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)
Did the Exam really changed ?
taking the exam in 2 days anyone can please share the latest dumps. poomsa@yahoo.com
Just Passed with Score 986 !!! Thanks 9tut !!! Watson dump is 100% Valid Ether channel question was there today(Speed Mismatch).. SIMs were ACL,ACL2 (MOD 3 Host A) ,EIGRP with change in IP.Important thing Specialy concentrate on Multiple choice questions as the answer key order will be entirely changed so try to under stand the answers properly else all very easy best of luck for you all..Last but not least I came here (9tut) little late .9tut is realy awesome for CCNA .With 9tut you can win the Exam 100%!!!! Thanks you for all your valuable comments here friends :-)…
hi every one, if you have any dumps in pdf format, I could generate for you “.VCE” file that works very fine in VCE 1.1.5, so you can simulate your exam.
I have 2 .vce files just email me I will forward for you the materials, VCE1.1.5 software and 2 “.vce files”
good luck, please don’t forget me in your prayer
tzarayass@gmail.com
Hi..Which is the eigrp lab which is coming in the exam? The one in this page or the EIGRP troubleshooting sim..Thanks
i wrote my exam today, dumps still valid my score was 945/1000.lab: eigrp,acl1, acl2 MOD 3
Thanks 9tut
Any updates on the labs that were used for their exams? I take my test Nov 24th. thanks.
Took my exam today, and passed! All the exam questions are here. No drag and drop questions. I got the EIGRP Lab question on this page not the troubleshooting one. Also, ACL1 and ACL2 MOD 4. Good Luck!
congrats for all the passers. hope i can make it next week ?….
Is the eigrp sim in watson correct or 9tut?
different ip’s and a different eigrp number.
watson = eigrp 222
I passed tody /986
EIGRP-LAB
ACCESS-LIST SIM 1
ACCESS-LIST SIM 2
Can any1 send me latest dump on matsimelatk@gmail.com
@mila Mathews dump just review the exam questions and disregard the simulation part .you can review for the labs here in 9tut it is more updated but in the real exam the AS number and IP’s are different please study the concept of EIGRP. have a good day
Hi All,
I got this Simulation in Exam.But even after changing all the configuration, we can’t able to ping the ISP’s gateway.Not sure what’s the wrong.
But anyway I passed Exam , even after skipping this sim without complete results
passed yesterday 952/1000.. Thanks 9TUT.. Awesome site!!! LABS Eigrp,ACL, ACL2
passed today 986/1000
watson damp
ACL1 , ACL2 , Eigrp
Best wishes to all
I passed today. My score was 1000/1000.
This EIGRP lab.
ACL 1, ACL 2 modification 3
EDMUNDO dump
passed yesterday 986/1000
watson damp
ACL1 , ACL2 , Eigrp (a bit change)
Passed my exam yesterday. I got ACL1, ACL2 and EIGRP LAB(AS is a different one).
Also the 2 drag and drops – administrative distances, cable types.
Good luck to all…..
tik.kira@yahoo.com
passed my exam today, 1000/1000, ACL, ACL2(modification 4), EIGRP LAB – Different AS, and there is an additional network address on R1 that you should remove
sources : watson, premium, 9tut
God Bless everyone!!
anybody with latest vce pliz send amarbangura@gmail.com
Hi 9tut! taking the exam in 4 days anyone can please share the latest dumps tanksss. Omarccna14@gmail.com
Passed my exam today 29/11/14, I had ACL, ACL2(modification 3) HTTP web browser, EIGRP LAB Different AS, IP and there is an additional network address (IP)on R1 that you should remove watson314q, examtut, 9tut
God Bless everyone!!
Best wishes
@Banji Please tell me what we must do in addition to what we have here in the EIGRP lab. Thank you
@9tut
IP Addresses are listed in the chart for R4… in the packet file is different.. so i can’t ping R4 addresses from R1.
please suggest me this is the actual reason??
I Taking The Exam in 4days.Anyone Plz share the Latest dumps. Thankxx
usman0232@yahoo.com
plzzz
@Sam
Maybe you downloaded a different packet file. If it is different address just ping that address or you may have to configure the EIGRP of R1 and R4.
Passed today…
finally… my 3rd try in 3 years.
Thanks 9tut.
I want to specially thank all of you who have commented here to add your experience, ask questions, and give help to others. I think the most important comments of all, are those that share their failures with us. For each success we read about here, there are thousands of people who sting with the hurt of failure, or suffer the silent loneliness that comes from fearing to even try.
You can do it.
If I can, trust me… you can too.
Passed Ccna 200-120 . Thanks 9tut it was usefull. Today was EIGRP , Access lists and access list testlet. If you have answers write to me at ciscoboy@gmail.com
Passed Ccna 200-120 . Thanks 9tut it was usefull. Today was EIGRP , Access lists and access list testlet. If you have answers write to me at cisscoboy@gmail.com
Congrats Bakin’ my Ham and Alex.
@Alex What country did take the exam?
@Bakin’ my Ham which labs came out when you failed and when you finally passed?
I’m currently doing watson and 9tut labs. Do you guys think its enough to pass?
hi everyone i m going to take exam coming Monday i just want the latest dumps plz send me at syed.fahad27@yahoo.com if possible then send in pdf format its my humble request to all of you because i m a poor man and won’t be able to pay fee again plzzzzzzzzzzz help me and send real and valid dumps
@Greg. I take this exam in Croatia.
@Greg It is enough to pass.
@Alex Thanks.
please hook me up latest dump files at pdiaite@gmail.com. first try friday
This lab was in today Exam
@Raghu Congrates, could you please send me dumps at yugesh003@yahoo.in thanks
Can we use Help (?) command in Exam SIM question ?
its highly appreciated if any one let me know about it.
Thanks in advance.
anyone having latest dums pz mail me T u_basharat@yahoo.com thanks, i have paper on saturday, plz give me latest data dums , thanks
anyone having latest dums pz mail me contact2ua@gmail.com thanks…….
I have passed Yesterday with 980 marks and still dumps and labs are valid
In EIGRP, “ip default-network” for advertising default-route doesn’t seem to be working. It seem s to work under RIP.
I passed today with 1000/1000, EIGRP( AS 221 and 1 network missed and AS different), ACL2 (MOD 3) ACL1(9tut)…………… watson and 1 question from mathew……….. I hopped u read all in 9tut…….thanks 9tut…..
Does the “?” work when entering commands to give a list of available commands you can use?
i passed 10/12/2014 with 1000/1000 @ sri lanka.
acl1 (9tut q) , acl2 mod 2 (from host d) eigrp lab (R1′s passive intface connected to isp. so we don’t config it as no passive inf command ) other all questions from 9tut .
tnks 9tut.
I am not able to ping S1/0: 198.0.18.6 of R1 from other routers. Even from R1 also it is not working. I checked for the passive interface but nothing is configured as such.
Found this Lab in my exam. December 4th!!!
i passed 14/12/2014 with 1000/1000 @ tr.
acl1, acl2 mod 4 (from host d) eigrp lab (as 12)
new etherchannel question (DTP negotiation settings)
All Questions from Dumbs (watson, examtut)
and very special thanks to 9tut
could anyone explain when will i use the no passive-interface?