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)
please how can you determine that a link b/w R1 & R2 , R3 & R4 please which command should be used to know if an interface is configure with a passive interface please help me !!
passed today with 854/1000.
labs were acl2,eigrp and vtp exactly as from this site. the show mac-address-table command on the sw on vtp lab was rejected and i failed to examine the mac address table of the switch 3.i dont know if there is any other command which will give us the mac address table. if so then study it. there were 47q and three labs only.9tut,spike662q and shekah are the sources.
many thanks to 9tut,spike662q and shekah697q
study the materials guys,you will pass also
I`M i going to study on vtp eigrp and access-list forgetting about the other labs on this site
I myself i have try that same command in show mac-address-table on packet tracer for switch 3 and it didn`t work let 9tut try to give us another command that can be used ?
one concern I have on the eigrp lab
when you add the network why no wild card is added ?
Just passed my CCNA exam today. Thanks to everybody that posted their experience and also 9tut members. I read Sekhar dumps twice but there are new questions that are not in Sekhar dumps. maybe another dump will do.
Sims are VTP, EIGRP, ACL. You need to read and understand the sims in 9tut very well.
In ACL, Permit host B access to finance web server via http i.e. permit tcp host 192. 168.x.x host 172.22.x.x eq 80
deny any other access from host B from accessing finance server i.e. deny ip host 192.168.x.x hos 172.22.x.x
permit any other
In VTP, mac-address-table is not working, I used mac address-table. The Conf Revision in SwX was 7, then Conf Rev in Sw Ac3 looks like 8 or 6 but I choose 8 after proper look, which means that the default, student, admin and faculty will remain the switch
EIGRP has passive interface but on the s1/0, so I didn’t remove it.
Networks 192.168.60.0 and 192.168.77.0 didn’t appear on R1, so added the 2 networks
If mac-address-table didn’t work, try mac-address-table or mac address-table. One of them will work.
You can download packet tracer 6.0 to practice eigrp if 5.3 doesn’t open.
Hello everyone,
Im facing a compatibility problem of packet tracer v5.3 with this sim..since v5.3 is the stable release i was wondering if this was some other problem than not upgrading to v6..help would be much appreciated!
show mac address-table
hi all
any one can explain how to remove the Passive Interface ???
thanks
Passed yesterday with a perfect score of 1000/1000.
50 questions all in all with VTP, EIGRP, and ACL2 from it.
Thanks 9tut, sekhar, spike, and brar.
same problem here, i cannot run this sim using v5.3.2.0027, any help. thanks
@ amal jose. just download 5.3.3 or 6.0 version. it is working fine.
version 5.3.3.0019
same problem. my packet tracer can’t open this. If anyone was able to open this sim, what version are you using?
I found this site just yesterday and passed CCNA today with 920/1000. I was examined with EIGRP, ACL and VTP. Thanks to 9tut! Dumps helped a lot but new questions are all solvable if you have knowledge.
i need latest dhump,, if any one have, pls send it to baluraj413@gmail.com……………………
I just want to know that can we use “TAB” or “?” in the CCNA exam ?
and to those people who had passed CCNA may i know what was the scenario give to you in EIGRP ACL and VTP ?
Thank u
i have some query in my mind .. some of my friends who had passed in CCNA told me that you have to save your lab by copy running-config startup-config in the end if you dont then you wont get any marks and i have also heard that as soon as you finish the last question you will get the results right in front of you like BOOOM !!!! .. I want to know that is true or not ..
hey ,
will first of all i passed CCNA certification today with 881/1000 :-)
1- EIGRP Sim. has been changed to EIGRP 212 instead of 22 with the same configuration so don’t be scared :)
2- I recommend using 9tut.com site and examcollection.com site for the exam . I’m also JNCIA certified and I recommend using examcollection site very much .
thanks alot 9tut . !! I’ll return when i’m ready for CCNP certification :)
Some (not all) of the .pkt files for the lab sims do now work for me. I get a message that this file is not compatible with the version of Packet Tracer I have. I am running Packet Tracer 5.3.2.0027.
The most recent files I cannot read are…
9tut.com_CCNA_EIGRP_sim_question.pkt and 9tut.com_CCNA_EIGRP_sim_question_Answered.pkt
My research indicates that perhaps .pka files would be more compatible with this version of Packet Tracer….any suggestions appreciated.
Thanks
Norman
hello 9tut.
Just want to ask how to remove the passive interface in EIGRP?
very nice sim on eigrp.
Eagle, yes you can use “TAB” and “?”. They both work during the examination.
Eagle, I don’t know what happens if you don’t save configuration, but suggestion is just take a second and save it :D…about results it’s true you will experience that heartbreaking second to see if you pass or not.
@nuebe09,
you should know by now that usually commands are removed by using ‘no’ infront of the command.
eg:
Rx(config)#router eigrp 212
Rx(config-router)# no passive-interface fa0/1
@Nimal,
Hi Nimal can you give a problem that has an passive interface? so that i can execute the commands?
Thanks.
hey everyone, even with the answered eigrp implementation you cant ping to other routers like R2 and R4….is there anythin else we have to do?
Why is no “WILDCARD USED” can somebody please answer this that has passed the exam. TY
how do I config router 3 !! shall I use telnet from R1 to R3 ??
is router 3 has a console host com ?? please This is my first time to do the exam and my exam tomorrow and I do not have an idea about sim labs
I struggled with this question, stupid me didn’t take notice of the passive interface on the interface !!
@Kabir
The PC is connected to the router via a console cable. Click on the PC and you will enter the CLI of router 3 look at the diagram :)
@Spider please send me the dumps you used for the exam. akaarisak@gmail.com. If anyone else that passed has the latest dump please send it to me ASAP. I am taking my exam in 3 days. So far I have been using 9tut for everything.
Thanks.
File paceket tracer EIGRP does not work why?
Hi, did anyone try? It was easy questions?
Passed today,973
Thanks for everyone here.
Router 1 and Router 3 have a Console Connection. For Router 1 its PC G and for Router 3 its PC D!
Passed with 973… eigrp has some bugs so be careful while handling the cli (DON’T GET NERVOUS)… always ensure that all networks are specified in the routing table of all router or else add them too (THAT’S ALL)… also study variants of ACL 2… don’t worry about NAT (that’s not going to come)… rest are in the hands of god… so pray well and appear with confidence… ALL THE BEST TO ALL!
passed the exam yesterday with 986 there is a bug in this sim when you try to ping the isp router from either router its not pingable so dont panic at all thats fine i got 100 % in acl thanks 9tut
Hi All,
passed yesterday with 933/1000.. I studied Cisco.Acme.640-802.v2013-08-06.by.Acme.649q.vce dumps and its 100% valid and i got only one new question out of this dump. Simulations were VTP, ACL, EIGRP with AS 222 and one Passive Interface towards the ISP.
hi
why ? not Type ” no auto-summary ”
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
????????????????????????????????
In eigrp how do you remove a wrong network from advertising eigrp
can you give the exact command
could you please answer this questions for me Please!!
1) In the sims after I put copy running-config startup – config do you hit enter or space bar to save it. please answer clearly.
2)I hear lot of comments about the tab key. Is this to auto complete the commands in labs?
If I use is it ok or will the take points off?
3) What is the ? for in lab sims and when is it necessary to use it
please answer
clock TAB not work …
you do commands complate type
command copy running-config startup – config In the end, it is important
lab sim … ACL2 ,,, EIGRP ,,,, VTP … to site 9tut.com very good ….
hello guys, a question …
EIGRP router configuration PERIMETER must be inserted into the network (ISP network 198.0.18.0)??
thank you!
ceci September 8th, 2013 In eigrp how do you remove a wrong network from advertising eigrp
can you give the exact command
could you please answer this questions for me Please!!
1) In the sims after I put copy running-config startup – config do you hit enter or space bar to save it. please answer clearly.
2)I hear lot of comments about the tab key. Is this to auto complete the commands in labs?
If I use is it ok or will the take points off?
3) What is the ? for in lab sims and when is it necessary to use it
please answer
1)Ceci hit ENTER to save file
2) I think the TAB key is auto complete you probably wont need it thought because labs are a few lines.
3) the ? is to show the parameters Example
Router# line vty ?
<— shows up so u have choice 0 to 4 pick one of those and it gets u to the next line
I hope I am right
I don't know about removing advertising. But I would think if you go back to that router and type Router EIGRP 10 or whatever # and retype the network it would overwrite the previous. To remove a wrong EIGRP # say 22 do this
RouterA(Config)#no router EIGRP 22
Hope I help. We can all learn from these comments
**It's a Rubicon**
Vicky where did you get the vce dump. Bet you wont be back to this site since you passed but is it from examcollections.com?
**It’s a Rubicon**
Opening the EIGRP Sim. For those of you having trouble opening this Sim here is how to “fix” the issue. First I am using version 5.3.3.0019 You need to unzip the file which will give you TWO SIM files. Same files but one with answers. Secondly, you need POINT to these files when you are opening from packet tracer. Because the zip file is the root of these two files, when you go to the zip file first to get to the 2 files you will get the ERROR message saying different version. The “FIX” Just move these *unzip* files to a different directory and open from there and it works. I got the error Then I did that and it worked.
**It’s a Rubicon**