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)
Hi, I want to clear to form adjacency if you see passive interface you need to remove it right? because I read some comment here that he saw Passive-interface in the the link between R1 and ISP but his comment is this (Don´t use the “no passive-interface)? should i remove it or as is? thank u all
I’m preparing for my CCNP exam can anyone help with latest dumps? my email (mbaraoul@yahoo.fr
i saw this on the exam Passive-interface in the the link between R1 and ISP but didn’t know what to do in that case
Hi CCNA what you did when you saw that passive interface did you remove it? as far as I know you need to remove it to form adjacency and to form neighbor so you can ping the ip’s. please tell me Thanks
I think need the passive interface between ISP and router 1 , Because ISP can connected other area and sent update , We don’t want these .
Hey guys, i just took the exam and i finally passed!
And FYI, this question came up and it is exactly the same HOWEVER!!! It seems that they have added one more twist to it as well. (Maybe that is why KuS couldnt see the route established)
* Please do a “show run” to check the ip addresses under the router eigrp and interfaces are correctly included with all network.
* You MAY notice one of the network address has been wrongly configured (which does not exist in any of the Core’s ip addressing network)
*Once this is correctly configured, you should see the connection successfully established
*I noticed none of my devices (even my core router connected to ISP) is not able to ping the ISP but when i do a “show ip route” the static route is there and correct.
I hav pass ccna today thax to 9tut labs were eigrp,accesslist 1 and 2 study hard o this website guyz
Passed 958/1000
Thanks 9tut! Exactly same EIGRP ACL ACL2 Sims…
also went through dumps really helped a lot!!!..
Whatson, Giilibeast, Jennie and Mathew Dumps (examcollection.com)
All 51 questions were from dumps…
even if u dont study book and only go though dumps a few times then you will pass easily…
just remember the answers given in dumps…
R1(config-router)#net 192.168.77.0
R1(config-router)#
%DUAL-5-NBRCHANGE: IP-EIGRP 212: Neighbor 192.168.77.34 (FastEthernet0/0) is up: new adjacency
R1(config-router)#do sh ip eigrp neigh
IP-EIGRP neighbors for process 212
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 192.168.60.26 Se0/1 11 00:12:56 40 1000 0 24
1 192.168.36.14 Se0/0 12 00:12:54 40 1000 0 24
2 192.168.77.34 Fa0/0 11 00:00:27 40
Passed with score of 1000.Thanks 9tut….Simulations eigrp,ACL and ACL2.
dat eigrp almost made me fail i thank god am certified ccna wen i put d no router eigrp 2 d system did not recognize meaning i had to use the no passive-interface command tanxs to 9tut i was aware of it.be careful dumps are valid gill beast watson …gudluck pips
hi fellows,
can any1 help me by sharing there dumps with me …. it would be a gr8 favor ….
b1lal_ahm3d@hotmail.com
thanks
Did my exam today and got 986/1000
Thanks a lot 9tut for your help
the sims today were acl1 acl2 and eigrp
for those attempting to do the exam i would recommend going through the foloowing dumps
gillbeast watson and mathews
I passed today, got 1000/1000.
I had acl, acl2 and eigrp labs. Acl was the same as it is here.
Eigrp was also the same, simple changes (ip addresses and eigrp 2). Passive interface command was on R1 and ISP link. Don’t remove it!
I got acl2 modification 3 and as a last statement I used: permit ip any any! In server lan I had only public web server and finance web server. There was no dns server.
I used the following dumps from examcollection.com: watson, matthew, examtut and gillbeast, but I think that watson’s dump is the best and quite enough to pass. All questions were from dumps!
hi mates,
can anyone help by sharing these dumps with me? … much appreciated ….
Thank you
cavaliarz@gmail.com
pls send me the latest dump to jamesmartin466@gmail.com
So I wrote my exam today and I passed 980/1000. I’m super excited and really thankful for this site. Labs were ACL 1 (Exactly as it is on this site), ACL 2 with modification 3 , host D, same concept but different IP addresses. I used the “access-list 100 permit ip any any” as my last statement and got the full mark. For EIGRP, the newly introduced router had a different AS from the others, had to change that and for the main router, a network was missing and it had a wrong network that had to be removed. That was fixed and I was able to ping all the other routers. There was a “passive-interface” command between the ISP and the main Router but I left it like that as advised on this site. Same concept again as what we have on this site just different IP addresses. Don’t forget to do all your verifications to check if you can ping and they can all “see” each other. I got 100% on Network Device Security.
Study, study, study and practise, practise, practise……This site is really helpful and the Watson dumps is still 100% valid and its really a good one to practise with. YOU can do it, all you need to do is to Read, Read, Read and put in all your effort in practicing with the labs here or better still, build your own labs with the simulation question in the dumps on packet tracer and practise like there’s no tomorrow, that’s what I did.
Thanks to everyone who shared their success stories, who gave explanations on different questions and to 9tut for this site. I hope this helps someone like every other comment here has helped me!!!!! Best of luck to everyone.
On to the next……….CCNP!
when i am checking d connectivity from r3 command line ping 192.168.77.34 or any other ip then its pinging but when i am checking from PC-PT d command prompt then its not pinging.
please kindly help me on this.
I passed today, got 931/1000
I had acl, acl2 and eigrp labs
Eigrp was also the same, simple changes (ip addresses and eigrp 2). Passive interface command was on R1 and ISP link. Don’t remove it!
I got acl2 modification 3 and as a last statement I used: permit ip any any! In server lan I had only public web server and finance web server. There was no dns server.
I used the following dumps from examcollection.com: watson, matthew, examtut and gillbeast, but I think that watson’s dump is the best and quite enough to pass. All questions were from dumps!
I tried the EIGRP sim on Packet Tracer. It is working , able to ping R2, R4 ip addresses. But I am unable to ping ISP router 198.0.18.5 and even R1s IP 198.0.18.6. I tried to troubleshoot and see that R3 has learned the subnet 198.0.18.4. So what is the problem ?
Some one please help
now I am able to ping 198.0.18.5 All that I did was save and close packet tracer and re-open it. it is strange why it did not work earlier.
Should we use tab to complete any command or it will detect marks? any one kindly help
Should we use tab to complete any command in CCNA exam or by using it they will detect marks? any one kindly help.
tab key doesnt work in the exam
but the ? works if u hav forgotten the cmds
hi guys how do i get the watson’s dumps
hey guys …..i am preparing for ccna 200-120….which simulation questions i need to study?….eigrp,acl1,acl2 is enough to pass?
@akida, http://www.examcollection.com/cisco/Cisco.Actualtests.200-120.v2013-12-10.by.Watson.314q.vce.file.html
YOu only need to register at examcollection.com for free then you can download and make sure you have vce v1.1.1
thanks jim
I passed today, I got 1000/1000
I had acl 1, acl2 and eigrp labs
I used dump watson and this website (9tut) thanks, those two are enough to pass the exam.
I got a test today and my score = 1000/1000.
simul) ac1,2 and eigrp. almost the same as 9tut
muliple choices and drag and drops) 9tut and watson
thanks 9tut!
Passed, used CBT Nuggets, Watson and this page for the labs.
Sims
1) ACL: No change need, just need to do a show running, answers just like here.
2) ACL2: Got the same as the site, they changed the HOST to B.
3) EIGRP lab: got this same lab (EIGRP AS 12), no passive interface activated.
I passed the CCNA exam today. 5 questions can not dump the 314 in question.
Lab: 3 posts
ACL 1 (same as 9tut).
ACL 2 Modification 2 (Use the ip access-list 100 permit any any)
EIGRP AS 12 (no passive-interface without s1 / 0 because I do fail, I quit)
2 posts 2 and EIGRP Lab ACL instead of ip addresses.
I pass with 1000/1000 :)
You are not trying to implement :)
I pass the CCNA exam today, 1-2 question can not find in Watson’s dump.
3 lab:
- ACL1: same as 9tut.
- ACL2: mod 3, change IP address(use ip access-list 100 permit any any).
- EIGRP: change IP and AS number. No DNS Server.
Thanks 9tut and all your comment!
Dear all;
i’m just take the exam today and take 740….
i have problem with this lab…..
the lab asking for full connectivity to the ISP…..
the link between ISP and R1 is configure correctly but no ping from R1 to ISP ((198.0.18.6)
i can ping between all routers after correct the eigrp AS and add the network in both side R1 and R3…..
but can’t ping from any routers to ISP
and the exam asking to provide full connectivity to ISP ….
the command no passive interface serial 1/0 doesn’t executed on R1 router
please hope to know the correct answer……
Commando1180
You should not touch Serial 1/0 at all. If there “passive interface serial 1/0″ command in SHOW RUN – its for a reason. ISP should never receive PDUs from R1 concerning EIGRP routing.
The rest described in this topic already.
@Commando1180 : did you check the “ip default-network” in show running config?
!
ip default-network 198.0.18.0
ip route 0.0.0.0 0.0.0.0 198.0.18.5
!
ip 198.0.18.6 is not isp, that is the ip in R1 int s1/0
Passed CCNA Yesterday…thanks 9tut!
Hi Peter,
Congratulation!!. Is the question changed? Or remains the same as in exam collections and 9tut?
Thanks
I have passed my CCNA exam with 1000 on ist of September.
This simulation was present with little modification .
9tut is best for ccna exam.
All question was from 9tut.
Hi Ali,
Can I know what kind of modification have been made for this simulation?
Thanks in advance. :)
wtf the TAP cant use in exam!!!
I passed the exam on 2nd September 2014 and passed with 986/1000.
Almost all question from 9TUT.
I got this EIGRP Lab with 4 routers and a link connected to ISP with MOD 4 and different EIGRP Group.
Really good site would recommend, went through a lot of youtube videos for study and 1 day before exam from 9tut and last day watson dumps.
Thanks 9TUT
can anyone help me by sharing these dumps with me am writing next month? smk.khumalo8905@gmail.com
who pass the exam today please ???
I passed the test Sept 5th and this was on it and the ACL ones.
Passed the exam yesterday with score 972 ,, studied from 9tut and watson dump ,,, sims were ACL1 , ACL2 and EIGRP,, thanks 9tut and good luck for all passing the exam ,,for any help contact me on abdohanafy@gmail.com
hiii guys, r3 cannot ping s1/0 interface of r1….eigrp configured correctly…..all four nerworks are given in r1 ….what is reason?pls help
can anyone send me dumps for 200-120 to gomeze87@gmail.com
http://www.bubblews.com/news/7026831-cisco-ccna
Passed my exams today.thanks to 9tut
Lab were ACL 1,ACL2 mod2 and EIGRP with as 2.
Those who are planning to do it soon just read 9tut extensively and you’ll pass