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 enzo,
please advise if IPs listed are correct. if given was the same with the above sim (9tut sample), then IP on R1′s running config should be 192.168.36.0, 192.168.60.0, 198.0.18.0, 192.168.77.0. if the IPs in the exam are the same with what you had typed, then you should also issued ‘no auto-summary” command. may i know if you passed the exam?
Hi Anonymous,
The IP’s that came up in the exam were different from the 9tut sample given here…..I’m just thinking from Idowu’s comment above if one of the IP Addresses on Router 1 was incorrect and i had to issue to “No IP address Command” and replace with the correct IP Address…but i cant remember…..I did not pass the exam i’d say this question and 1 more cost me.
I got 1000/1000 the question was same as 9tut but IP address scheme were different I did not enter passive-interface command
where is wildcardmask
Hi Enzo,
Your not alone. I recently didn’t pass the exam either & feel this sim question & one other was the reason. 9tut is really helping me build for my next attempt!
can someone shine some light on “passive-interface command” who would I know that I have to use it and where?
Thanks, taking ccna in 4 days
The passive-interface command should be used on all interfaces that have hosts connected and also on the s1/0 interface of router R1 to prevent routing updates from exiting those interfaces. But as far as I know the only question that is graded is to “fix” the connection between R3 and R1. They do not add points for adding “passive-interface” command
I executed “show running-config” in router 3 and the result is something like this “no service timestamps log datetime msec”
I faced this problem in other downloaded practice sims too, everything works as described except the “running-config” command. Can you please explain me a solution? Thanks in advance!
Do we need the wild card mask for advertisement???
Passed 640-802 today w/ 907 score! Thank You God, Thank You God, Thank You God!
I got VTP, ACL2, and EIGRP with the “no passive-interface s1/0” between R1 and R4. Tried to remove it with the “no passive-interface s1/0” but it did not work! Instead, I removed the whole router eigrp 212 and rebuilt it again with all the active interfaces +(no auto-summary); after that, were able to establish adjancencies and PINGs to all routers from R3. Don’t know why the “no passive-interface s1/0” did not work…but, I got through the SIM with a good score……..hope this helps y’all
yes bro George ..
my first time fail just like this fault ..
I can’t remove passive interface in router eigrp 212
but just in minutes it’s fully working without remove passive interface
I dun know how they work .. i get in 92% of routing
fail with ACL 0% for extra 1 acl and they give me like that
so hate …
I pass ccna today. I got this sim, vtp and acl2. Be carefull, i got today eigrp 12 and totaly different ip addreses…. Thanks 9tut, great work
do we really need to save????
Does anybody know some good site like 9tut for CCNP?
Hi all,
Passed today with 960/1000 by God’s Grace. Sims are VTP, ACL2 and EIGRP. IP addresses in EIGRP and ACL are different. concept is the same. In VTP, port numbers are different. Thank you 9tut for your assistance.
Hi everyone,
Passed on the 26th July with 933/1000. Sims were Eigrp, ACL2 and VTP all modified slightly. I just wanna thank God so much. Thank you, Thank You, Thank you and Thank you 9tut.
Does anyone else have any problem loading this EIGRP sim into packet tracer? I was able to load other sim’s but the EIGRP keeps saying that I need a different version of packet tracer. I tried version 5.3 and 5.3.1 and none worked.
I will be taking the test this Tue pleas help!
Today I passed the CCNA exam. This site was really helpful. I was presented with 50 questions in total total 3 labs
- Access list just as in the example explain by 9 tut (Using extended ACL allowing only one host to connect the HR server)
- EIGRP Similar to this lab but instead they changed the AS to 23, be prepare to learn the concepts do not memorize the labs.
- VTP very similar too, but they changed the format for some of the questions.
- Not many questions for IPV6 max 2
I recommend to study the VCEs excellent dumps @ examcollection.com
Hope this helps for someone else
@ JAIMILO
Cong..
please how the calculation of exam marks?
I mean multiple choice = ??
sim ?
drag and drop ?
I want to know the weight if i didn’t make good in one subject can I pass ?
please send me answer hebbo7@yahoo.com
thanks
Can somebody send me the most up to date vcds z3r0s0ulz@gmail.com thx.
CCNA EIGRP LAB Question BY Mr.Mast
http://www.youtube.com/watch?v=-NmNOedFchA
thanks
CCNA EIGRP LAB Question BY Mr.Mast From Thailand
http://www.youtube.com/watch?v=-NmNOedFchA
thanks
hey guys, I have failed my exam yesterday with 643/1000. I didn’t know about this site until this morning… wow i must say you guys are doing a great job! I had EIGRP, VTP and ACL sim.
Just a quick question about the router 3
why are we advertising only two routes? why not three?
fa0/0
fa0/1
fa1/0
Please clarify the question
Thank you
@Zez
hi, i think we are doing this cause we are advertising routes with out giving wildcard bits.
like if we do “network 192.168.60.0″ only. it covers the whole 255 hosts. i.e host 1 and 2
3 routes will be given specifically when we will use wildcard command too.
like “network 192.168.60.64 0.0.0.3″ and “network 192.168.60.80 0.0.0.3″
remember wildcard mask is inverse of subnet mask. “subnet mask – 255.255.255.255 = wild card mask. i.e
255.255.255.255
-255.255.255.252
———————
0.0.0.3
Thank you for everthing 9tut!!
I passed my exam 907/1000
VTP Sim, EIGRP and ACL 2
Also, I saw a few question about frame relay I havent seen before – be careful
Hi there!
Can someone tell me more about the exam simulations. There are only questions that must be answered with the help of the SHOW command or I need to configure anything? I’m worried because the second takes too much time.
Can anyone that has taken the exam tell me which section of the exam is the EIGRP lab on the examination score report?
Thank God and 9tut, I passed today!
Same sims: VTP Sim, EIGRP and ACL 2; different ip addresses.
Hi friends,
Passed the exam yesterday 960/1000, thanks GOD, 9tut (questions and labs) and spike.
Sims: ACL2 (host B web access), VTP same as here but different ips and eigrp, grasp the concepts and you are good to go.
Why are the networks on R3 not advertised as;
Network 192.168.77.32 0.0.0.3
Network 192.168.60.64 0.0.0.15
hw wil i get to know that is there passive interface or not????????????
Hi, I took the CCNA exam and didn’t pass before 6 days. I have scheduled now to take again after a day. Can I get the same LAB questions or different? What do you recommend me.
Thanks in advance
I just passed the Test .. got 894 out of 1000 … some modifications in the labs .. First of all …. those how does not know if question mark ? work to complete a command .. does not work .. either TAB……. Study the commands ..
Now ..
3 LABS .. EIGRP , ACLS AND VTP
IN EIGRP .. THE AS WAS DIFFERENT, MAIN ROUTER or R1 got a network that was not listed as neighbor, and also was missing a network to ROUTER R3 … in router r3 I change the AS and add a neighbor from R1
IN VTP .. There is a bug , the question ……….From which switch did Sw-Ac3 receive VLAN information ?
show vtp status command did not show any ip address … so I was not able to detect how was the switch … I failed this question ..
Some questions show in the test..
What ports on Sw-AC3 are operating has trunks
Which switch is the root bridge for VLAN 1
the default-gateway for the host connected to interface fa 0/4 of SW-Ac3
SwX was taken out of the production network for maintenance. It will be reconnected to the Fa 0/16 port of Sw-Ac3. What happens to the network when it is reconnected and a trunk exists between the two switches?
This last question .. was inverse .. the x switch got a lower revision … the other switch got a higher revision • .. therefore the vlans present on it will stay .. so X vlans will be remove cause the other switch was the modifier
And in the last Lab .. Which was the ACL ..
Only host A will access financial serve through port 80 permit tcp host …host … eq 80
deny any host to access public server Deny Ip any host ……….
and permit any communication with the rest of the servers permit IP Any Any
Thanks 9 tut .. I helped a lot to get this certification!! so I want to share with the rest and help as much I as can !!! Any question just let me know
I just passed the Test .. got 894 out of 1000 … some modifications in the labs .. First of all …. those how does not know if question mark ? work to complete a command .. does not work .. either TAB……. Study the commands ..
Now ..
3 LABS .. EIGRP , ACLS AND VTP
IN EIGRP .. THE AS WAS DIFFERENT, MAIN ROUTER or R1 got a network that was not listed as neighbor, and also was missing a network to ROUTER R3 … in router r3 I change the AS and add a neighbor from R1
IN VTP .. There is a bug , the question ……….From which switch did Sw-Ac3 receive VLAN information ?
show vtp status command did not show any ip address … so I was not able to detect how was the switch … I failed this question ..
Some questions show in the test..
What ports on Sw-AC3 are operating has trunks
Which switch is the root bridge for VLAN 1
the default-gateway for the host connected to interface fa 0/4 of SW-Ac3
SwX was taken out of the production network for maintenance. It will be reconnected to the Fa 0/16 port of Sw-Ac3. What happens to the network when it is reconnected and a trunk exists between the two switches?
This last question .. was inverse .. the x switch got a lower revision … the other switch got a higher revision • .. therefore the vlans present on it will stay .. so X vlans will be remove cause the other switch was the modifier
And in the last Lab .. Which was the ACL ..
Only host A will access financial serve through port 80 permit tcp host …host … eq 80
deny any host to access public server Deny Ip any host ……….
and permit any communication with the rest of the servers permit IP Any Any
Thanks 9 tut .. I helped a lot to get this certification!! so I want to share with the rest and help as much I as can !!! Any question just let me know
@djcracky: Do you have to remove the network that was not listed as a neighbor?
987/1000, VTP, EIGRP, and ACL2.
EIGRP was identical with AS 212. Had to correct the one router and then add the appropriate network statements on R1.
Tab and short commands work.
Spike and 9tut 100%, but still understand the content.
what is the passing score?
Please please please guys i am preparing for the exam next week. Can someone be kind enough to send me the latest dumps on my e-mail : vesuvi@outlook.com
Why are not use wildcards for the networks of r3.
Just passed today!
942/1000
VTP, EIGRP and ACL2
References:
CBT
Vambar
Spike Dumps
Had issue in EIGRP Sim, be cautions of passive interfaces. I had to remove the whole eigrp and reconfigure it. Passive on Serial should be just fine. Good luck to all!!
Can anyone confirm if ? and Tab doesn’t work in the CLI on the labs for this Cert?
I passed ccna tdy..thnks to 9tut fr the best guiding in ccna
i must say this is the best forum for CCNA must pass candidates…kudos to you all.. i am yet to seat for the CCNA cert..hvn in mind the sept.30th deadline. please can you please send me latest dump so u too can be part of my succeses story..thank you in anticipation of your goodwill.
my email lakelvins@yahoo.com
hi guys!
i am taking may exam in the next 2 weeks.. please send me the latest dumps ai_2112@hotmail.com
Yes jbctwin1 … I had to removed the network that was not list as neighbor !!
Does anyone know how many questions are truly on the exam? +3 Labs??? thx
Hi All,
Passed today 954/1000 1st time.
Had the ACL 2, EIGRP LAB Sim and a few drag and drops.
I had access to the tab command and ? worked too, which I was concerned about.
Study all of the sims in depth, take note of all the comments in the bottom of each sim for tips.
I used the Brain dumps from here on my IPAD running VCE (http://www.examcollection.com/cisco_exams.html)
Good luck all.
@dcracky: Thank you for responding!
Just passed my ccna with 973, thanks all
Eigrp,vtp and acl 2 were on the exam
In eigrp r4 was missconfigured and on the central router there was wrong network statement, wrong ip for r4, there was some bug in the software as after i ran cop r s command r4 stopped responding so i couldnt even double check if i made it right
Good luck all, study sim labs and remember to have a look at all variations of acl 2 sim lab