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)
my test test is monday at 1.00 pm uk time this is my last pop as exam is being replaced hope i pass this is 3 rd attempt
first score 780-825
second one 815-825
hit the bar twice hope this time i can score
I take my CCNA test 3 days ago..to tell you the truth I have a score 947 thanks to 9tut…all the labs are in the website..thank you for all..9tut is a great guide..
Just passed my exam with 986 score … labs were ACL 2 , VTP & EIGRP … thy were somehow exactly like the labs here …. even much easier … the EIGRP was a little bit confusing but keep calm and do what you used to do here …. thank you 9tut and spike for your dumps … :) good luck for all who will take the exam in the next couple days :)
Passed the 640-802 today… 973/1000 the EIGRP sim and the acl sim came. The dumbs and simulations I downloaded from here really helped. Only a couple more days for this exam but good luck to anyone taking it and everyone doing the new exam series !!
passed the 640-802 exam today. Thanks 9tut:) Read carefully the acl’s sim.
What is the most updated acme dump anyone? Cisco.Acme.640-802.v2013-08-06.by.Acme.649q.vce ?? This one seems to have a bunch of mistakes.
Alhamdulillah. Passed with 1000. Had eigrp, acl2 and vtp sims. In eigrp after fixing the network, the ISP’s IP wasn’t responding to pings so I left it. I pinged all other interfaces. In acl2 public server’s ip was given but still I used access-list 101 permit ip any any at the end. In vtp sim I also had a question like Q8 on http://www.9tut.com/80-ccna-vtp-sim-question. The list of choices included 3 trunk ports plus two ports of vlan 33 and some other ports, but the question asked to select only three. What I did was I selected the 3 trunk ports, ignored the vlan 33 port from which the frame originated and selected the remaining port of vlan 33, meaning I selected 4 choices. Also in vtp sim I had to use the #show vtp status command two times to get the IP address.
Q3 of http://www.9tut.com/ccna-dhcp-questions was also in the exam. I selected C & F. F seems confusing because of the ‘default’ word in the answer but it is still the correct choice.
Q7 of http://www.9tut.com/ccna-stp-questions was also in the exam. Note that the answer given on 9tut is correct but the explanation is wrong. Correct explanation is that due to speed mismatch the port speeds & path costs will change. Switches use auto negotiation to find speed and duplex mismatches and adjust accordingly. The gigabit ports Gi0/2 on switches B & D will operate at 100Mb/s due to autonegotiation and STP cost will also be 19 instead of 4. Due to speed autonegotiations, the speed on gigabit ports will reduce to fast ethernet speeds and path costs of spanning tree will also change.
?, Tab and short commands were working for me in all 3 sims.
I would like to thank all those who’ve helped others in one way or another in preparing for the CCNA exam. I’ve shared the above information because it might be helpful to someone who has not taken the exam yet. Good Luck!
hello. can anybody send me the last dump? i will ptake the test on monday. thanks. my email is jesus.jj.m@gmail.com thanks
@Thomas
Were the labs the same on each test?
@Jesus .. done i’v sent u lastest dumz and u can find it at examcollection .com
good luck :)
Passed on 24-9 wirh score 1000,
Lab is the same without any modifications, only there was a passive interface on ISP interface but we will not do anything for it, we just make our normal configuration
hi all
one question plz, I confused with passive-interface if it in interfaces on routers does I have to disable it ??
and if its not on ISP interface does I have to add it ??
thx
one more question
plz if there is in eigrp route additional network no need it does i have to remove it ??
even in R1,R3,R2 or R4
I passed CCNA with 1000/1000 today. Few questions are not in dumps: 1 OSPF(different options), 1 GLBP, SNMP(TRAP is not listed, but INFORM is there and Get/Set?), 1 netflow(command netflow used to virtualize flow data to console terminal); SIMM (ACL, ACL2 and EIGRP).
Thank you! 9tut,Rupesh,Pascal and ACME.
Next time say that PC dont have ip :D
@Eric
Kindly do u remember the question not mentioned in dumps and what is correct answers for them
plz i have exam tomorrow
@Eric
did u passed CCNA 640-802 ? or the new version plz
Everybody says Spike and I can not find it anywhere that dont want a card.
@ Ahmad NO. Do not add passive-interface. From R1#show running-config if you see a passive-interface s1/0 then just ignore it. If you see passive-interface on the other ports, s0/1, fa0/0, fa0/1, then remove it. DO NOT add any passive-interface!! Example R1(config)#no passive-interface fa0/0 Good Luck
@ Jena doesn’t look like Eric talking about 640-802. There is NO OSPF sims.. TRAP? INFORM?
Hi guys is this lab part of ICND2 or just CCNA? Thanks
Any question not in this dump? Wil be taking in a few minutes
Hi,
Good day!
Took the exam last 09/28/2013 and passed the exam 984/1000.
The LAB was there only diffrnt IP addresses. and ports.
Thanks 9tut!
Ace M.
CCNA
Hi,
Took the exam atlast on 09/29/2013 (sep 29th ) and passed the exam .
The simulation that was asked is ACL, EIGRP and VTP.
9tut Lab Simulations has helped a lot.
In ACL,
– Host C should be able to use a web browser(HTTP)to access the Finance Web Server
– All access from hosts in the Core or local LAN to the Finance Web Server should be blocked
In EIGRP,
Exactly the same but with different IP’s.
In VTP,
– 5 questions were asked, and all are in 9tut.
The Objective Questions, almost 70% comes from 9tut.
I read only 9tut and ACME questions .I really put my effort only in the last 4 days as i was having my project work as well as personal work.
9tut really rocks and helps person who really want to get pass in the certification point of view.
Thanks 9tut!I would contribute for 9tut, without whom i wouldn’t have passed in a short period of time.
Vijayalakshmi
CCNA
@Vijayalakshmi
is the answer for ACL as below correct?
access-list 101 permit tcp host (C_IP) host (Fser_IP) eq 80
access-list 101 deny ip any host (Fser_IP)
access-list 101 permit ip any any
?? plz my exam next 3 hours
For all they did CCNA can I review my answers after finish exam ?? plz its first exam for me
@jena you CAN NOT. I think you should practice with the demo by using button TRY ME at the button of the demo for each type of question.You will know :).
@9tut: please answer my following question:
Today, I met the EIGRP sim.There is some strange network was in the eigrp 222 of the Home1 router, should I delete it or just keep it??I passed but I so nervous to del something I not sure.However, I still wonder should I delete it( I think I should have del it for security of the net).
Could you please answer my question 9tut ..
@zZWindzZ
thanks
plz can you clarify what u faced on EIGRP ? i didn’t get ur point do u mean u fount extra network in Home1 router ?
did u deleted and how much u get in question 100% or less
CCNA bye-bye with 947/1000 10min ago. CCNP Here I come
Labs were ACL2, EIGRP and VTP, the same as @ 9tut.
Its easy guys, ONLY need to Relax and control ur nerves.
- IfTab key doesn’t work, use “SPACEBAR”.
- Do all configs before saving to NVRAM
Thanks a Million cbtnuggets, 9tut, Testking etc
Best of Luck
@C_Angel
plz can u tell me what is eigrp error came for u and is there additional network was in R1 (not required)
@jena,
You are correct.All the best for your Exam..
@jena, access-list 101 deny ip any host (Fser_IP)
remove access-list 101 deny ip any host (Fser_IP)
The Correct answer for the ACL is
access-list 101 permit tcp host (Host C_IP) host (Finance server_IP) eq 80
access-list 101 deny ip any host (Finance server_IP)
access-list 101 permit ip any any.
I’m sorry about the preivous comments.
@jena : In EIGRP sim, I do a show running-config in router Home1, I saw net 192.168.85.0 ( It wasn’t listed in question, and no interface of Home 1 is belong to it).
I wonder should I delete it from the eirgp network. I didn’t but I think it should be removed for better security.
@9tut: could you give some advices for that?
@zZWindzZ: Yes, that network does not need to be removed but we should remove it for better security.
Passed the test today! Labs were ACL2 with the host B modification, VTP and EIGRP
good
@ zZW if it’s not listed in the chart then don’t worry about it. Just leave it. If a network in the chart not in running-config then add that network. Focus on whats in the chart – listed below the topology.
@9tut,Anonymous : thank you!
Thanks so much again 9tut and you all !
If there is a passive interface, where do we remove it from? Assuming we are removing it from fa0/0 (2 following lines, 1 with router, 1 without router) HELP!!!
R1(config-router)#no passive-interface fa0/0
R1(config)#no passive-interface fa0/0
TY !!! I passed the exam today , your labs was very helpfull , acl2 , vtp , eigrp
Thanks Allah
Passed exam with 973/1000
EIGRP, ACL2 and VTP thanks 9tut
Cannot get this SIM to open in PT 4.11, 5.0 or 5.3 while some other SIMs do open
Is there a particular version needed?
@ Jo I am using 5.3.3.0019 and it opens all SIMs. Make sure you remove the zip files as the PT targets that file and prevents you from opening the sim file.
great site i got my exam in a couple of hours very nervous.
@jena no you can’t review your answers you’ll just know each section with its degrees
like : Describe how network works 89% and so on.
Got this lab sim on the 640-802 today. Unfort. got real nervous and bombed out on it :/
For some reason I couldn’t remove the passive-interface. Almost passed the exam. Will try studying 9tut harder next time.
thanks 9tut
Hi guys.. I got passed my ccna last week with 933 marks. Most of the questions were from 9tut, and all three sims are also from 9tut- eigrp, vtp and acl-2.
Thanks a lot 9tut..:)
Try to solve 9tut all questios twice and then go through with the below links atleast once. definitely you will get clear ccna..
Cisco.Lead2pass.640-802.v2013-09-10.by.Kraven.670q
Cisco.SelfTest.640-802.v2013-09-23.by.Kelly.335q