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)
I failed the test yesterday with a score of 749. This sim is was not the same. I had to configure 2 router with the AS 2. All three router were missing 1 net statement ( the network that connected the routers). All had staic routes to each other.
@all
plz help me in 2 eq. & give me correct ans…
Which command will show the MAC addresses of stations connected to switch ports?
A. show mac-address
B. show arp
C. show table
D. show switchport
Refer to the exhibit. After a RIP route is marked invalid on Router_1, how much time will elapse before that
route is removed from the routing table?
A. 30 seconds
B. 60 seconds
C. 90 seconds
D. 180 seconds
E. 240 seconds
Answer: B
plz send me correct ans???????????
@RAJEN: A, B
friends plzzz read Drag and Drop Question…..b’case in the exam 5 ya 6 Drag and Drop Question in paper…
CAN ANYONE ANSWER THE CORRECT ANSWER OF EIGRP LAB STEP BY STEP
pls in the EIGRP lab why is it that the wildcard mask was not entered in the commands???
@RAJEN
Hi
do some search, you find out the answers!
practice these questions, read aout them and you will find the right answer.
RIP Timers
In addition to the update timer, the IOS implements three additional timers for RIP:
• Invalid
• Flush
• Holddown
Invalid Timer. If an update has not been received to refresh an existing route after 180 seconds (the default), the route is marked as invalid by setting the metric to 16. The route is retained احتفظ in the routing table until the flush timer expires.
Flush Timer. By default, the flush timer is set for 240 seconds, which is 60 seconds longer than the invalid timer. When the flush timer expires, the route is removed from the routing table.
Holddown Timer. This timer stabilizes ثبت routing information and helps prevent routing loops during periods when the topology is converging on new information. Once a route is marked as unreachable, it must stay in holddown long enough for all routers in the topology to learn about the unreachable network. By default, the holddown timer is set for 180 seconds.
Question about EIGRP sim Lab:
This may sound silly but once you have completed the lab requirements for the eigrp lab and are ready to test the network, do you need to ping every interface of every router from each router for maximum points?
or
Just ping one of the interfaces on each router from R3, say ping
R2 Fa0/0 from R3
R4 Fa0/1 from R3
R1 S1/0 from R3
Would be great to see your comments please. thanks.
I passed CCNA today with 973/1000. thanks 9tut..
Labs were VTP, ACL2 and EIGRP
@axl
There isn’t anything like maximum points. It is a good practice to do a pink, just so you can be sure and certain everything is working as it should. Also, it helps you to narrow down any inconsistencies, if there are any………….
@RAJEN
plz help me in 2 eq. & give me correct ans…
Which command will show the MAC addresses of stations connected to switch ports?
A. show mac-address
B. show arp
C. show table
D. show switchport
Refer to the exhibit. After a RIP route is marked invalid on Router_1, how much time will elapse before that
route is removed from the routing table?
A. 30 seconds
B. 60 seconds
C. 90 seconds
D. 180 seconds
E. 240 seconds
B.show arp (there’s no show mac-address command, theres a show mac-address-table command)
B.60 seconds
Any valid dumps would greatly be appreciated. Testing very soon. Thanks a million….. sthrnrogue@gmail.com
This SIm and all questions are up to date or old one?
why a cannot ping from R3 to ISP? pinging 198.0.18.5
i can ping this address only from R1
i cannot ping this address from R1 with expanded options and source address 192.168.77.33 (which F0/0 int of R1)
Help plz!
Thnx!
I failed today with 735/1000, reason is this EIGRP lab came up, ip addressing was identical pretty much. There was an extra network on R1 which seemed to be useless so I removed it, an adjacency went down but I continued. I sware now I put everything in correctly I mean this in theory is not hard. There were no passive interfaces except R1 to ISP. All interfaces were up and seem to all have matching IP address to that given. However when putting in network statements even with no auto-summary the show run would give a classfull summary network statement. and a different network statement would modify itself to classfull summary with an 0.0.0.3 wildcard(which made it incorrect due to the classfull summary). ip classless was in the running config also and it again showed no auto-summary. I eventually used wildcard masks (repeatedly added i might add)for every network statement on both routers and got the correct network statements in the running config…no sign of routing updates on either R1 or R3. I must have spent a good 25 mins on this and therefore did not finish the last 6-8 questions and rushed the last 10-15. costing me a pass. If there was a way I would love to dispute there was a glitch in there somewhere!
IMPORTANT ADVICE…as it says in the tips section of this site, do not get hung up on these, maximum 15 mins per sim and MOVE ON!! P.S. other sims were VTP sim and ACL2 of which I aced both of them and in record time..still didn’t make up for time lost though!
I passed the 640-802 today, after having failed it with an 815 last month, which super sucked because those missing ten points cost me an exter $300. But I kept it moving took the test again today and passed with an 894. For me the failed attempt actually helped because it made me more able to manage my anxiety which I believe is why I failed the first time – we are talking total freak out brain wont work…
Anywho, I mostly used how2pass to prepare, and then brused up with specifics from 9tut so I would know what to expect during the test. The sims are comparable but in my opinion not exact. However, if you understand the theory behind them you would do well. Good luck.
Marcy
Matt, that question caught me up for 45 minutes last time around. The problem I think was with the way the question was written. I made you think everything was all good with all the routers in the topology except the newly added one. I put the network statements in classful, but after I bombed last time I figured out that the problem was a missing network statement on city1′s router. City1s router also had an extra network statement that didnt appear to belong there but I just left it there since it didnt impact the config of City2. Also City2 had the wrong AS which prohibited the two from forming an adjacency. I think the first time around City1 also had a shutdown interface, but not this time. Next time around,
1. Verify all IP addresses as correct on the 2 routers involved.
2. verify that both sides of the link are up for the 2 routers involved (no shutdown)
3. make sure both routers are in the same AS, the one the exam tells you about in the instructions.
4. make sure that both routers are advertising all the attached networks, especially for the link between them.
5. Don’t worry about configuring EIGRP for classes routing (no wildcard mask), thats not a factor in the question.
Good luck.
TIP: When preparing for the exam its really important to learn how and where to find information, they like to give you a mac address and then ask you things like out of which port will a frame be forwarded…so its important to know the series of command that will lead you to the information you want ie.:
show mac address table to identify port and vlan association,
show cdp neighbors detail to find out ip addresses of directly connected devices,
show vlan to see which ports belong to which vlans,
show interface trunk to see which ports are trunking.
Hi Hip, Hip, hooray. no joke i deffo did all of that….i actually redid the network statements on both routers in the end and the only way i could get it to not summarise classfully was to use wildcard masks for each one. and lets not forget when i add a network statement the running config shows an untouched network statement had magically classfully summarised itself and given ITSELF a wildard mask based on the address making the network incorrect i.e. 192.168.60.64 had now become 192.168.60.0 0.0.0.3 of course meaning it was now a totally different network. all interfaces were up and active. the fact i made all the network statements correct with the wildcard masks means at least R1 and R3 should of advertised some routes…but no nothing! i sware the question is faulty I have emailed off the testing center saying i want to dispute it…even if i still didnt quite get a pass i think there is a problem that needs sorting!
deffo dont touch the mysterious non existant network that seems to have an adjacency either!
The easy way to pass ccna,understand the lab questions very well. Study ur dump,i will prefer jericho and 9tut for the lab. This help me alot. I wish u all writing next week success.
On EIGR after configuring R3 how do u exit to configure R1?pls help
Hi guys took the exams 2 days ago.. Passed with 933 thank god first and Thank you sooo much 9tute, hats off to u. Guys stick to 9tute sims and practice all sims ,labs were ACL2,VTP,EIGRP..
There is some modifications in VTP . Acl practice the same and see the some modification area in this ACL sim thats enough and EIGRP also . The dumps were still valid 3 or 4 new questions and the drag and drops were the same… Practice the VTP VERY WELL REMEBER THE SHOW COMMAND.. Thanks again 9tute..u made me undestand and pass CCNA
i didn’t see passive interface in this lab plz anybody tell me where i can remove passive interface????????????????????????????????????
In the Exam, We are supposed to click on the Console to get to the routers. Same for ACL Lab.
My question is, after clicking on the console.. Will you get same command interface as you get in routers??? ex: Router> ?
Hi, can somebody send me the Packet tracer software please. farzad421@gmail.com
Done my exam today with 960/1000 Praises to God and thanks 9 tut for the SIMS Guide.
The SIMS were ACL 2:
- Host D access via HTTP to finance web server
- Other types of access from host D to the Finance Web Server should be blocked
- All access from hosts in the Core or local LAN to the Finance Web Server should be blocked
- All hosts in the Core and local LAN should be able to access the Public Web Server
My Commands:
access-list 100 permit tcp host 192.168.44.4 host 172.22.242.23 eq 80
access-list 100 deny ip any host 172.22.242.23
access-list 100 permit ip any any
I scored 100% using these commands for ACL
Also have EIGRP and VTP with some minor changes like EIGRP AS number is different and different ip address, VTP different mac address and Sw-Ac3 revision number was higher than Swx
The questions are mostly from Collisio 486 dump except about 4-5 new questions, for all those taking CCNA exam I encourage you to study Collisio 486 dump and also the SIMS on 9 Tut, just these two will be more than sufficient to pass the exam.
For the 9 Tut Sims please do study and understand the commands and not memorise blindly because there will be some minor changes in exam and the VTP sim order in exam is random so make sure you know all your commands by heart and understand what individual command does.
Collisio 486 dump has some wrong answers and I have identified them and uploaded onto a powerpoint file which you can download here http://www.filedropper.com/answers and for those want the latest dump just grab and study the collision 486 dump and make sure you memorise the answers and NOT THE ORDER because ORDER OF ANSWERS WILL CHANGE IN EXAM. download latest dump collisio 486 here http://www.filedropper.com/ciscoacme640-802v2011-07-09bycollisio486q
If anyone need help just post comments here, I will check here often and try to help as much as possible.
@neha
To check for passive-interface, do a “show running-config” command and look under your configuration statements for EIGRP, if there is passive-interface, the line should look like this:
!
router eigrp 212
passive-interface Serial0/0
network 192.168.36.0
network 192.168.60.0
network 198.0.18.0
no auto-summary
!
Notice that if there is passive-interface, you can actually view the evidence of its existence and also the interface the passive-interface was configured on. To remove it simply do the commands below:
Router>enable
Router#configure terminal
Router(config)#router eigrp 212
Router(config-router)#no passive-interface serial 0/0
After finish typing that above, you should automatically see this notice “%DUAL-5-NBRCHANGE: IP-EIGRP 212: Neighbor 192.168.36.14 (Serial0/0) is up: new adjacency”
To confirm if the passive-interface has been removed, just do a “show running-config” again and double check.
Hope it helps.
@kb
Yes you will see the exact command interface as on the router, because during exam you are not allowed to click on any router to configure anything, only through the console pc.
To all who are looking to download latest dump, Collisio 486 dump is valid and most question from the exam i took today are in here and I passed with 960/1000 only 4-5 new questions cant be found in this dump. Sims still the same as 9 tut except with minor changes. This dump has several wrong answers which my friend and I have identified and you can find them in the pdf i uploaded, see download link below.
Ignore my previous post on the download links, have reupload to another file sharing website and the correct answers is here in this new link
http://www.filefactory.com/file/6iel3iobz3an/n/answers_pdf
http://www.filefactory.com/file/j6n166r9epz/n/Cisco_Acme_640-802_v2011-07-09_by_Collisio_486q_vce
@TerryC
Thanks
is it true the collosion dumps not valid???? there are news somewhere….
@um
I just passed yesterday with 960/1000 and I studied only Collisio 486 dump and 9 tut labs, the Collisio dump is definitely valid as all of my questions yesterday came out from 486 dump except 4-5 new questions which is not found in the dump.
I understand some of you having difficulty downloading the dump and answer i uploaded to filefactory, have uploaded to another place which is easy to download http://dl.dropbox.com/u/72308819/CCNA-Exam.zip
got 907/1000 felt like i ws in a game house 2day…gt some new ques bt notin to be scared of….d labs were;
acl:still d same as 9tut bt wit minor changes in ip address.
VTP;Still d same.
eigrp;d same bt d new router was nt configured at all.
Thanks to God and to u gr8 guys in 9tut….ccnp will go down next. :-)
@alll
I complete my configuration then How can i will be ping to other router?????????
plz give me ans
which are interface i ping?????????
@nasir; click on d host console connected to the router and ping to other routers.
Took CCNA test on April 9th the and the labs were VTP, EIGRP, and ACL2. I studied Jericho 632, all questions were in this dump minus three or four. VTP and EIGRP labs were almost identical to 9tut, and the ACL2 question was the first modification on the ACL2 sim page. Good luck to all!!
Completed CCNA today .. for EIGRP R3 ..even the network is advertised ..sh ip route doesn’t show any thing. take care ..but it correct
hy is any body have lab in which router 1 or(r2,r3,r4) have PASSIVE INTERFACE example???like
!
router eigrp 212
passive-interface Serial0/0
network 192.168.36.0
network 192.168.60.0
network 198.0.18.0
no auto-summary
!
plz mail me
asim_shah@hotmail.com
thnx
@Anonymous
Thanks
right just been doing some experimenting with ip default-network on packet tracer. the default route will NOT be propagated to other routers in the eigrp network unless the redistribute static command is used under router-config mode for eigrp [AS number]. also if the default-network is a connected one then the static route of 0.0.0.0 0.0.0.0 [next hop] still needs to be added to redistributed, the ip default-network command will not put it as a candidate for default route. However if the network is remote and the router has either a static or other route in its table the ip default-network [remote network] command will work and propagate to other routers IF the redistribute static command is used.
im having exam tomorrow. I just wanna ask for the EIGRP sim if it is required to configure ip for the host.
@ TerryC
if v see that “passive-interface s1/0″
that is conected to ISP then wat we have do ?????
pllz ans
thnx
Passed with 9XX
This lab had some changes regarding naming scheme & IP’s don’t get confused.
Main -> R3 (NEW ROUTER ADDED)
Campus -> R1
BD-101/2 -> R2/4
Problem : newly added router Main can’t communicate with ISP.
Additional : An extra network 192.168.7x.x with one of the old routers.
use no network 192.168.7x.x to remove that.
Save configs, check the connectivity and you’re good to go.
Tip : Everything should be good if you’ve configured them in your practice sessions.
Also pay attention to NAT_ACL2 simulation .. don’t just cram learn it. (use permit ip any any in step 3 **kind of a bug in simulation)
10* to 9tut :) ..
Gud luck everyone
@ 9tut
any body help me about “PASSIVE INTERFACE”???
THNX
@ASIM SHAH
Remember this, any link that does not need EIGRP route you can leave the passive-interface, but if the link requires EIGRP route, then you MUST remove passive-interface.
For 9 tut SIM case, because the link between R1 and ISP does not need EIGRP route, hence even if there is passive-interface in serial 1/0, you don’t have to bother about it because the link between R1 and ISP do not need EIGRP route.
Unable to ping ISP 198.0.18.5 from R2, R3 and R4.. how to do this???
plzz help
@ karim
that is because the network associated with 198.0.18.5 is the ISP,
which is the service provider and probably requires the address to be translated which is yet not enabled and is not required.
for that we would be needing NAT.
Anyone please could help. Failed my exam a few days ago and am rescheduling soon. Obtained 815. Got ACL2, EIGRP and VTP sims for my exam which i failed to configure properly. Am i going to have the same sims labs for my next exam or will it be different????
Any reply would be most appreciated.
@vg by removing the network .7x.x.x will the router main be able to connect to the isp or how do i go about it .