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)
Mike ,
I failed the exam which i took on 1 sat 2012.I had read a lot. What should i do.
@ maz
Find out where you went wrong and re-write again soon,am doing the same.
So if I see a passive interface I need to remove it? How will I know if the passive interface between the main router and ISP or the other routers I know the sho run commanfd but what am I looking for? Thanks
@maz
Keep going. Try harder. YOU must watch Train Signal CCNA video tutorial.
Good luck next time
Hello,
How do I find out if the passive interface is between the main router and ISP or other routers? Do I use the show run command and look for the passive interface? If so what is the correct syntax? No passive-interface and then the interface? I would appreciate any help. I am taking exam tomorrow.
Hello,
Below is the command to remove the network statment that doesn’t belong but if I also have to add the missing network statment would I just add the misisng network statment below? Or do I have to do the router EIGRP syantax again? I have exam tomorrow if anybody could clarify I would be so gratefuk.
R1#config t
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)#router eigrp 212
R1(config-router)#no network 192.168.0.0
R1(config-router)#
pls any one tell me. what is the command to view passive interface?
pls help me.
if there is not a passive interface on s1/0, should i enter passive interface into s1/0?
guys, ON THE EIGRP Simulation, do i need to configure a default network and static route to the internet in router1 if i dont see them on the running config?
and where do i make the “no passive interface .. ” command? in R1(config-if)# or
in R1(config-router)#?
@Slaughter: No, you don’t need to do any of them. Just configure the EIGRP routing to work correctly.
Took exam on 4th Sept, Sydney, Australia. I saw switches in the EIGRP lab sim instead of routers.Also the Interface fa 0/1 in ACL sim did not have IP address configured(it was blank when I put in show running-config). Does some one else have a similar experience? I got 762 :-( Please help, have ACL and EIGRP labs changed?
Zim ndeip.my mail is smsmutubuki409@gmail.com up
Hello,
I just took the exam and failed. Many new questions that were not in dumps I used pass4sure and Jericho and sekur. The the sims changed a little bit and had way different requirments than I have seen and it threw me off. On EIGRP I had been told to look under the show run and look at the interfaces and compare to the EIGRP area I did that and I had not one of the interfaces under the eigrp area I had interfaces under the eigrp area but none were the IP of the interfaces any idea on this one? I was totally lost so maybe eigrp has changed. ACL I got 100 percent on same as 9tut. I am so lost on the EIGRP sim I have studied my butt off and can’t pass this exam. So aren’t I supposed to do a show run and look for the IP of the interfaces and then compare to the eigrp area? I would appreciated any help.
Hello,
I just took the exam and failed. Many new questions that were not in dumps I used pass4sure and Jericho and sekur. The the sims changed a little bit and had way different requirments than I have seen and it threw me off. On EIGRP I had been told to look under the show run on the main router and look at the interfaces and compare to the EIGRP area of the main router I did that and I had not one of the interfaces under the eigrp that matched the interfaces area oif the main router I had IP’s under the eigrp area but none were the IP of the interfaces on the main router any ideas on this one? I was totally lost so maybe eigrp has changed. ACL I got 100 percent on same as 9tut. I am so lost on the EIGRP sim I have studied my butt off and can’t pass this exam. So aren’t I supposed to do a show run and look for the IP of the interfaces and then compare to the eigrp area? I would appreciated any help.
Exam Changed!, I had a similar experience! EIGRP lab was completely different! -Jay
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
is it true that exam has been changed?
THE EIGRP SIM ON 9tut is not valid exam has changed.
@Brian: Could you please describe the change?
Hello 9tut, I saw couple of switches instead of routers, I skipped the lab as I wanted to save time.Question started with CCNA.com
Hi Brian,
How about Q&A and other LAB, does it changed also?
what the change was that anyone please explain my exam is after few hours. how can i solve it?
VTP lab was same.EIGRP completely new.ACL lab interface fa 0/1 does not have ip address.Questions were almost same
thanks Jay!, hope we can have an updated EIGRP & ACL lab here. pls anyone help..
Hello 9tut I was so upset that I don’t remember thw whole sim but what I do remember was there being all switches and NO routers and the question they asked was very confusing. The router were enginering 1 and enginering 2 and we needed to make all switches work properly and you needed to idenify what the issue was. I had no clue how to do this sim so I just hit next and moved forward. I wish I could tell you more on eigrp but I can tell you VTP I had all the samw questions although reports out there are two questions have been added. ACL same questions but NO IP on the interfaces so you are left guessing in regards to the ip access-group 100 out. Also I had about 12 new questions I have never seen before on any dump. 4 were ACL related. I hope this help sorry I was so upset that I kind of forgot the rest. Thanks.
I was in the same state Brian, I can understand. I had been preparing for weeks.
What is your score Brian? I got 762
@Brian: Is this the sim you saw in the exam?
http://www.9tut.net/icnd2/icnd2-labsim/vtp-configuration-sim
9tut I don’t recall any routers I only remember all switches to be honest, but this sim looks very close to what I had. Sorry 9tut I wish I could give you more but I just don’t remember.
Jay I got 810.
I posted on EC that this would happen on 9/5..
did it look similar to this? http://www.digitaltut.com/route-eigrp-stub-sim#more-30
Just went through every sim i had from 3 different websites, there is no such lab as EIGRP with only switches. You realize in your last post Brian that you said theres no routers only switches yet said there were 2 routers named engineering. So either you’re full of Sh** or you have no idea what you’re talking about.
How do you configure EIGRP on switches only? Impossible
Yeah Jerry you are right the only switches that could possibly run a dynamic routing protocol like eigrp are layer 3 switches and they would have to be modified to use eigrp as most really only use RIP and basic static routing but I cant see that being tested at ccna level. Brian sounds like you got a VTP question and mistook it for eigrp but I don’t know how that is possible, anyway we will see if the new sim really is that different or its just a people dont know the eigrp protocol and go into scatterbrain mode when they see a different topology!
Just went through Actual Test’s 473 page PDF. I think you’re right friend, he might have gotten the VTP sim and just got confused. Because I am unable to find anything like what he’s described via google or anything else from actual tests, how2pass, pass4sure, or boson software
Dean if the new sim is different and you still need to get eigrp connectivity it can only be a few things really that they will test you for at ccna, such as subnet mismatch, AS mismatch, incorrect interfaces advertised in eigrp, passive interface command on wrong interface and possibly authentication but I cant see them throwing that in the mix!!. Show commands and ping will unlock the answer!!
i’m pretty sure it’s not eigrp. it could be a new lab sim about STP or VTP. if you try to make sense of it, there’s NO WAY it could be eigrp.
I agree No way its eigrp and it seems like the stories have changed, now people are saying that the eigrp lab didnt come up and its a vtp lab but all the gossip seems a little silly now as it was probably just one of the other sims that have been around for a while and not a new one!! I am taking this all with a pinch of salt, too many inaccuracies with reports to believe any of it.
Hi All thanks be to Allah…
Am from Somali live in India hyd.. Am passed today with 894/1000. . Nothing has changed all sims were the same like 9tut thanks 9tut. But i saw new question on my exam. I studied Todd Lammle, sheker dumps and all question are from 9tut and sheker dumps..
Jerry I am not full of BS so don’t be a jerk and insult people. I was trying to think of my sim and I actually do remember one router going to the ISP. But the rest were switches. I am postive about this. The sim was completely different. It was the EIGRP lab not VTP as my post have stated the VTP sim on my exam was the same as 9tut.
Rizak did you get eigrp sim ?
@ Brian
Have you been able to find here on 9tut or anywhere else what sim you were given?
Hey Ronnie,
No I haven’t . I wish I did so I can tell you guys. I no some people are getting the same exam but I think Cisco is slowly rolling out the new format. Time will tell. All I remember is one router to the ISP and the rest switches.
@all then rizak may tell had finish his exam hours ago.
I was planning to take on the 10th, but decided to postpone it to a later date till I learn more about this rumor. Can’t afford to jeopardize one whole simulation (if the rumors are to be believed), can’t afford to re-take the test..
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..
hi galz
as changed in lab were concerned lets wait for 9tut,,
as i know 9tut will take care of it.
as we all know labs in 9tut is important as in lab in exam.
Hello all,
I took exam today and failed. I had the 3 sims from this site EIGRP, ACL and VTP. I nailed the ACL sim and VTP but I failed the EIGRP sim. ACL changed a little bit when I did a show run there was NO IP under any of the interfaces this did stump me?? VTP I got questions 2, 5,6,7 all the same as here. Please help me understand. Ok so on EIGRP sim the new router (AS) numbers were wrong I easily fixed that. Then on the main router going to the ISP I did a show run and saw all of the interfaces with IP then I look under the EIGRP area of the show run and none of the IP under the EIGRP area matched my interfaces IP on the main router? Can somebody explain this to me and help me understand what I am doing wrong? I would appreciate any help with this. I was told to look for the misisng network statment but how can I do that when the interface IP and EIGRP IP don’t match up? Oh and I had about 8 to 10 questions that were new and I hadn’t seen in dumps before.
@Bummed
Do you see any switch on your EIGRP lave question? Any change from 9tut?
@Bummed out.
Show run is not the only way to view IP on the interfaces. You could try to use show interface, show ip interface or show ip interface brief commands. Maybe you have to set IPs on the interfaces according to exhibit, but maybe it’s a bug. Are there any comments, guys?
As for EIGRP, you should just delete wrong network statements from the EIGRP config and advertise subnets that are set on the interfaces. And don’t forget about no auto-summary statement. Then type show ip eigrp neighbors to verify new adjacency. So routers should be able to ping each other as result.
Me too Bulkhead.. Wait and see …Cheers.
@Brian
i try to understand this
“I do remember was there being all switches and NO routers and the question they asked was very confusing. The router were enginering 1 and enginering 2 and we needed to make all switches …”
you said NO routers…
also you said “The router were engineering 1 ang 2″
i think even 9tut cant understand this statement…
BOTH are CONTRADICT to each other,,,
anyway thanks for the effort to try to share your experiences…