Home > CCNA EIGRP LAB Question

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
1 36 37 38 39 40 77 29
  1. Osman
    September 14th, 2012

    ALHAMDULILAH!! Cleared CCNA today with 898 and THANK YOU 9tut for your wonderful help. Nothing new Sim questions were EIGRP, VTP and ACL2…GOOD BYE & GOOD LUCK to all…

  2. Rahmat
    September 15th, 2012

    All,
    I am from Indonesia .Yesterday alhamdulillah i passed the CCNA exam with 947 points. I have mostly studied the Sekhar dump. This dump is still valid and I have got all the three sims from 9tut. ACL2, VTP and EIGRP.

    Eigrp just check AS number from new router and network statement under Eigrp from main router.
    ACL2 same like 9tut .

    thank 9tut and thank sekhar

  3. Sheraz
    September 15th, 2012

    Hey guy please advise are we not going to use wild mast in eigrp statement?

    Thanks in advance

  4. Fernandes
    September 15th, 2012

    I am from INDIA,
    thank God,
    I passed my exam on sep 14 2012. My score 960.

    The simulation labs were the same as 9tut Eigrp,Vtp ,ACL .

    Thank you so much 9Tut.com.

  5. KoMeY
    September 15th, 2012

    Finally , While testing our connectivity ( ping from R3 to R1 ) We get reply Only when we ping the ip default-network 198.0.18.0 Other show as Request Time Out …

  6. mbox23ron
    September 16th, 2012

    hi im taking the exam on the 18th sep. do i need to configure a wild cardmask on the eigrp?
    thnx

  7. ezuedeen
    September 16th, 2012

    9tut..
    Appreciate if you could create 1 or 2 situations that might have “passive-interface” syntax command at wrong interface configured at R1 or any related router.. this might help understanding for others person. thanks..

  8. Falcon and Snowman
    September 16th, 2012

    I’ve got a question, since I am stuck for two days now. I can ping from R1 [fa0/0] to PC but cant ping from PC to Gateway of R1, although I configured PC as: 192.168.60.98/28 and R1 fa0/0 : 192.168.60.97/28″ Any one can suggest what I’m doing wrong” Please Thanks

  9. Anonymous
    September 16th, 2012

    GREECE
    ————–

    As i see at 9tut there are 3 different labs at CCNA exams.
    That means you choose what to solve OR you have to do all of them ?
    Thank you a lot.
    Are the same for 2012 or do we have changes at labs or at question compare to 1 year ago ?

    Thank you.
    ———————

  10. Ed
    September 16th, 2012

    Hi All,

    I have a question for those who already took the exam.

    When you check for connectivity in the lab sim (ex. eigrp, acl2), what does the exam prompt to say the connection is Ok or failed?

    Is it the same in Packet Tracer, i.e: “Request Timed Out” and “Server Reset Connection” something…?

    Thank you! I’m taking the exam next week. : )

  11. amila
    September 17th, 2012

    hi everybody i have big problem about following sim
    1. host B should be able to access finance web server
    2. all other type of accessing from host B to finance web server should be block
    3. all type of access form core and land to finance web server should be block
    4. all type of access form core and land to public web server should be able

    according to pass4sure dump (662)
    access-list 100 permit tcp host 192.168.86.2 host 172.22.63.17 eq 80
    access-list 100 permit ip any host 172.22.63.18
    access-list 100 deny ip any any

    is this answer correct in the exam ????????

  12. jagzeer
    September 17th, 2012

    @ amila

    1. host B should be able to access finance web server–> did not specify what type of access
    http, ftp, etc…
    1st line should be “access-list 100 permit ip host 192.168.86.2 host 172.22.63.17″
    if…http access or web access is allowed it should be..
    access-list 100 permit tcp host 192.168.86.2 host 172.22.63.17 eq 80

    2nd line is wrong. It should be “access-list 100 deny ip any host 172.22.63.17 eq 80″

    2nd line was to block access not to permit

    3rd line should be “access-list 100 permit ip any any”

    you have interchanged the 2nd and 3rd statement of your acl

  13. jagzeer
    September 17th, 2012

    you have interchanged the 2nd and 3rd statement of your acl—> I mean the permit and deny

    deny should be at the 2nd statement and the permit at the 3rd statement of the ACL. Please refer to the ACL lab since this lab is for eigrp :)

  14. amila
    September 17th, 2012

    @jagzeer
    ok thanks

  15. desperate to pass
    September 17th, 2012

    ithe access list we use is from 100 to 199 is it posible for some one to use above 100 in the exam

  16. Falcon and Snowman
    September 17th, 2012

    I have asked a question YESTERDAY but seems to me NO one knows the answer to that!!!!!!!!!!!!!!!!

  17. MIke
    September 17th, 2012

    @FalcOn

    Double check IP addresses and default gateway of PC.

  18. Falcon and Snowman
    September 17th, 2012

    Many thanks for reply. As I said R1 can ping below PC but PC can not ping back to R1. I have checked IP addresses again and again. OMG its really driving me crazy. PLS reply!

  19. Falcon and Snowman
    September 17th, 2012

    @Mike So Sorry ” I have done it” IP addressing on the PC was of the fa0/1 instead of fa0/0
    How Frustrating it was for the last three days !!! Thanks

  20. MIke
    September 17th, 2012

    @Falcone

    Are you sure that prefix is /28 not /30?

  21. MIke
    September 17th, 2012

    @Falcone

    Ignore my last post ;)

  22. ropam
    September 17th, 2012

    Just cleared my exam with a perfect perfomance (1000/1000)…..GRATITUDES: First and foremost to the almighty God for everythng he has been since i started preparing for this exam abt a year ago! the Todd lamlle (6th edition), this book gave me the foundation i needed and i consider myself one of the fastest subnetting geek thanks to Todd’s chapter on subnetting…then seriously, who wud forget this guy (9tut) thanks alot man,i finished my exam 40 minutes before time thanks to the speed you gave me in simulations…examcollection, thanks alot guys i ddint see any qn that i hadnt met in the dumps before, then the CBT nuggets videos….they cleared (enhanced) all of the concepts i have learned from all of the materials i have already mentioned! thank you all so much…..i will DONATE when i get my credit card! keep the good work going 9tut

    ABOUT MY EXAM:
    I had total of 50 questions….
    Had three simulations….ACL2, same as here at 9tut but modified as the third table of modifications above and i was dealing with host B plus different IP addresses, EIGRP almost the same as here, had to change the AS in router Home 2 from somethng 21 to 221 and add the appropriate networks also i had to delete and add some networks from router Home 1 (central router) and finaly the VTP…same as here just different question to follow the same procedures in resolving
    NB: i ddnt see anythng that i had not come across before

    for any other enquiries find me at ropamson@gmail.com …..best of luck for everybody working on CCNA

  23. amila
    September 17th, 2012

    @ropam
    what are the dump you used???

  24. MrSHAUN8915
    September 18th, 2012

    I failed my exam for a second time within the past two weeks. I’ve been using 9tut & how2pass. What else should I be using? I’m dying here!! It’s also starting to cost a lot paying our of my own pocket ($300). PLEASE HELP!

  25. jagzeer
    September 18th, 2012

    Took the exam today. Got 960

    All sims are the same with 9tuts. Slight modifications. VTP,ACL2,EIGRP

    VTP

    got questions 2,4,6,7 and 8 for VTP

    ACL

    - Host C should be able to use a web browser(HTTP)to access the Finance Web Server
    - Other types of access from host C to the Finance Web Server should be blocked
    – All access from hosts in the Core or local LAN to the Finance Web Server should be blocked
    - All hosts in the Core and local LAN should be able to access the Public Web Server *

    access-list 100 permit tcp host 192.168.33.3 host 172.22.242.23 eq 80
    access-list 100 deny ip any host 172.22.242.23
    access-list 100 permit ip any any

    of course it should be applied to the outbounf of fa0/1

    EIGRP

    incorrect AS number
    same process as 9tut.

    Reference…

    - (Cisco Netwrking Academy) Exploration
    - Dumps -> collisio, Jericho, Sekhar (visit http://www.examcollections.com for the dumps.)
    - Focused on Sekhar
    - 9tut -> very very helpful especially on labs.

    Thanks GOd, 9tut and those who made the dumps.

    Good luck to the aspirants. Good luck!

  26. jagzeer
    September 18th, 2012

    @ MrSHAUN9815

    Study the concept first before the dumps.
    Surely you’ll pass
    exam is very easy if you understand the concept

  27. mrshaun8915
    September 18th, 2012

    @jagzeer

    I felt comfortable with the questions from 9tut, but seems im missing something. Labs im pretty good at. I had same labs both times (eigrp, acl, vtp) vtp i may got one question wrong of the 5 questions it asks. Where its a tricky question about two mac addresses and what ports, could not find any of those no matter what command i used.

  28. mrshaun8915
    September 18th, 2012

    How good are the dumps everyone keeps asking for compared to using 9tut?

  29. MrSHAUN8915
    September 19th, 2012

    Can anyone send me dumps to: CCNAdumpHELP2012@yahoo.com

  30. Anonymous
    September 19th, 2012

    @ mrshaun8915

    got the same question on my vtp lab

    I did the same process in the VTP lab here in 9tut.
    first is you need to figure out the port of the the source mac address and the VLAN it belongs. Next is show vlan and show interface trunks where it will flood all the ports execpt to the port where it originate. That’s it.

    I dont think you’ll fail with just one mistake in the lab.

    visit http://www.examcollections.com for the dumps. Dumbs really help a lot
    I’ll try to send the full version of the VCE in your email.

    You can use “tab” and”?” in the labs. It really works and helps you a lot.
    shortcuts are also working like sh mac, sh run, etc….

  31. jagzeer
    September 19th, 2012

    @ mrshaun8915

    comment above

  32. fafaltg
    September 19th, 2012

    Do you think in EIGRP sim, we have to command the default-informtaion -originate ??? to advertise the route to internet to all other routers??

  33. jef
    September 20th, 2012

    @fafaltg use show run if there is a default route to isp then you dont have to configure it.

  34. jef
    September 20th, 2012

    @MrSHAUN8915 you must read both dumps(sekhar and brar) and 9tut. if you are premium member 9tut maybe you dont have to read dumps.

  35. mrshaun8915
    September 20th, 2012

    thanks all. Currently I’ve only been using free 9tut version & how2pass, but mainly 9tut. I hope the third is the charm. I understand the material for the most part, but get a little nervous. I feel good before taking the exam like I feel I know the stuff least until I get the results of failed. That and its starting to get expensive at $300 per exam. First was free through my school, but now has to come out of my pocket.

  36. ccna_marky
    September 22nd, 2012

    @ mrshaun8915

    Could you please describe to us what happened during on your examination..

  37. melosonic
    September 23rd, 2012

    has anybody taken the exam? have the questions changes? how many new questions? thank you.

  38. Sheraz
    September 24th, 2012

    how about giving command on R1 to advertise the ISP to other neighbours
    R1#config t ip route 0.0.0.0 0.0.0.0 s1/0
    RI#config t router eigrp 212
    R1#config t redistribute static

  39. Jonathan (from Nigeria)
    September 25th, 2012

    Hello all, i want to say Thank God for making me achieve my CCNA yesterday with 894 points. i also want to thank y’all out here for the support. Special thanks to 9tut.com and examcollection.com for the sims and dumps respectively. the sims were ACL2, EIGRP and VTP.
    for those who’ll take the exam sooner or later, I WISH YOU SUCCESS all the way.

  40. kushal arora
    September 26th, 2012

    qus. 4 all tht in this lab they will give subnets and ip adddress or we have to check by “sh ip int brief” ???

  41. Falcon and Snowman
    September 26th, 2012

    This Question was asked here many time and I spend more than an hour going through all the post seems no one has replied to this? I am very keen to hear from Experts PLEASE REPLY.

    Hello All,
    if i use network command with wildcard mask will i get points? please advise..
    * with wildcard mask
    router eigrp 212
    network 192.168.60.0 0.0.0.255
    network 192.168.77.0 0.0.0.255
    no auto-summary
    * without wildcard mask
    router eigrp 212
    network 192.168.60.0
    network 192.168.77.0
    no auto-summary
    please share your experience..

  42. Mike
    September 26th, 2012

    @Falcone and Showman

    I’m no expert but can advice you. In EIGRP wild card bits is optional, when in OSPF you MUST type it. So it’s all depends how your network is configured. In my CCNA exam I checked all routers EIGRP config and found out that all routers didn’t use wild card bits only class full network statement with no auto-summary command. So when I deleted wrong AS I configured back network statement as class full. I don’t really know why we have this option with wild card bits. Got on my exam 1000 points.

  43. Mike
    September 26th, 2012

    Buy the way you will find your answer by watching a video here:
    https://learningnetwork.cisco.com/thread/36836

  44. varun
    September 30th, 2012

    should i use the no auto-summary command on R1 too?

  45. mr major
    September 30th, 2012

    hi can please someone send me the full version of VCE ?sopprusbarbosa@hotmail.com

  46. geedub
    September 30th, 2012

    thanks 9tut for premium — it has helped with preparing for sims — I easily get confused– especially when time is so critical — just practicing the the 2 examples for the sims — has made me speed up — I can now do all six rather fast

  47. Mike
    October 1st, 2012

    @varun

    Yes, you need to check, if it is not configured,

  48. Robert R
    October 2nd, 2012

    took exam yesterday 1-10-2012 this was in exam and as per above so works fine, you have to check all consoles to see what wronter is configured with the wrong eigrp number, my exam host 2 was wrongly configured and needed changed

  49. Román
    October 3rd, 2012

    Regarding SIM **** 9tut.com_CCNA_EIGRP_sim_question_Answered.pkt ***

    It seems that a default route in ISP router is missing for pings R1-R2-R3-R4 -> ISP to work.

    ————————————————————

    ISP(config)#ip route 0.0.0.0 0.0.0.0 198.0.18.6

    ————————————————————

    Could someone confirm that?

    Regards.

  50. Naruto
    October 3rd, 2012

    yup it is missing. you have to add a static default route on isp router for complete connectivity.

Comment pages
1 36 37 38 39 40 77 29
  1. No trackbacks yet.
Add a Comment