CCNA EIGRP LAB Question
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.
| 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
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:
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 Configuration SIM Question (RIPv2 SIM)
@mariah
check “show ip route” to see if it takes effect.
if not try “ip route 0.0.0.0 0.0.0.0 OUTGOING_INTERFACE”
if that doesnt work then try “ip default-network 198.0.18.0″
then see if it is propagating across the routed domain by verifying the routes table on the neighboring routers
can i have some to answer this question for me please? i do have the habit of using show ip interface brief and use the interface ip address to config the eigrp networks is that ok to use on the exam or i have to use the network address. exam in tow days please answer :0)
xallax: I worked with EIGRP SIMs that are given here. I saw that in show ip route we dont have a static route to ISP and although I know its not a part of this particular task, I wanted to configure it and I did it with the command written above. When I did show ip route, the route was there and everything seemed fine. But still, I cant ping from R3 to 198.0.18.5 for example. What can be wrong? Would I lose points on the exam for this?
@9tut
Yeeeeeeeees i made it CCNA yesterday i got 1000/1000
Thanks alot 9tut.
anyone need latest dumps from pass4sure 631 question updated 16 may 2012.
Just contact me.
Hi, I passed CCNA with 975/1000. Many thanks to 9tut for bringing us such a wonderful resource for preparation. I got all 3 Sims from this site which are VTP, ACL2 and EIGRP.
Here, I’ll tell you about what I got in EIGRP SIM.
1. The routers’ names were changed as well as IPs.
2. On R3, EIGRP AS no. was different so I changed it and add networks.
3. In running-config of R1, I see ‘passive-interface’ command to the link connecting ISP, So I just leave it unchanged and ‘default network’ was present as well.
4. On R1, wrong network statements were present. So have to remove them and add correct statements.
5. After that the EIGRP converged and I see EIGRP routes as well as default route on routers R1,R2 and R3.
6. Pings were successful from other routers to R1 but not to ISP. The question didn’t ask me to establish connectivity to ISP, so I just leave it. On the contrary, applying NAT on R1 would be the only solution.
Good Luck to all for your exam….
@Jaan pls send me latest dumps to sachin.suresh1991@gmail.com
pls dude
hai jaan i need that latest dumps so pleae sent it to my e-mail id “mageshkumar710@gmail.com”.i am awaiting for your reply.
@ccnaguy, it is safe to use show ip interface brief, i used the same in exam
Passed the exam with 986/1000 on 8th june.
Good luck!
Thank you 9tut. Awesome site, I have found explanation to most of my doubts on this site.
Thank you All! Cleared CCNA 986/1000
@Suresh @magesh
I will send you as soon as possible.
passed with 920 thanks God, same sims VTP, eigrp just with AS changed, ACL2 with some differences but mostly as 9tut, 2 or 3 new questions but easy as long as ur concepts are strong…. thanks to 9tut & Collisio dump
Good luck all :) ;)
@mariah
as long as ISP router has no routes back to r1/r2/r3 it cant reply to the pings
@majid
thank you so much for the insight!
@Suresh @magesh
File size is 35 MB i trying to send but its not work. and i have already zip it.
Give me suggestion so how can i send you.
jaan split it like 5 or 6 file then sent it to us
hi jaan:
can u please send to me the eigrp picture/ sim that you are mentioned in your comment last june 4.. thank you so much..will take an exam on june 20..thanks
kits_ace13@yahoo.com
@jaan can you please send me pass4sure 631 @ bobiksnavarro@yahoo.com thank you. i
ll be waiting im taking my exam next week.
@me
Picture is the same as u see this this just they have changed ip addresses.
@dongjuan @magesh @Suresh
Guys i have winrar i dont have any idea how to split it.
Just tell me how to do?
im confused about the configuration of the eigrp , shouldn’t i write the wildcard mask with the network address ??
Hi Jaan,
I need that latest dumps so pleae sent it to my e-mail id “sourabhgupta1981@gmail.com”. I am awaiting for your reply.
Thank you in advance
Hi,
Plz send me the latest dumps my e-mail id: sourabhgupta1981@gmail.com, that would be the biggest help for me.
Thank u in advance.
hi Jaan,
please send me the latest dumps to dasrilsyah.bachtaria@gmail.com, pleasee.. thanks..
Hello Guys !
The new EIGRP Sim Question came in Exame …… I Failed in exam on 02- June-2012 because of that sim Question. If someone can help me to solve this sim? Could be very thanks of that……..
CCNA.com has a samall network that is using EIGRP as its IGP. ALL router should be running an EIGRP AS number of 112. Router Campus is also running static routing to ISP.
CCNA.com has recently adding the Main Router. Currently the Main router does not have connectivity to the ISP router. All other interconnectivity and internet access for the existing location of the company are working properly. This task is to identify the fault and correct the router configuration to provide full connecticity between the router .
Access to the router CLI can be gained by clicking on the appropriate host.
All password on all router are cisco.
Campus
Fa0/0 192.168.22.13
S1/0 192.0.18.6
S0/0 192.168.63.25
S0/1 192.168.40.17
Main
Fa0/0 192.168.22.14
Fa1/0 192.168.36.49
Fa1/1 192.168.36.33
BLD-101
Fa0/0 192.168.36.65
Fa1/1 192.168.36.81
S0/0 192.168.63.26
BLD-102
Fa0/0 192.168.36.97
Fa1/1 192.168.36.113
S0/1 192.168.40.18
please help me sove this question, how you do it my email address is alishabus@msn.com
@Ali
I think it’s not new
@ali
i agree with mike. same question with different sentence construction.
To xallax,
Can you verify.
Thanks in advance.
hello everybody
Please , my exam is after 3 days any body have latest damp or any practice exams or any thing can help in exam Please send it at omran_mostafa@rocketmail.com
and wish good for all
guys question..
if i add the router 3, what if the cable that i is serial cable ( serial interface ) instead of crossover cable ( fastEthernet interface ) will i get wrong answer or will affect my score even i’m get the configurstion right? please answer as soon as possble..thanks
***will i use***
Passed my ccna exam today!!! Praise GOOOOOOOOOOOOOOOOOOOOd!!!!! Simulation questions in the exam EIGRP,VTP Acesslist2, study the simulations !!!! use packet tracer or gns3 and the rest of the questions here until you know the answers, it is better to take at least 4 weeks going through this site before you attempt the exam, unless you are advanced on cisco networking, but if you are a rookie like me, it took me at least 6 weeks to study this site and dumps from examcollection.com, to pass today!
Dumps from www. examcollection.com
Cisco Acme 640-802 v2012-04-18 by Collisio 487q.vce
Cisco ActualTests 640-802 v2012-02-26 by Jericho 632q.vce
dumps from http://www.examcollection.com are accurate, make sure you read the comments to know which dumps are the latest or people have used and pass the exam. Best wishes to all!
hello everybody
Please , my exam is after 3 days any body have latest damp or any practice exams or any thing can help in exam Please send it at glenn_katorse@yahoo.com
and wish good for all
@ Hello Guys!
I have latest Dumps of CCNA 640-802- CCNP 642-813 but problem is file size is to larg.
And i am unable to send through email. Any sugesstion?? so i could help them.
thanks to 9tut,labs are helpful….. scored 867/1000
When we enter these two command lines: R3(config-router)#network 192.168.60.0
R3(config-router)#network 192.168.77.0
Is it needed to type the subnet mask?
Thanks.
@EIGRP
NO mate, you don’t have to type subnet mask, only no auto-summary command.
And DO NOT USE wild card mask too, my friend used it on exam and sim star working really slow+glitches. Do NOT ower think and DO NOT make things complicated.
Cheers
Please give me latest dump of CCNA exam. bappybd02@yahoo.com
hello everyone with the grace of almighty allah and my mom pray i pass ccna and scored 933..
thanx to 9tut…all question from 9tut and labs where eigrp,vtp,and acl2.
eigrp is changed mean the question are same but there requirement are changed they asked that all router is configured correctly but no connectivity with isp so find the fault and provide the connectivity..jst go every router and checked the advertised network and the as…verry easy dont be affraid like before i was…just study only 9tut and no need for dumbs as weell best of luck
hii all , today i passed CCNA 640-802 with score 960/1000
more and more tahnks 9tut and ExcamCollection
hope all the best for candidates
hey xallax and 9tut.
if you could tell me how come i download this sim in packet tracer?
i ll b grateful if you help me out
@XJ
packet tracer version 5.3.3 : http://www.mediafire.com/?nqdoh5b84naw69y
@xj
http://www.9tut.com/download/9tut.com_CCNA_EIGRP_sim_question.zip
I had CCNA Exam on few days back EIGRP is bit changed …
it was some thing like
R1:
S 0/0 192.168.60.XX
FA 0/0: 192.168.50.xx
FA 0/1: 192.168.50.xx
R1:
S 0/0 192.168.70.XX
FA 0/0: 192.168.30.xx
FA 0/1: 192.168.30.xx
new router:
S 0/0 192.168.20.XX
FA 0/0: 192.168.40.xx
FA 0/1: 192.168.40.xx
MAIN was advertising the only 2 networks
network OF S0/0 and S0/1
I hope this will help
R1: had 1 network on LAN and 1 on S0 which was connected with MAIN ROUTER
Same with R2 and new router
I hope you guys got what i mean :)
Friends,
I would like to know the people who made the test recently in cpe R1 is configured default routes below, or if it was necessary to perform the configurations of these routes in EIGRP LAB.
Thank you!
ip default-network 198.0.18.0
ip route 0.0.0.0 0.0.0.0 198.0.18.5
hello friends…how we use ‘passive-interface’ command? whn wl b we need to use thz one?
@Anish
Check it
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f0a.shtml
@mike
thanks buddy….and how we chk whether the sim are correct or not?
@Anish
What do you mean by “correct”?
pls tell how to check passive-interface on the router
@Mike
whn we do these simulation how we check everything is right?