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BGP Sim

February 4th, 2017 in Simlets Go to comments

Question

Loopback0 is used for IBGP peering while physical interface address is used for EBGP. Identify the IBGP issues on R1 to R2, R3 and EBGP issues to RA and fix them so that the “show ip bgp” command on R1 will display all loopback interfaces of other routers.

BGP_Topology.jpg

Configs on R1:

This lab is for BGP only so we only need to check BGP section

R1#show running-config
—-output omitted—-
router bgp 64520
network 172.16.1.1 mask 255.255.255.255
neighbor IBGP peer-group
neighbor IBGP remote-as 64550
neighbor IBGP update-source loopback0
neighbor 172.16.2.2 peer-group IBGP
neighbor 172.16.3.3 peer-group IBGP
neighbor 209.165.200.2 remote-as 64525

—-output omitted—-

Solution

We see there are two issues here (two commands in bold), the first one is IBGP issue and the second one is EBGP issue.

R1(config)#router bgp 64520
R1(config-router)#neighbor IBGP remote-as 64520
R1(config-router)#no neighbor 209.165.200.2 remote-as 64525
R1(config-router)#neighbor 209.165.201.2 remote-as 64525

Note:
+ In the second statement we fix the IBGP group to “remote-as 64520” without removing the wrongly configured IBGP group (“neighbor IBGP remote-as 64550”) because if we remove this statement, other related statements of IBGP (three statements “neighbor IBGP update-source Loopback0”, “neighbor 172.16.2.2 peer-group IBGP”, “neighbor 172.16.3.3 peer-group IBGP”) will be removed automatically because IBGP group no longer exists.
+ Also in statement 2 the “IBGP” group must be written in capital. You will receive an error if writing it in lowercase.
+ The IP addresses in the exam are different but the concept is still the same so please read the question carefully

After solving the problem don’t forget to verify with the “show ip bgp” command. You must see all the Loopback interfaces of other routers. Otherwise please check your commands again.

Comments (50) Comments
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  1. Florida
    October 31st, 2018

    @Norishment or any one..
    can you please share pdf with florigor (at) hot mail (dot) com
    Thanks

  2. Anonymous
    November 2nd, 2018

    @Nourishment could you please send me the pdf dh322715 @ gmail.com

  3. Anonymous
    November 2nd, 2018

    Has anyone got Nourishment mcq pdf they could share ? dh322715 @ gmail.com

  4. np
    November 7th, 2018

    would anyone please also help to share the pdf? laukevin545 @ yahoo.com.hk

  5. Tom
    November 12th, 2018

    Hi,
    Could somebody share a new pdf at tommand2018 @ gmail.com?

  6. Anonymous
    November 14th, 2018

    Can anyone pleaaaaaaaaaaaaaaaaaaaaaaaaase send me the pdf of the MCQ, I’m going for the exam next week and this is my last attempt.

    Email: {email not allowed}

  7. Anonymous
    November 14th, 2018

    Can anyone pleaaaaaaaaaaaaaaaaaaaaaaaaase send me the pdf of the MCQ, I’m going for the exam next week and this is my last attempt.

    Mustapha.Midani @@gmail.com

  8. Anonymous
    November 16th, 2018

    Has anyone gotten the pdf???

  9. moyo
    November 17th, 2018

    Please can someone post the HSRP sim. i seemtoonly have d BGP sim

  10. moyo
    November 17th, 2018

    writing in a few hours

  11. Anonymous
    November 19th, 2018

    Above questions are for Moyo

  12. Exam next week -please help
    November 19th, 2018

    I wasn’t able to use the following commands to save my work in this Simlet:

    copy running-config startup-config
    Write memory

    it gives me error message “command not implemented”

    Does anyone had the same experience. advise please and thank you

  13. Exam next week -please help
    November 20th, 2018

    @ NetworkTut

    Please advise regarding my previous question (November-19)

  14. RBS
    November 21st, 2018

    Please if someone got the PDF can send it to bahatis _ rene @ yahoo . com

  15. Anonymous
    November 21st, 2018

    sorry to bahati _ rene @ yahoo . com

  16. Chamonango
    November 22nd, 2018

    @Networktu, Yesterday I failed on exam with score of 7xx!
    On this question the wrong neighbor was 209.165.227.2 remote-as 64525 and not neighbor 209.165.200.2 remote-as 64525. Guys check before appling the configurantion
    On Ticket 4 both serial was on OUTSIDE.
    All multiple_choice_question are new

  17. Habib
    November 25th, 2018

    Please share Dumps in pdf with wazirhabibullah @ yahoo . com
    Anyone to support..

  18. 1980
    November 29th, 2018

    @Chamonango,
    you are nothing but scammer who try to milk someone.
    go f*** yourself

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    December 3rd, 2018

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  20. PingPong
    December 6th, 2018

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  21. aa
    December 18th, 2018

    did anyone take test in December.If so did you get the BGP sim.If so is it the same lab you got in the exam

  22. HSED
    December 19th, 2018

    Passed the exam yesterday the is score 910 , most of questions here is still valid , some of MCQs are out of the questions , if you prepare well you will get the answer easly , BGP and HSRP simlets are included in the exam..

  23. Paguy
    December 30th, 2018

    I Just passed today. All Premium Member content are valid. I had 24 questions in total. 2 simulations (HSRP and BGP simulations), 2 IPv6 tickets, around 9 or 10 IPv4 tickets, and the rest was Q & A. All the 24 questions is in the Premium Member content. But many ping symtoms are differents from the Networktut simulation. Next step CCIE

    Thanks Networktut

    @Networktut: Do you have the Q & A for CCIE written exam ?

  24. yF
    January 8th, 2019

    this question was confusing because the routing table didnt show correctly due to the size of the window. my advice is to do

    1. show ip bgp ( to confirm the output )
    2. enter the fix ( point to the right remote-as number, i didn’t do a delete. i just issue a new line )
    3. then show ip bgp again and compare with the example
    4. enter the faulty command and you will see it goes back to the 1st output
    5. enter the correct command and you will see it changing again.

  25. justme
    February 20th, 2019

    Is it true this is NOT in the test?

  26. awais
    February 20th, 2019

    anyone plz mail me MCQs {email not allowed} ..plz plz

  27. Bgp
    March 11th, 2019

    Hi all,
    The sim is appearing again in the exam.
    Does someone have a strategy/ plan to solve this sim?
    How do I check for the new IPs? Is there a step by step plan/tut?
    Thank you

  28. BGPsim
    March 11th, 2019

    in the exam, how can I login to the router? is there a password? what is the command line to login? do I have to type in “enable” or something? thanks!

  29. BGPsim
    March 11th, 2019

    in the exam will we also get a picture of all the devices and all the IP addresses etc. like here?

  30. BGPsim
    March 11th, 2019

    how did you find out the IP addresses:

    neighbor 209.165.200.2 remote-as 64525
    and
    R1(config-router)#no neighbor 209.165.200.2 remote-as 64525
    ?

  31. BGPsim
    March 11th, 2019

    Can I use SHOW RUN CONF in the exam or not possible?

  32. kitaro
    March 12th, 2019

    Today I have passed the exam and this BGP simlet was in it.

  33. Asb
    March 12th, 2019

    @kitaro

    Congrats. can you explain to us the exam and MCQ?

  34. Anon
    March 20th, 2019

    This was in my test last week.
    @BGPsim you have an explanation of the objective and the diagram above is almost identical. It sims you consoled into R1 and you have to follow the instructions to get logged in. IIRC I show run then was able to run the same commands as above but not relying on memorization as the numbers/IPs could change.

  35. Durk
    April 4th, 2019

    Can someone explain how changing the EBGP neighbor to an IP that I don’t see on the topology solves the problem?

  36. @Durk
    April 5th, 2019

    209.165.201.2 is in the topology. look at RA router.

  37. Omega
    April 6th, 2019

    Please advice do we need to save this configuration in exam.

  38. DD
    April 9th, 2019

    BGP simlet in my exam had this configuration:

    router bgp 64520
    network 172.16.0.0 mask 255.255.255.255
    neighbor IBGP peer-group
    neighbor IBGP remote-as 64550
    neighbor IBGP update-source loopback0
    neighbor 172.16.2.2 peer-group IBGP
    neighbor 172.16.3.3 peer-group IBGP
    neighbor 209.165.200.2 remote-as 64525

    and loopback address is 172.16.1.1/32

    Couldn’t change the network with comand : network 172.16.1.1 255.255.255.255

    Anyone had the same problem?

  39. Sohail
    April 17th, 2019

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    April 17th, 2019

    Need premium account just for 10 days.

  41. Kira
    April 18th, 2019

    @DD

    I have the same problem.

    but just ignore it the most important things is after complete the fix on IBGP & EBGP configuration make sure you sh ip bgp result same as sh ip bgp result given in the scenario.

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    April 20th, 2019

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    April 30th, 2019

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    May 1st, 2019

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    May 8th, 2019

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