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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. pawan
    April 14th, 2013

    @silverstone
    will it work in CCNA exam ??

  2. Erwin
    April 14th, 2013

    CCNA 640-802 will be last day to test Sept 13, 2013 and It will accelerated
    200-120 CCNA v2.Gudluck everyone who are take the exam..

  3. SilverStone
    April 14th, 2013

    @pawan
    yup just follow what 9tut said you will in good hands and follow your heart lol
    when will be your scheduled exam?

  4. pat
    April 15th, 2013

    am doing my ccna exam today in 2hours …any last minute advise? am soo nervous

  5. bouba
    April 16th, 2013

    please can someone send me the latest version of packet tracer at boubachezkamdem@yahoo.fr.
    The one that i have is not taking this lab simulation.
    Thanks in advance

  6. Anonymous
    April 16th, 2013

    @

    bouba

    please download packet tracer 5.3.3 version that is the new version

  7. kafi
    April 16th, 2013

    at last pass ccna exam. 960…..thanks Allah and 9tut…

    very easy. sim are as like as 9tut. there are some change in vtp sim. so for sim you should a right concept eigrp,acl and vtp.

    in vtp full change in q.7 and q.9…………..

    so study

    thanks

  8. Anonymous
    April 16th, 2013

    pls someone send me crack for vce 3.1.1

  9. lorong18geylang
    April 16th, 2013

    congrats kafi!
    what dump did you use?
    how about ur acl and eigrp lab?

  10. SilverStone
    April 16th, 2013

    Congrats to kafi!

  11. Sagar
    April 16th, 2013

    @kafi what was the changes in vtp can you please tell us??

  12. lorikeet
    April 16th, 2013

    @Kafi congratulation and plz share your lab in vtp

  13. jeren7
    April 17th, 2013

    i got exam yesterday and pass 986 thanks a lot 9 tut :) labs were same topic VTP(1,2,4,5,8), ACL2(host b only access hptt all access host b and other deny) EIGRP(112 a.s.) as 9tut. i faced problem with VTP sim because when i wanna to use ” show cdp neighbors” i didn’t show out and if you will have this situation write show and press enter it will come neighbors

  14. Saeed
    April 17th, 2013

    Packet Tracer lab ( http://www.9tut.com/download/9tut.com_CCNA_EIGRP_sim_question.zip) is not working in latest version 5.3.0.0088 version.

    Can anybody tell me in which version is this lab created.

    Regards,

    Saeed

  15. 9tut
    April 18th, 2013

    @Saeed: Please use at least v5.3.3

  16. Anonymous
    April 18th, 2013

    @silver stone

    am still occuring problem in eigrp lab please help me

  17. Anonymous
    April 18th, 2013

    am doing my exam in 24 hrs….sombdy send me the packet tracer to open this eigrp lab sim?
    plmbgs3@gmail.com
    am so nervous

  18. amrit
    April 18th, 2013

    sims are still valid cleared ccna 960 thanks a lot 9tut.

  19. Anonymous
    April 18th, 2013

    @amrit

    will u please tell me the EIGRP lab r explain me y means am failing to do plzzzzzzzzz

  20. Anonymous
    April 18th, 2013

    exam on 20 april any tips for dumps and sims plz

  21. Anonymous
    April 18th, 2013

    @Anonymous

    Kindly plz read dumps carefully

  22. Ghorba
    April 18th, 2013

    Hey Engineers,
    wish me luck next Monday 22-04-2013 for CCNA exam
    I just want to clarify the meaning of a wrong network in R1
    in this example R1 should include networks

    Fa0/0: 192.168.77.33

    S1/0: 198.0.18.6

    S0/1: 192.168.60.25

    S0/0: 192.168.36.13

    when you make show run on R1 you must see all these networks but when you see for example S0/1: 192.168.40.25 you should delete it and create it again like following

    R1(config)#router eigrp 212
    R1(config-router)#no network 192.168.40.0
    R1(config-router)#network 192.168.60.0

    I hope you find it will.
    Wish me luck again :-)

  23. aaa
    April 19th, 2013

    Passed my exam yesterday with 1000/1000 numbers ALLHAMDULLILAH. I got EIGRP ACL2 and VTP lab. Best of luck guys!!!!!!

  24. dj
    April 19th, 2013

    why are we not adding wildcard mask in the command after n/w id?

  25. Ghorba
    April 19th, 2013

    @dj
    in eigrp when you want to add network you should use the command
    network x.x.x.x without wild card mask

  26. Anonymous
    April 20th, 2013

    we can use ?,tab in lab exam

  27. Anonymous
    April 20th, 2013

    pls someone send me vce 3.1.1 crack

  28. Anonymous
    April 20th, 2013

    someone pls send me vce 3.1.1 crack (chrisalom@yahoo.com) thank you so much

  29. Ghorba
    April 21st, 2013

    Passed today 933/1000 Thanks Sekhar.Dump still 100% valid laps (EIGRP,ACL2,VTP) same as 9tut

  30. cassy
    April 22nd, 2013

    was there a scenario of configuring the command “ip default-network”???can this be given in the exam?

  31. Elizon
    April 22nd, 2013

    @ Ghorba

    Next friday i will take my test exam, i’m a little bit concerned about eigrp lab, is necessary the ip default-network x.x.x.x or ip 0.0.0.0 .0.0.0.0 x.x.x.x

    Please advise me

  32. tente
    April 23rd, 2013

    can someone please send the latest dumps to kolly20102001@yahoo.com and how do I get the link to download the Packet Tracer 6, the EIGRP simulation is not working with my present version. Thanks in advance :)

  33. Lia
    April 23rd, 2013

    One could comment more on the LAB EIGRP?

  34. Ahmad D
    April 25th, 2013

    Please can someone send me VCE 3.1.1 crack, thanks
    adukmak@gmail.com

  35. tiyansbaby
    April 25th, 2013

    can i do this in the exam?

    router eigrp 212
    network 192.168.60.64 0.0.0.3
    network 192.168.60.80 0.0.0.3
    network 192.168.77.32 0.0.0.3
    no auto-summary

    adding wildcard bit to be sure. :)

  36. Anonymous
    April 25th, 2013

    @tiyansbaby

    yes u can use ths wildcard and if dnt use also it will wrk man

  37. Anonymous
    April 25th, 2013

    WTF? Okay this is my first time attempting the SIMS and I have no clue what is going on here. The link to download the SIM for practice only open a blank Wireshark page! Can the author email me at don_powell3@yahoo.com. maybe if I figure out the practice SIM it will all make sense but for now its like looking at a “anti-derivative” math equation

  38. Kenya
    April 26th, 2013

    Spike dump valid. sims eigrp, acl2 and vtp same as 9 tut but change of IPs and names. eigrp number was 122 in exam and different IP. VTP same but got 5 questions only. use spike n practice the labs u’ll pass :)

  39. Ruhail Pakistan
    April 26th, 2013

    @ kenya

    kindly tell me

    befor apply no passive interface ….

    did we have to enter this comman
    # router eigrp 212
    #passive interface se2/0 example ……………………. is it right way ????

  40. Ruhail Pakistan
    April 26th, 2013

    @ kenya

    kindly tell me

    befor apply no passive interface ….

    did we have to enter this comman
    # router eigrp 212
    #no passive interface se2/0 example ……………………. is it right way ????

  41. GREEN
    April 26th, 2013

    HI GUYZ Takin the exam in july again am studin thru spike and sekher dumps plis guyz any update

  42. Don from jamaica
    April 26th, 2013

    The EIGRP SIM is killing me. I am confuse whenever I run show running config, I only get:

    R3#show running-config
    Building configuration…

    Current configuration : 635 bytes
    !
    version 12.2
    no service timestamps log datetime msec
    no service timestamps debug datetime msec
    no service password-encryption
    !
    hostname R3
    !
    !
    !
    enable password cisco
    !
    !
    !
    !
    !
    !
    !
    !

    In the answer above is show all a lot more information. I am doing something wrong or did i skip a step. I am literally just learning this stuff with zero prior Cisco experience so please explain like you are explaining to a dummy. Thanks

  43. osama
    April 26th, 2013

    please i need latest. ccna dumb … i’ll be really grateful if anyone cares
    my email elahly_egypt_2000@yahoo.com

  44. Burhan-u-ddin
    April 27th, 2013

    please i need CCNP dumps if any one have ,, i’ll b grareful ,, if any one could sent it to this email add .. burhan.hussaini@live.com

  45. Ahmad
    April 27th, 2013

    I passed exam yesterday 986 marks ,Same Labs EIGRP,ACL 2 ,vlan troubleshooting

    Great work done by 9tuts.
    Use dumbs http://www.examcollection.com spike file with 662 questions
    or for pass4sure go to http://www.rapidshare.com
    Username :ccnadumbs Password :ccnadumbs

  46. itzjohn
    April 27th, 2013

    @ don from jamaica

    when you see –More– that means there more information, just press the spacebar, to allow it to show more information.

  47. nahid ur rauf
    April 27th, 2013

    pray for me. going to do ccna on 3rd of may.
    realy confused. God will help me anyway

  48. Farhan
    April 29th, 2013

    Can some one please send me latest dump mfarhanali@live.com

  49. Steve US
    April 30th, 2013

    I am not 100% sure on this since I am learning the stuff, but it seems that defining EIGRP networks on R3 for 192.168.60.65 and 192.168.60.81 as 192.168.60.0 does not seem correct. If you see other routers they also have 192.168.60.0 networks as well. Like R2 has 192.168.60.97 and 192.168.60.113, thereby routers not know which to forward to.

    suggestion by tiyansbaby April 25th seems more precise.

  50. sam
    April 30th, 2013

    which network should i delete on R1 when meet @ the exam.i need ur reply thanx

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