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)
@silverstone
will it work in CCNA exam ??
CCNA 640-802 will be last day to test Sept 13, 2013 and It will accelerated
200-120 CCNA v2.Gudluck everyone who are take the exam..
@pawan
yup just follow what 9tut said you will in good hands and follow your heart lol
when will be your scheduled exam?
am doing my ccna exam today in 2hours …any last minute advise? am soo nervous
please can someone send me the latest version of packet tracer at boubachezkamdem@yahoo.fr.
The one that i have is not taking this lab simulation.
Thanks in advance
@
bouba
please download packet tracer 5.3.3 version that is the new version
at last pass ccna exam. 960…..thanks Allah and 9tut…
very easy. sim are as like as 9tut. there are some change in vtp sim. so for sim you should a right concept eigrp,acl and vtp.
in vtp full change in q.7 and q.9…………..
so study
thanks
pls someone send me crack for vce 3.1.1
congrats kafi!
what dump did you use?
how about ur acl and eigrp lab?
Congrats to kafi!
@kafi what was the changes in vtp can you please tell us??
@Kafi congratulation and plz share your lab in vtp
i got exam yesterday and pass 986 thanks a lot 9 tut :) labs were same topic VTP(1,2,4,5,8), ACL2(host b only access hptt all access host b and other deny) EIGRP(112 a.s.) as 9tut. i faced problem with VTP sim because when i wanna to use ” show cdp neighbors” i didn’t show out and if you will have this situation write show and press enter it will come neighbors
Packet Tracer lab ( http://www.9tut.com/download/9tut.com_CCNA_EIGRP_sim_question.zip) is not working in latest version 5.3.0.0088 version.
Can anybody tell me in which version is this lab created.
Regards,
Saeed
@Saeed: Please use at least v5.3.3
@silver stone
am still occuring problem in eigrp lab please help me
am doing my exam in 24 hrs….sombdy send me the packet tracer to open this eigrp lab sim?
plmbgs3@gmail.com
am so nervous
sims are still valid cleared ccna 960 thanks a lot 9tut.
@amrit
will u please tell me the EIGRP lab r explain me y means am failing to do plzzzzzzzzz
exam on 20 april any tips for dumps and sims plz
@Anonymous
Kindly plz read dumps carefully
Hey Engineers,
wish me luck next Monday 22-04-2013 for CCNA exam
I just want to clarify the meaning of a wrong network in R1
in this example R1 should include networks
Fa0/0: 192.168.77.33
S1/0: 198.0.18.6
S0/1: 192.168.60.25
S0/0: 192.168.36.13
when you make show run on R1 you must see all these networks but when you see for example S0/1: 192.168.40.25 you should delete it and create it again like following
R1(config)#router eigrp 212
R1(config-router)#no network 192.168.40.0
R1(config-router)#network 192.168.60.0
I hope you find it will.
Wish me luck again :-)
Passed my exam yesterday with 1000/1000 numbers ALLHAMDULLILAH. I got EIGRP ACL2 and VTP lab. Best of luck guys!!!!!!
why are we not adding wildcard mask in the command after n/w id?
@dj
in eigrp when you want to add network you should use the command
network x.x.x.x without wild card mask
we can use ?,tab in lab exam
pls someone send me vce 3.1.1 crack
someone pls send me vce 3.1.1 crack (chrisalom@yahoo.com) thank you so much
Passed today 933/1000 Thanks Sekhar.Dump still 100% valid laps (EIGRP,ACL2,VTP) same as 9tut
was there a scenario of configuring the command “ip default-network”???can this be given in the exam?
@ Ghorba
Next friday i will take my test exam, i’m a little bit concerned about eigrp lab, is necessary the ip default-network x.x.x.x or ip 0.0.0.0 .0.0.0.0 x.x.x.x
Please advise me
can someone please send the latest dumps to kolly20102001@yahoo.com and how do I get the link to download the Packet Tracer 6, the EIGRP simulation is not working with my present version. Thanks in advance :)
One could comment more on the LAB EIGRP?
Please can someone send me VCE 3.1.1 crack, thanks
adukmak@gmail.com
can i do this in the exam?
router eigrp 212
network 192.168.60.64 0.0.0.3
network 192.168.60.80 0.0.0.3
network 192.168.77.32 0.0.0.3
no auto-summary
adding wildcard bit to be sure. :)
@tiyansbaby
yes u can use ths wildcard and if dnt use also it will wrk man
WTF? Okay this is my first time attempting the SIMS and I have no clue what is going on here. The link to download the SIM for practice only open a blank Wireshark page! Can the author email me at don_powell3@yahoo.com. maybe if I figure out the practice SIM it will all make sense but for now its like looking at a “anti-derivative” math equation
Spike dump valid. sims eigrp, acl2 and vtp same as 9 tut but change of IPs and names. eigrp number was 122 in exam and different IP. VTP same but got 5 questions only. use spike n practice the labs u’ll pass :)
@ kenya
kindly tell me
befor apply no passive interface ….
did we have to enter this comman
# router eigrp 212
#passive interface se2/0 example ……………………. is it right way ????
@ kenya
kindly tell me
befor apply no passive interface ….
did we have to enter this comman
# router eigrp 212
#no passive interface se2/0 example ……………………. is it right way ????
HI GUYZ Takin the exam in july again am studin thru spike and sekher dumps plis guyz any update
The EIGRP SIM is killing me. I am confuse whenever I run show running config, I only get:
R3#show running-config
Building configuration…
Current configuration : 635 bytes
!
version 12.2
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname R3
!
!
!
enable password cisco
!
!
!
!
!
!
!
!
In the answer above is show all a lot more information. I am doing something wrong or did i skip a step. I am literally just learning this stuff with zero prior Cisco experience so please explain like you are explaining to a dummy. Thanks
please i need latest. ccna dumb … i’ll be really grateful if anyone cares
my email elahly_egypt_2000@yahoo.com
please i need CCNP dumps if any one have ,, i’ll b grareful ,, if any one could sent it to this email add .. burhan.hussaini@live.com
I passed exam yesterday 986 marks ,Same Labs EIGRP,ACL 2 ,vlan troubleshooting
Great work done by 9tuts.
Use dumbs http://www.examcollection.com spike file with 662 questions
or for pass4sure go to http://www.rapidshare.com
Username :ccnadumbs Password :ccnadumbs
@ don from jamaica
when you see –More– that means there more information, just press the spacebar, to allow it to show more information.
pray for me. going to do ccna on 3rd of may.
realy confused. God will help me anyway
Can some one please send me latest dump mfarhanali@live.com
I am not 100% sure on this since I am learning the stuff, but it seems that defining EIGRP networks on R3 for 192.168.60.65 and 192.168.60.81 as 192.168.60.0 does not seem correct. If you see other routers they also have 192.168.60.0 networks as well. Like R2 has 192.168.60.97 and 192.168.60.113, thereby routers not know which to forward to.
suggestion by tiyansbaby April 25th seems more precise.
which network should i delete on R1 when meet @ the exam.i need ur reply thanx