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CCNA EIGRP LAB Question

January 25th, 2014 Go to comments

Question

After adding R3 router, no routing updates are being exchanged between R3 and the new location. All other inter connectivity and Internet access for the existing locations of the company are working properly.

The task is to identify the fault(s) and correct the router configuration to provide full connectivity between the routers.

Access to the router CLI can be gained by clicking on the appropriate host. All passwords on all routers are cisco.

IP addresses are listed in the chart below.

ccna_eigrp_sim

R1
Fa0/0: 192.168.77.33
S1/0: 198.0.18.6
S0/1: 192.168.60.25
S0/0: 192.168.36.13
R2
Fa0/0: 192.168.60.97
Fa0/1: 192.168.60.113
S0/0: 192.168.36.14
R3
Fa0/0: 192.168.77.34
Fa0/1: 192.168.60.65
Fa1/0: 192.168.60.81
R4
Fa0/0: 192.168.60.129
Fa0/1: 192.168.60.145
S0/1: 192.168.60.26

Answer and explanation

(Note: If you are not sure how EIGRP works, please read my EIGRP tutorial: http://www.9tut.com/eigrp-routing-protocol-tutorial. Note: You can download this sim to practice here: http://www.9tut.com/download/9tut.com_CCNA_EIGRP_sim_question.zip)

We should check the configuration of the new added router first because it does not function properly while others work well. From the command line interface of R3 router, enter the show running-config command

ccna_eigrp_sim_show_run

From the output above, we know that this router was wrongly configured with an autonomous number (AS) of 22. When the AS numbers among routers are mismatched, no adjacency is formed.

(You should check the AS numbers on other routers for sure)

To solve this problem, we simply re-configure router R3 with the following commands:

R3>enable (you have to enter cisco as its password here)

R3#configure terminal

R3(config)#no router eigrp 22

R3(config)#router eigrp 212

R3(config-router)#network 192.168.60.0

R3(config-router)#network 192.168.77.0

R3(config-router)#no auto-summary

R3(config-router)#end

R3#copy running-config startup-config

Check R1 router with the show running-config command:

ccna_eigrp_sim_show_run_2

Notice that it is missing a definition to the network R3. Therefore we have to add it so that it can recognize R3 router

R1>enable (you have to enter cisco as its password here)

R1#configure terminal

R1(config)#router eigrp 212

R1(config-router)#network 192.168.77.0

R1(config-router)#end

R1#copy running-config startup-config

Now the whole network will work well. You should check again with ping command from router R3 to other routers!

Modifications:

Maybe in this EIGRP Sim you will see the “passive-interface …” command somewhere in R1 configuration. If the link between R1 to R2; or R1 to R3; or R1 to R4) routers has the “passive interface” then we have to remove it with the “no passive-interface …” command because it prevents EIGRP update from being sent on that interface. But if the “passive interface” is applied to the link between R1 and ISP router like this:

R1:

!
router eigrp 212
passive-interface s1/0
!

then we just leave it. Don’t use the “no passive-interface s1/0″ on R1 because the link between R1 & ISP doesn’t need EIGRP to run on it. A static route from R1 to ISP & “ip default-network” command in R1 are correct so that all the routers (R1, R2, R3, R4) can access the Internet.

(Note: The “ip default-network” command in R1 will advertise the static route of R1 (to go to the Internet) to other routers (R2,R3,R4) so that they can access the Internet too). In the exam you will see these lines in R1 configuration:

!
ip default-network 198.0.18.0
ip route 0.0.0.0 0.0.0.0 198.0.18.5
!

If you want to learn more about “ip default-network” command please read: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094374.shtml

I read recent comments and realized that you will see the “passive-interface” in the link between R1 & ISP router so just leave it.

Note: Also some readers confuse about if we should use the wildcard masks on the “network” statements under EIGRP process or not. For example should we use:

router eigrp 212
network 192.168.77.0 0.0.0.3

The answer is: we can use wildcard masks or not, it does not matter. Not having a wildcard mask does not make the routes conflicting. The “network …” command in EIGRP (and OSPF, RIP) does not means “advertise this network” but means “If I has interface(s) belongs to this network please turn on EIGRP on that interface. Therefore when you don’t use wildcard mask EIGRP will turn on EIGRP on all interfaces that belongs to the network you specify in the “network …” command.

You should only use wildcard mask on EIGRP if you have 2 or more interfaces that belong to the same major networks but you don’t want to run EIGRP on all of them. For example if your router has 2 interfaces whose IP addresses are 192.168.30.1/28 and 192.168.30.17/28 but you only want to run EIGRP on the first interface, you can type “network 192.168.30.0 0.0.0.15″ under EIGRP process.

Other lab-sims on this site:

CCNA Access List Sim

CCNA NAT SIM Question 1

CCNA NAT SIM Question 2

CCNA Frame Relay Sim

CCNA Configuration SIM Question (RIPv2 SIM)

CCNA VTP SIM

CCNA Drag and Drop SIM

CCNA Implementation SIM

 

Comments
Comment pages
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  1. Anonymous
    October 1st, 2013

    @ Anonymous on 9/30 I did too. Not sure what hapened to EIGRP lab but I took about 40 mins. I was sure I failed but was handed a pass.

  2. Tara
    October 1st, 2013

    I found it on gns3 forum. I must say, awesome lab manuals.

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  3. IMRAN KHAN
    October 1st, 2013

    I DID ALL THE LABS CORRECT .. BUT DONT KNOW WHERE IT OT WRONG ..
    I THOUGHT I WILL GET 900+ …..
    BUT I WAS FAILED .. I GOT 788 MARKS :(((((((((((((((((((

  4. IMRAN KHAN
    October 1st, 2013

    rechecking of paper is possible???????

  5. Unlucky Candidate
    October 2nd, 2013

    640-802 exam held on 30 sep 2013:
    The EIGRP lab that came in the exam is completely unseen…not like the one that is here in 9tut. The built in configuration inside the routers were also much different. Indeed did not expect any unseen SIM in the exam….could not solve it and failed the exam….Now I have to prepare for the new syllabus…new exam.

  6. Pooja
    October 2nd, 2013

    I had the same issue with EIGRP lab..It was not not similar this lab..In the lab, connectivity between R1 and ISP was not working and was asked to fix the issue. I checked routers congif and it was running under the given AS no..Also R1′s routing table had default route to the ISP..I couldnt solve the lab,but passed the exam with 900+…

  7. C_Angel
    October 2nd, 2013

    Congrats 2 u all for making it in the CCNA Old Syllabus. Please could anyone direct me to a site similar to 9tut for CCNP exams. Thanks and my Appreciations

  8. etg
    October 2nd, 2013

    helo 9TUT i told in other page i had exam on 9/30/13 but i got access-list problem,and now i have one question which i face in exam and try to solve it let us see wath i answered in exam which is EIGRP question:-
    CCNA.COM has small network that is using EIGRP as its IGP.ALL ROUTERS should be running EIGRP AS number of 221. router campus is also running static routing to the ISP.CCNA.COM has recently adding main router.currently, the main router does not have connectivity to the ISP router.all other connectivity and internet access for the existing locations of company are working property.
    the task is to idetify the fault and correct the router configurations to provide full connectivity between the router.
    acces to the router CLI can be gained by clicking on the apropriate host.

    @@@9TUT, here is the deal i cant draw the picture and in this exam they did not give me some network number as i see in your eigrp qeustion when i put show running-config command i did not see except ip numbers
    pls solve this qoestions i think this is from the new CCNA exam

  9. gotopass
    October 2nd, 2013

    this Lab was the same in my exam today…I passed with 903/1000 number EIGRP its 122. very easy …

  10. etg
    October 2nd, 2013

    @gotopass ,pls tell me how you did this question

  11. raja
    October 6th, 2013

    frndz can u help me about eigrp exams questions?this is only one question here in 9tut

  12. Anonymous
    October 8th, 2013

    @ raja do u still need help on EIGRP? I can tell you what I know but 9tut has explained it clearly anyway. But ask away

  13. LV
    October 14th, 2013

    Some one who finished this exam recently verify the new question in the below like are valid.

    http://www.examcollection.com/cisco/Cisco.Actualtests.200-120.v2013-10-01.by.examtut.278q.vce.file.html

  14. Rex
    October 15th, 2013

    Thanks to 9tut. Passed mine too with 947/1000. Downloaded dumps from 9tut. You guys are doing great
    Thanks
    Rex
    Nigerian from Lagos

  15. Woolrich Nederland
    October 18th, 2013

    Thankfulness to my father who informed me about this website, this web site is really awesome.

  16. Isaac
    October 21st, 2013

    Can to someone send me the latest packet tracer to semwayom@yahoo.co.uk

  17. Pyae Phyo Han
    October 22nd, 2013

    Thanks to 9tut.Today Exam Passed with 958/1000.
    ACL, ACL2 and EIGRP Sim lab in my exam.
    Very Easy…
    Thanks alot

  18. hurraa
    October 25th, 2013

    so what is ‘new location’ in “no routing updates are being exchanged between R3 and the new location. ” in the question? I mean R3 has been added so that is new. What is new location?

  19. Joker
    October 25th, 2013

    Be carefull with R1. I had a network that was not valid in eigrp. I guess it was to mimic a fat finger. I took this out and added the network of the connection to the new router.

  20. Anonymous
    October 28th, 2013

    download latest dumps from
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  21. C_angel
    October 28th, 2013

    Congrats guys for making it in your CCNA Exams.
    Could anyone pliz email me any CCNP site similar to 9tut.com @ chichisolo2006@yahoo.com

  22. fjnr
    November 2nd, 2013

    these dumps are good for final revision but you must study passed the exam with 986/1000 good luck guys

  23. JLK
    November 6th, 2013

    no Passive IS NOT required for this lab on the test. I had this one yesterday and made the above modifications and the network converged. The test is quite easy if you prepare properly. It took me 28 mins and I got a 986/100, after taking it a 2nd time (1st attempt 1 hr, 821/1000 [need 825])

  24. MOHAMMED ISMAIL
    November 6th, 2013

    Hi, I passed ccna with 917 score. All from the dumps. to pass , practice the dumps and labs many times. Read the books at least three times to have a good understanding

  25. Hein Htet Kyaw
    November 13th, 2013

    I won with 958….this question is involved….

  26. Anonymous
    November 14th, 2013

    hello every one con grad c

  27. Anonymous
    November 14th, 2013

    can some one please email me the ccnp witten test all 3 part if any one have it and i am also looking for the ccie routing and switching written test can some one please eamil it tome r.moore01@hotmail.com please thak u guys

  28. Shams
    November 16th, 2013

    Can someone email me the new CCNA 200-120 dumps to shams54@aol.com

    Thank you

  29. usman
    November 18th, 2013

    @etg did you find your solution?

    can anyone tell me are these labs still valid?? or there we might see new lab in the exam??

  30. pet’r
    November 22nd, 2013

    av bin tryn to practice this lab on my pt 5.3…..but i culdn’t open it.

  31. Anonymous
    November 23rd, 2013

    hey … why network numbers here entered without mask …?? and i think it entered in classful form !! ???????????

  32. NorQui
    November 24th, 2013

    Can someone email me the new CCNA 200-120 dumps to israel3301@gmail.com
    Thank you

  33. Jun Hao
    November 25th, 2013

    So when do i add ip default-network and ip route?

  34. Muhammmad ahmad zain
    November 26th, 2013

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  35. Anonymous
    November 28th, 2013

    Hey there..
    I am interested in knowing, which of these simulations are on new exam, and which one are discarded from 640-802 exam?

  36. megahed
    November 29th, 2013

    thnx alot 4 explain>>>

  37. js
    November 30th, 2013

    This lab doesn´t open in Packet Tracer 5.3. What version Works?

  38. aanand
    December 2nd, 2013

    i just passed exam scored 958/1000 … didn’t know which question i didn’t scored….. Thanks to 9tut, examtut…. for the excellent resources …. all the questions (almost) came from here …..
    got ACL1, ACL2, EIGRP…..

  39. C_ANgel
    December 2nd, 2013

    Hi Guys!!
    Pliz cul any1 direct me where to get a similar site like this for CCNP?
    Tanks
    You can send through chichisolo2006@yahoo.com

  40. Ade
    December 4th, 2013

    Just passed my CCNA 200-120 exam. I failed the 640-802 at my first attempt, I was depressed and felt really bad. If you have failed before it is not the end of the world gather yourself and do it again. ACL, ACL2 and EIGRP sim came out.
    http://www.examcollection.com/cisco/Cisco.Actualtests.200-120.v2013-10-01.by.examtut.278q.vce.file.html for valid dumps.

  41. andrew bhandari
    December 13th, 2013

    suppose on the exam , i got EIGRP simulation , so there is some error has to fix which is already made , so all the error has been fixed by me and it work perfect , at the last i saw there EIGRP route also ADVERTISE to ISP

  42. andrew bhandari
    December 13th, 2013

    suppose on the exam , i got EIGRP simulation , so there is some error has to fix which is already made , so all the error has been fixed by me and it work perfect , at the last i saw there EIGRP route also ADVERTISE to ISP , so in this case what is the best practice to do ? remove the network from there which was ADVERTISE to ISP or need to put #command passive interface on it ? OR just leave it as it is ? please just answr it to me because i m going to sit exam on this monday plz mail it to me with valid ansr @ tejen_bhandari@hotmail.com
    thank you very much

  43. gadson@A.B.U Zaria
    December 14th, 2013

    Bless God! Passed Yesterday 1000/1000. Thanks to y’all.
    Pls try to understand don’t memorize!!!.

  44. Kelechi
    December 17th, 2013

    Please I will like to know how I can verify if there is a passive-interface in any of the interface so to know how to remove it

  45. PaPs
    December 19th, 2013

    Passed the exam today, if you have the passive-interface in one of the router and cant get ride of it with the command no passive-interface, just remove the all eigrp one the router (no router eigrp) and add it back with the network and the auto-summary.

  46. anna
    December 20th, 2013

    hey i dont see the default network and the ip route on R1 do i need to configure them ?

  47. Jeff
    December 23rd, 2013

    is this lab accurate?

  48. Sarah
    December 26th, 2013

    Do labs come as it available here ?

  49. Sarah
    December 26th, 2013

    what are the lab topics for new CCNA exam ?

  50. Jeff
    December 27th, 2013

    is this lab accurate? please let me know…

    jeff.bearden@outlook.com

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