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 today due to this question. My fault for not going over these on 9tut. This should have been an easy question. I noticed right away that R3 had the wrong AS. What I normally do is just type “no IP routing” to clear the routing protocols. Sim denied that command. Fine. So I put the no eigrp 22. Then I went in to advertise the networks on R3. Put “net 192.168.48.48 0.0.0.15″ and when I did a show run it would show incorrect information. It would. Hange the networks and the wild card masks I put in. Maybe I didn’t need the wild card masks but it still should have accepted them. So after 45 mins wasted tryin to advertise the routes on R3 and have them show up as I put them in I gave up. I also tried to add “ip route 0.0.0.0 0.0.0.0 fa0/0″ and the Sim gave me an error that that command cannot be used in this sim!!! I hate these sim questions! If they are going to put them in there they need them to work like real routers! Not knowing this 1 question cost me $300! I’m so upset right now!
All which is better to look at Jerchio dumps or Collisio? I noticed Colliso has 487 questions and Jericho has 632 so can anybody say which dump is better?
Passed today with a 920 score. EIGRP sim is exactly the same as above. the new router had an incorrect as# & another router had an incorrect network statement & missing a statement.
No issues with adjacency & no bugs.
Also, had 5/6 drag & drop questions.
Bob,
What was the incorrect network statment? And in regards to missing statment do you mean it was missing the network IP? I haven’t heard of incorrect network statment can you claify? Thanks!
is it enough if u just configure the correct eigrp number
and add the network from router 3 into router 1? for this sim
or do u have to do something more?
I got 100% on this sim.
R1 required a network statement to be removed & a new statement to be added.
As# was incorrect in R3.
read the question correctly because the “new router” in my sim was router 2 rather than R3.
Good luck everyone
bob thnkx :)
Hello I am having issues and I followed the above configurations and cant ping other routers from router 3. From router 3 i am pinging 192.168.60.0 and 192.168.77.0 and getting no pings after i completed the the configs. Can somebody please help me see what i am doing wrong? I will attach the configs of both router 1 and router 3
Router 3 Config:
interface FastEthernet0/0
ip address 192.168.77.34 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.60.65 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet1/0
ip address 192.168.60.81 255.255.255.252
duplex auto
speed auto
!
router eigrp 212
network 192.168.60.0
network 192.168.77.0
no auto-summary
Router 1 config:
nterface FastEthernet0/0
ip address 192.168.77.33 255.255.255.252
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0
ip address 192.168.36.13 255.255.255.252
clock rate 500000
!
interface Serial0/1
ip address 192.168.60.25 255.255.255.252
clock rate 500000
!
interface Serial1/0
ip address 198.0.18.6 255.255.255.252
clock rate 500000
!
router eigrp 212
network 192.168.36.0
network 192.168.60.0
network 198.0.18.0
network 192.168.77.0
no auto-summary
I would appreciate any help.
Should I not be pinging the network IP’s 192.168.60.0 and 192.168.77.0? I thought these were the IP’s of the routers? I CAN ping the interfaces like FE0/0 and FE0/1 so what am i doing wrong. Thanks guys.
@Newbie
Please attach your routing table fro R3
hi friends ,
i cleared ccna exam with 960/1000 if you want any dumps or any
suggestion regarding ccna exam i will
guarantee you that i will respond you
within 2hours
mail me at aman.mim80@gmail.com
Hi Aman , i added u
let us have a quick chat
thanks
Hello can you explain the routing table on router 3? How would I do that? Thanks for your response mike.
@Newbie
show ip route command
Thanks Mike I figured it out. I will attach shortly. Thanks Mike you are always so helpful. I look forward to your help. :)
Mike what I meant was I figured out the command I. Haven’t figured out the issue as to why I can’t ping. I will give my out put shortly so you can help me. Thanks!
Mike,
Here is my output from Router 3
R3#sh ip route
Codes: C – connected, S – static, I – IGRP, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF external type 2, E – EGP
i – IS-IS, L1 – IS-IS level-1, L2 – IS-IS level-2, ia – IS-IS inter area
* – candidate default, U – per-user static route, o – ODR
P – periodic downloaded static route
Gateway of last resort is not set
192.168.60.0/30 is subnetted, 2 subnets
C 192.168.60.64 is directly connected, FastEthernet0/1
C 192.168.60.80 is directly connected, FastEthernet1/0
192.168.77.0/30 is subnetted, 1 subnets
C 192.168.77.32 is directly connected, FastEthernet0/0
@Newbie
Please send me your pkt file, so I can check on packet tracer
mlskrypka@gmail.com
Hey Mike,
I just sent it over to you.
@Newbie
Please send me your pkt file,so that i can check it,i will respond as soon as you do .
THX,here is my mail d_toumany@yahoo.fr
@Newbie
Please check ur mail!
I have passed exam today. I had a same simulations as in here. Big thankx to 9tut (labs were vtp, eigrp and access lists). I also used dumps Collisio. I wish you all success on your ccna exam.
Eddie,
Did you use anything else but Collisio for dumps? Did you see msot questions?
I have passed the exams today with 903, collisio I say a big thank you and also has a little snag with the vtp question…..Also a big thank you to 9tut..you guys are so on point..lab i got was vtp, access list2 and eigrp…you can contact me on zzeepelli@yahoo.com
this lab is copy paste today :)
can anyone sent me the pkt file of lab sim vtp, access list2 and eigrp.. urgently
adeshchavan@rocketmail.com
Falken,
You can download them from this site.
@ RED!
Pass4Sure is valid.
Use the following site to take real time exams to build your speed.
http://freenetworkstudy.com/mainexam
9tut!
I want to thank you for the contributions you provide to enable candidates to prepare for
various exams. CCNP’s three exams are on my near horizon and I am using your resources.
If you need any assistance in preparing any back ground work for your site (s), please
contact me. I visit regularly to keep up with what’s going on.
why we didn’t out a comment : “no network 192.168.36.0 ” for Router 1 , since it should not be there
@all i have practised the above simulation mentioned but atlast how to check ping response to all routers..? this is biggest doubt i have..
@ram
Just ping etch interface IP address
Passed CCNA Yesterday , ACL , EIGRP VTP
my email is shooter131211@gmail.com
send me email and i will send the exact labs by email
Regards
Hi guys,
Passed my CCNA today. 881.Just!
I believe I might have lost some marks on the EIGRP. For some reason I couldn’t get to the core internet router. Didn’t want to take the risk and start fiddling with that. Was able to ping other routers though.
Most questions came from this dump. Sims were ACL2, eigrp & vtp.
Thanks everyone.
i also notice an advertised non – existent network on R1. I didnt remove it because it shouldn’t affect the network. Not sure if this affected my score. What does others think?
Hi guys
Does R3 need this included
router eigrp 212
network 192.168.60.0
network 192.168.70.0
network 198.0.18.0
no auto-summary
do we need to add 198.0.18.0 to make sure we can ping the ISP router as well
Thanks Marc
Marc,
No you don’t need to add that statment.
Hi Anonymous,
So how come I couldnt ping ISP router? what do you think was missing? I was able to ping every other router including R1/ s1/0 interface connected to ISP router but not the ISP router itself
Arp,
What dumps did you use?
Thanks!
Arp,
All other inter connectivity and Internet access for the existing locations of the company are working properly.”
The only goal in this SIM is to have R3 form adjacency with its neighbor (R1). There is no need to ping to other routers because the are “working properly”.
Your ping to ISP will fail due no NAT configuration
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If i have a passive interface what is the commad to remove it from the specified interface? i have exam tomorrow if sombidy could please help with this i would be so thankful.
@anonymous
Remember almost in all cases you can negate any command with “no” + command
Thanks Mike.
i failed last 3weeks ago with 683
i passed today with 920
thanks to jesus, cbtnuggets, pass4sure and of course 9TUT!!!!
Ok, I took exam today and failed. I had 3 interfaces on the new router that was installed and when I looked at the main router I saw none of the interfaces from the new router on the main router should of I added all 3 interfaces on the main router? That’s what I did and no adjacenty among router. I thought on the main router I would have seen at least two of the IP from the new router and I didn’t any help on this would be great. My exam also crashed and they had to restart it and I believe my sim was very bugy.
Thanks.
hi all
I fall today with 669 my problem i did not finish questions. because i blocked with the command no passive-interface serial 1/0. can some one here hel with the good command command
This is messed up on your new router did you have 3 interfaces? I did and i did not see any of the interfasce from the new router on the main router to the ISP? How did your setup look like? Thanks
@ Anonymous
Did you add the route between the new router and the main router, to the main router? That should of gave you instant adjacency, also the no auto-summary command.
@ Anonymous
you do not have to put the no passive serial 1/0 command, the isp does not need to see the internal routes. So having it would not have had a problem.