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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 (39) 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..

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  5. inam
    February 19th, 2019

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

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  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

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    March 7th, 2019

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    March 8th, 2019

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    March 12th, 2019

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    March 16th, 2019

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

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    March 20th, 2019

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    March 22nd, 2019

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    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

  19. george
    March 31st, 2019

    yesterday I passed my CCNA, 850pts (march 29, 2019)
    This lab was on my exam, but with different router configurations, therefore, different answers… so if you understad the topic, don´t have a problem!

  20. Sherifdeen
    April 2nd, 2019

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  21. Bonsu
    April 4th, 2019

    explanation was good on this topic

  22. sebastian Bonsu
    April 4th, 2019

    all the explanations on this topic was excellent and perfect as well but the explanatory Diagrammes are not big enough clear .

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    April 4th, 2019

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    April 12th, 2019

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    April 12th, 2019

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    April 15th, 2019

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  29. bill
    April 15th, 2019

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    April 22nd, 2019

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    April 23rd, 2019

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  33. helon
    April 24th, 2019

    Hello friends, I have failed the CCNA exam a week ago, what are the chances of questions repeating ?

  34. bill
    April 25th, 2019

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  35. Bsqure
    April 29th, 2019

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  36. bill
    April 29th, 2019

    hi all. had my CCNA ICND2 exam today. passed.scored 866. 811 is pass mark.55 questions. i struggled and had real concerns i would fail. loads of new multiple choice questions. EIGRP troubleshoot sim was in it. exact same question and answers as far as I saw. also GRE multilink Sim with tunnel stuff was in it. had different answers, like error within the multi link config. multi link group looked fine, except in one interface where multi link was configured, there was no ip address configured. so i just guessed and chose answer about incorrect ip address in multi link on router. question about tunnel error, had different ip configurations. guessed one or 2 answers as worried i would run out of time. there was one nasty question about AAA/TACACS+ whole page of server config, username and passwords, and asks what outcome of this config will be, user account with local server or RADIUS server?

    saw 3 drag and drops. i didnt pay much attention to drag and drops lol so it gave me trouble. saw new drag and drops that were not in dump, one about cloud service, order in which user requests services from provider. as well as one for difference between LACP and PAGP etherchannel stuff. ended up guessing. also drag and drop about the EIGRP k values, and match them to correct ones. K1, K2, K3,K4/K5 and match to answers like bandwidth, load, reliability, delay, MTU. more guess work.

    ———–

    there was ACL question, asking where to put standard ACL in diagram, if you want PC A to connect to PC c. but want to stop PC B from accessing PC. guessed more or less lol. tried following rule of placing standard ACL as close as possible to destination.

  37. anish
    April 30th, 2019

    Hello all, I had passed my CCNA 200-125 yesterday with 895.
    I would like to thank 9tut for all kind of help.
    The lab questions I faced were OSPF and ACL simulation and VLAN lab.
    I’ld recommend everyone to prepare for OSPF, ACL,VLAN,EIGRP and EIGRP GRE IPV6 OSPF labs to prepare seriously.
    There were many multiple choice questions.Some I remember are :
    Which three statements about the features of SNMPv2 and SNMPv3 are true? (Choose three)
    Which two statements about IPv6 multicast address are true? (Choose two)
    Which two services can be provided by a wireless controller? (Choose two)
    Which value is included in the initial TCP syn message?
    Which two cable specifications can support 1-Gbps Ethernet? (Choose two)
    Which plane handles switching traffic through a Cisco router?
    On which options are standard access lists based?
    Which two facts about configuring EIGRPv6 are true? (Choose two)

    For drag and drop please prepare all the drag and drop that are in 9tut. Single homed,mulltihomed drag and drop were there which are not in 9tut.

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  38. bill
    April 30th, 2019

    in exam there was question: what will stop a pc from receiving ip address from DHCP server?

    -DTP
    -VTP
    -STP
    -802.1Q

    i had no idea so chose 802.1q

  39. Akhundzad
    May 23rd, 2019

    If some one had the latest dump of CCNA 200-125 please sent it to toofan(dot)akhundzada(at)gmail(dot)com

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