to AS mismatch between routers R1 and R2
    B. EIGRP neighbor relationship was not formed due to K values mismatch between routers R1 and R2
    C. EIGRP packets were blocked by the inbound ACL on R1
    D. IP address was misconfigured between the R1 and R2 interface
    Answer: D
    Question 2
    The traffic from Branch2 to the main office is using the secondary path instead of the primary path connected to R2. Which cause of the issue is true?
    A. The network 192.168.11.0/30 was not advertised into EIGRP on Branch2
    B. The IP address was misconfigured between the Branch2 and R2 interfaces
    C. EIGRP packets were blocked by the inbound ACL on Branch2
    D. The primary path has more link delay configured than secondary path which causes EIGRP to choose the secondary path
    Answer: C
    Question 3
    The GRE tunnel between R3 and Branch1 is down. Which cause of the issue is true?
    A. The tunnel source loopback0 interface is not advertised into EIGRP in Branch1
    B. The tunnel source loopback0 interface is not advertised into EIGRP in R3
    C. The EIGRP neighbor relationship was not formed due to EIGRP packets blocked by inbound ACL on R3
    D. The EIGRP neighbor relationship was not formed due to the IP address being misconfigured between the R2 and R3 interfaces.
    Answer: C
    Question 4
    You are verifying the EIGRP configurations in the topology. Which statement is true?
    A. Branch2 LAN network 172.16.11.0/24 is not advertised into the EIGRP network
    B. Branch2 LAN network 172.16.10.0/24 is not advertised into the EIGRP network
    C. R3 server farm2 network 10.20.30.0/24 is not advertised into the EIGRP network
    D. Branch1 LAN network 172.16.12.0/24 is not advertised into the EIGRP network
    Answer: D

  3. Anonymous
    February 10th, 2019

    Where is the lab simulation regarding this question?

  4. Anonymous
    February 19th, 2019

    does anyone has last of VCE exam simulation setup with crack ???? could you send me mail please..

    halilalban at outlook dat com

  5. inam
    February 19th, 2019

    i need CCNA R&S dumps plz send to {email not allowed} or call +966566331189

    Regards

  6. PLease Help My Request!!
    February 20th, 2019

    I am not sure when people say they are writing the lab what does that mean and please tell me how to go about it so I can try and write the lab?? Please comment below as I will come back to review how to do it. I would like to use commands in the exam and check for the answer myself so I know why it is the answer it is. I want to learn the material. So Please all help me with this request…

  7. bill
    February 24th, 2019

    hi. if you have the time, you can open packet tracer and copy that sim and set it up. i will not bother, instead will just use 1 or 2 routers in packets tracer and practice commands.

  8. Anonymous
    February 26th, 2019

    what the heck…wheres the pkt tracer lab? how is the question going to ask for me to verify other routers and links when there is no simulation?

  9. bill
    March 6th, 2019

    Anonymous lol. you could always make it yourself in packet tracer

  10. Syed Zeeshan Haider
    March 7th, 2019

    Can anyone share with me the latest dumps for CCNAV3 200-125 exam. My exam is next week. Please help. My email is {email not allowed}

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    March 8th, 2019

    Lasted March 2019 Dumps JNCIA Junos JN0-102 and JNCIS-SP JN0-361.
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  12. Anonymous
    March 12th, 2019

    Anonymous send mail for me, i can share for you

  13. Anonymous
    March 16th, 2019

    please, Can any one send me the last Update for dump CCNA 200-125 I have exam end of this week.

    Email: {email not allowed}

  14. merilon
    March 20th, 2019

    Next week I have CCNA exam please help me.
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  15. Ade
    March 22nd, 2019

    Kindly help with latest dumps.
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  16. Ade
    March 22nd, 2019

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  17. Je’ral
    March 22nd, 2019

    Can someone help me out. I have an issue with an old CISCO ASA that machines are still routing traffic too it. It was the old Gateway but for some reason the Network Engineer who setup the Firewall left the old ip address still as MGT on the new Palo Alto Firewall. Anything you can do ti assist would be helpful.

  18. Raf
    March 24th, 2019

    1. How is the CCNA lab question going to be asked?
    2. Are the 60-70 questions of the CCNA R&S 200-125 going to comprise the Lab questions or the lab questions are separate aside the 60-70 questions of the exam?
    3. How do you solve lab questions on dumps since they are not simulated and you can’t troubleshoot manually
    lastly, in the lab questions above, there are explanations after the questions. Is this exactly how lab questions are set in the CCNA 200-125 exam? I will be grateful if I can get suggestions of websites where I can practice what looks like the real (simulations) exam, for practice and get more knowledge on what the CCNA 200 -125 exam is all about

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