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EIGRP Troubleshooting Sim

October 7th, 2014 Go to comments

Question

The topology below is running EIGRP. You are required to troubleshoot and resolve the EIGRP issues between the various routers. Use the appropriate show commands to troubleshoot the issues.

EIGRP_Troubleshooting_Sim_2.jpg

Instead of posting the output of “show run” commands we post here the commands entered on each router to reduce some useless lines. Also you can try solving questions by yourself before reading the answers.

R1:
int lo0
ip address 10.1.1.1 255.255.255.255
int e0/0
ip address 192.168.16.1 255.255.255.0
int s1/1
ip address 192.168.13.1 255.255.255.0
bandwidth 1000
int s1/3
ip address 192.168.12.1 255.255.255.0
!
router eigrp 1
network 192.168.12.0
network 192.168.13.0
network 192.168.16.0
R2:
int lo0
ip address 10.2.2.2 255.255.255.255
int e0/0
ip address 192.168.123.2 255.255.255.0
int s2/1
ip address 192.168.12.2 255.255.255.0
!
router eigrp 1
network 10.2.2.2 0.0.0.0
network 192.168.12.0
network 192.168.123.0
R3:
int lo0
ip address 10.3.3.3 255.255.255.255
int e0/0
ip address 192.168.123.3 255.255.255.0
int s2/1
ip address 192.168.13.3 255.255.255.0
!
router eigrp 1
network 10.3.3.3 0.0.0.0
network 192.168.13.0
network 192.168.123.0
R4:
int lo0
ip address 10.4.4.4 255.255.255.255
int lo1
ip address 10.4.4.5 255.255.255.255
int lo2
ip address 10.4.4.6 255.255.255.255
int e0/0
ip address 192.168.123.4 255.255.255.0
!
router eigrp 2
network 10.4.4.4 0.0.0.0
network 10.4.4.5 0.0.0.0
network 10.4.4.6 0.0.0.0
network 192.168.123.0
R5:
int lo0
ip address 10.5.5.5 255.255.255.255
int lo1
ip address 10.5.5.55 255.255.255.255
int e0/0
ip address 192.168.123.5 255.255.255.0
!
router eigrp 1
network 10.5.5.5 0.0.0.0
network 10.5.5.55 0.0.0.0
network 10.10.10.0 0.0.0.255
network 192.168.123.0
R6:
int lo0
ip address 10.6.6.6 255.255.255.255
int e0/0
ip address 192.168.16.6 255.255.255.0
!
router eigrp 1
network 10.6.6.6 0.0.0.0

Note: In the exam, this sim uses IOS version 15 so “no auto-summary” is the default setting of EIGRP. You don’t have to type it.

You can download the pkt file to practice here: http://www.9tut.com/download/9tut.com_CCNA_EIGRP_Troubleshooting_Sim.zip

Question 1

Explanation

On R4 we see EIGRP is configured with AS 2 (router eigrp 2) while other routers are using AS 1 (router eigrp 1). Therefore R4 cannot see other routers and vice versa.

Question 2

Explanation

For this question we have to check the routing table of R1 to find out the answer. Use the “show ip route” command on R1 we will get something like this:

ccna_EIGRP_Troubleshooting_sim_R1_show_ip_route.jpg

There are three interfaces on R5 which are Loopback0: 10.5.5.5 ; Loopback1: 10.5.5.55; Ethernet0/0: 192.168.123.5 and all of them are advertised via 192.168.12.2 so we can conclude traffic from R1 to R5 goes through R2 (192.168.12.2 is the IP address of S2/1 interface of R2).

Note: Maybe there is another version of this question in the exam in which the answer should be “The traffic is equally load-balanced over R2 and R3”. Therefore please check the “show ip route” output carefully to see if there are more than one route to the destination.

Question 3

Explanation

From the configuration of R6 we learn that R6 is missing “network 192.168.16.0” command (the network between R1 & R6) under EIGRP so EIGRP neighbor relationship will not be formed between them.

Note: Please check the configuration of R6 carefully. If the “network 192.168.16.0” is not missing on R6 but the “metric weights” is configured like this:

R6:
router eigrp  1
 network 10.6.6.6 0.0.0.0
 network 192.168.16.0
 metric weights 0 0 0 1 1 1

Then you should check if R1 has the same “metric weights” or not. If not then the answer should be “K values are mismatched”.

For your information, EIGRP K values are the scale numbers that EIGRP uses in metric calculation . Mismatched K values can prevent neighbor relationships from being established. The syntax of “metric weights” command is:

metric weights tos k1 k2 k3 k4 k5 (with tos is the type of service and must always be zero)

Question 4

Explanation

R1 does not advertise its loopback 0 (10.1.1.1) to EIGRP therefore a ping to destination 10.5.5.55 (R5) from 10.1.1.1 will not be successful because R5 does not know how to reply to R1.

Comments (36) Comments
Comment pages
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  1. Precious
    January 26th, 2017

    @ shayeb : On R1 , 4 networks are present 10.1.1.1 , 192.168.16.1 , 192.168.13.1 , 192.168.12.1
    but in the network statement 10.1.1.1 is not advertised , only 3 network were advertised so R5 does not know how to reply !

  2. Leang Kevin
    January 31st, 2017

    Hi, everyone please let me know about some question of EIGRP Troubleshooting Sim, that related to CCNA 200-125.

    Thank you for advance!!!

  3. maria
    February 3rd, 2017

    where are the questions and their options?

  4. @sssd
    February 6th, 2017

    q4
    Why are the pings failing?
    A. The network statement is missing on R5.
    B. The loopback interface is shut down on R5.
    C. The network statement is missing on R1.
    D. The IP address that is configured on the Lo1 interface on R5 is incorrect.

  5. @sssd
    February 6th, 2017

    @maria
    Question 3:
    Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?
    A. The K values mismatch.
    B. The AS does not match.
    C. The network command is missing.
    D. The passive-interface command is enabled

  6. egemen
    February 8th, 2017

    hi please give me a information about ccna and “please send me the latest dump. i need this.
    egemen.eray @ gmail .com

  7. Mikasa
    February 9th, 2017

    anyone who has the questions for this sim? @sssd posted only 2 questions :(

  8. sheff07
    February 9th, 2017

    @sssd can you post the 1st and second questions for this lab too? and also the answers to all (including 3 and 4) of them please? would appreciate.

  9. yuri
    February 9th, 2017

    in this simulation:
    You should add one router on router6 like router eigrp 1 network 192.168.16.0, it work great
    the same on router R1 eigrp1 network 10.1.1.0 for loopback interface

    that is all

  10. kami
    February 12th, 2017

    Can anyone please email me the questions and options of these explanations ?
    kindly mail me on this email address {email not allowed}

  11. kami
    February 12th, 2017

    Can anyone please email me the questions and options of these explanations ?
    kindly mail me on this email address kamiwazir6 @ gmail.com

  12. Where
    February 17th, 2017

    What are the questions? Please share the questions.
    Thank you very much.

  13. Anonymous
    February 18th, 2017

    What are the questions? Please share the questions.

  14. yousab
    February 18th, 2017

    where are the questions?

  15. Q4
    February 20th, 2017

    In the sim i can ping 10.1.1.1 from source 10.5.5.55 successfully, without any changes..
    command is: R5#Ping , you get extended ping commands.

    What are the questions of 1 and 2 and what are the correct answers?

    Thnx for this greatly site, will let you know what the exam is wednesday

  16. KK
    February 21st, 2017

    Where are the questions? Please share the questions???

  17. ZZLL
    February 22nd, 2017

    Hi Guys

    May I ask in the real CCNA exam, do we need to put the “correct” command line into the routers or we just need to do the multiple questions ?

    For example: do we need to put command line to add loopback address on R1?

    Question 4

    R1 does not advertise its loopback 0 (10.1.1.1) to EIGRP therefore a ping to destination 10.5.5.55 (R5) from 10.1.1.1 will not be successful because R5 does not know how to reply to R1.

  18. Question please
    February 22nd, 2017

    guys i can`t see the questions can any body send it !?

  19. Anonymous
    February 26th, 2017

    Which command are used to see k Value’s ?? Can anyone help me Plz ??

  20. Diablon
    February 27th, 2017

    @Anonymous

    You can use “show ip protocols”

  21. KT
    February 28th, 2017

    Can Anyone please share the questions for this lab please??

  22. rastaguru
    March 1st, 2017

    please can somebody share these questions. am writing my exam next 2weeks thanks

  23. eigrpman
    March 2nd, 2017

    Taking the exam in 3 days, I would really appreciate any simlet possible question ideas. Thank you, in advance, kind person.

  24. nomi
    March 4th, 2017

    anyone can send the link for EIGRP Sim?

  25. Questions Request
    March 6th, 2017

    Can anyone write the questions ???

  26. Anonymous
    March 7th, 2017

    Guys, if anyone has the question please your support

  27. nomi
    March 7th, 2017

    Please anyone share the questions

  28. @rain
    March 7th, 2017

    greetings
    can any one list the lab questions pls
    I’ve got the answers but i need the questions here or at email
    {email not allowed}

    thanx

  29. .
    March 12th, 2017

    .

  30. rupok
    March 14th, 2017

    Can Anyone please share the questions for this lab please??

  31. Kyaw Gyi
    March 15th, 2017

    Thanks a lots

  32. Yolo
    March 16th, 2017

    Q.1 The loopback interfaces on R4 with the IP addresses of 10.4.4.4/32, 10.4.4.5/32 and 10.4.4.6/32 are not appearing in the routing table of R5. Why are the interfaces missing?

    A. The interfaces are shutdown, so they are not being advertised.
    B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
    C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
    D. The loopback addresses haven’t been advertised, and the network command is missing on R4.

    Ans: B

  33. Yolo
    March 16th, 2017

    Q.2 Which path does traffic take from R1 to R5?
    A. The traffic goes through R2.
    B. The traffic goes through R3.
    C. The traffic is equally load-balanced over R2 and R3.
    D. The traffic is unequally load-balanced over R2 and R3.

    Ans: A

  34. Yolo
    March 16th, 2017

    Q.3 Router R6 does not form an EIGRP neighbor relationship correctly with router R1. What is the cause for this misconfiguration?
    A. The K values mismatch.
    B. The AS does not match.
    C. The network command is missing.
    D. The passive-interface command is enabled.

    Ans: C

  35. Yolo
    March 16th, 2017

    Q.4 Study the following output taken on R1:

    R1#ping 10.5.5.55 source 10.1.1.1
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 10.5.5.55, timeout is 2 seconds:
    Packet sent with a source address of 10.1.1.1
    . . . . .
    Success rate is 0 percent (0/5)

    Why are the pings failing?
    A. The network statement is missing on R5.
    B. The loopback interface is shut down on R5.
    C. The network statement is missing on R1.
    D. The IP address that is configured on the Lo1 interface on R5 is incorrect.

    Ans: C

  36. StandbyIsUnknown
    March 21st, 2017

    im starting to use 9tut nd i dn,t see questions just explanations ??

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