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)
can any one help about CCNA dumps contact this email FB ID: Acha Bacha
intelligent_noor@hotmail.com.
For Talha : ICND2
1: Welcome to ICND2 Cisco Certification and Getting the Most From
https://www.youtube.com/watch?v=5Zac31mf7Nw
2: CCNA ICND1 Review Lab Part 1 Base Configurations
https://www.youtube.com/watch?v=vxi3ybhec3M
3: ICND1 Review Lab Part 2 IP Addressing
https://www.youtube.com/watch?v=mGci5zqRdGI
4:ICND1 Review Lab Part 3 OSPF Configuration
https://www.youtube.com/watch?v=dgqAkbstXpA
5: ICND1 Review Lab Part 4 VLAN Configuration
https://www.youtube.com/watch?v=NAJsPILavjU
6: ICND1 Review Lab Part 5 NAT and Security
https://www.youtube.com/watch?v=bEtEI287exE
7: Spanning Tree Protocol Understanding STP
https://www.youtube.com/watch?v=-DxyZxabjxs
8: Spanning Tree Protocol Enhancements to STP
https://www.youtube.com/watch?v=T-vW30vDtuA
9: First Hop Redundancy Protocols Understanding HSRP, VRRP and GLBP
https://www.youtube.com/watch?v=fayMqKooTpw
10 : First Hop Redundancy Protocols Configuring HSRP, VRRP and GLBP
https://www.youtube.com/watch?v=gkKEF96BFmk
11 : First Hop Redundancy Protocols Configuring HSRP, VRRP and GLBP, Part 2
https://www.youtube.com/watch?v=ePkyJsSUSDE
12: Frame Relay Understanding Frame Relay
https://www.youtube.com/watch?v=JzUA8jpHZYw
13: Frame Relay Understanding Frame Relay, Part 2
https://www.youtube.com/watch?v=bpvsctSRRVI
14: Frame Relay Configuring Frame Relay
https://www.youtube.com/watch?v=ISFB2TVZpdk
15: VPNs Understanding Big Picture VPN Concepts
https://www.youtube.com/watch?v=LUP02Hefy2g
16:UnderstandVPNs ing Authentication, Encryption, Hashing
https://www.youtube.com/watch?v=nKLvmGF6TwA
17: EIGRP Distance Vector and Link State Routing Protocols
https://www.youtube.com/watch?v=uQgcRn6IQrU
18: EIGRP The Benefits, Terms and Metrics of EIGRP
https://www.youtube.com/watch?v=8ft3X3d18Ac
19: EIGRP Configuring EIGRP
https://www.youtube.com/watch?v=c08RxiB0Mnc
20 : WAN Understanding WAN Connection Types
https://www.youtube.com/watch?v=iyx0NumZsj8
21:OSPF Concept Review and Neighbor Communication
https://www.youtube.com/watch?v=dUDOyodH3A4
22: OSPF Multi Area Configuration and Verification
https://www.youtube.com/watch?v=K4yvhND7wgs
23: Device Management Configuration, IOS and Licensing Management
https://www.youtube.com/watch?v=tGPfQAaNsb4
24:EtherChannel Bundling Gobs of Bandwidth
https://www.youtube.com/watch?v=BIRT-IqFQY4
25: Device Management SNMP, Syslog and Netflow
https://www.youtube.com/watch?v=UHQ1-UWDtdE
26: IPv6 Concept Review and General Troubleshooting
https://www.youtube.com/watch?v=TOoudPmVOoI
27: IPv6 Routing Protocol Configuration
https://www.youtube.com/watch?v=yjgphD3S6bo
@Usman – So we need to do
R1(config)#ip route 0.0.0.0 0.0.0.0 s1/0
redistribute static
And then do we repeat the same thing on R3 if the question mentions R3 should be able to reach the internet.
Please help. My exam is on the 16th.
Al Hamdulillah ..I pass exam today eigrp 222, acl1 and acl2. total 51 questions. 931/1000
Alhamdulliah,………I have passed exam today with 972/1000
Total questions 51,
Acl,Acl2 end eigrp with some modifications
Work hard it will pay you back
Thanks
Finally got the result of my so many sleepless days and nights which gave me a meaningful Result. A BIG day! for me.I Am very very happy to say that I have just passed my CCNA Cisco Certifications Exam :)
with 958/1000. A God grace to my family, my gf, and my friends who support me, special thanx to Mnet to maam Len, CBTNuggets by Jeremy,subnettingquestions,9tut,examtut,examcollection,Todd Lammle books,wendell odom books,Networking books. CCNP your next :)))))
A static route from R1 to ISP & “ip default-network” command in R1. It said above this is how you setup the static route.
!
ip default-network 198.0.18.0
ip route 0.0.0.0 0.0.0.0 198.0.18.5
!
The ip address for serial 1/0 is 198.0.18.6. Where do those ip addresses come from?
Completed the exam today with labs acl1, acl2 and eigrp. For eigrp, i got passive-interface on R1 connected to ISP. I didn’t bother this since default-network and ip route were already configured. Just change eigrp # on R3 and added network on R1. Almost the same sample as above. ACL2 required to allow web access of host A and permit all (core and LAN) to public web server (IP is provided).
@Latest
For eigrp i had the same question on my exam. You didn’t do anything with the passive-interface? I couldn’t get the routers to communicate with the ISP. i treated it just like the above lab questions… where did you see the default-network and ip route were already configured? ACL2 did you have any troubles with it… i treated it just like the lab question on this site… i couldn’t get just Host A to just communicate using HTTP to Finance Server….
I am just trying to figure what i did wrong
I took the CCNA yesterday.. I failed it again with 807. I had problems with EIGRP. There was a passive-interface between R1 & ISP. I couldn’t get any of the devices to communicate with the ISP. i tried to ping the ip address on S 1/0 that’s connected to the ISP. It wouldn’t communicate at all. All the other routers could communicate except with the ISP. What did i do wrong?
A static route from R1 to ISP & “ip default-network” command in R1. It said above this is how you setup the static route.
!
ip default-network 198.0.18.0
ip route 0.0.0.0 0.0.0.0 198.0.18.5
!
The ip address for serial 1/0 is 198.0.18.6. Where do those ip addresses come from?
and any one explain this for me
found it
R1(config)#ip default-network 198.0.18.0
R1(config)#ip route 0.0.0.0 0.0.0.0 198.0.18.5
198.0.18.5 is ISP serial interface IP
good luck guys….m about to write CCNA with in next week
I hv question when i do this lab sim after finish it i try to ping to ip address…….but it say request time out why is dat
@ Prashan…
Have you checked the IP configurations of the host from where you are trying to ping ??
Try assigning an IP address and default gateway to the host.. Then the Ping will work…
Passive interface is on R1 connected to ISP
ip default-network 198.0.18.0 and ip route 0.0.0.0 0.0.0.0 198.0.18.5 were on R1
On my exam, ip default-network and ip route were properly configured so troubleshooting was almost the same as above. Don’t forget to add the network of R3 to R1.
Latest,
so you had to entered ip default-network 198.0.18.0 and ip route 0.0.0.0 0.0.0.0 198.0.18.5 were on R1?
By the grace of ALLAH Just passed today….ACL 1 same, ACL 2 with 3rd modification (ip changes) and EIGRP with changes Ips.
Others from exam-collection
1. watson
2. Methew …enough.
Need any help contact on skype id azhar.hameed53
Best of luck …!!!
Can i get the latest dumps for CCNA ? I will take my certification soon. Email me at kriogen@kriogen.name
had my exams today and passed. 903/1000
Jeff,
NO, ip default-network 198.0.18.0 and ip route 0.0.0.0 0.0.0.0 198.0.18.5 were already there.
I reviewed Watson and from here, 9tut
Latest,
I couldn’t communicate with the ISP… i tried to ping it and was unsuccessful. i could ping every other router… i am not sure what i did wrong
Hi, do I need to put passive-interface on interfaces vs hosts?
Jeff, you miss redistribute static in R1 config-router
Please send me the latest dumps. My email address is net.deployment@gmail.com.
Thanks
Dumbo,
How should the static be distributed?
Can Any one please tell me what are commands and configuration which have to be done in eigrp lab with all modifications (ie. no passive interface and default-network command ) Please tell cause i have exam this week
in packet tracer what error message will show after if i add
ip default-network 198.0.18.0
ip route 0.0.0.0 0.0.0.0 198.0.18.5
in main router (U.U.U)or(. . .)
I have passed exam yesterday with 972/1000
Total questions 51,
Acl,Acl2 end eigrp with some modifications
all question was on 9tut
Thanks
@9TUT
——-FEEDBACK FROM THE EXAMCOLLECTION.COM————————
refer to the feedback of Adrian from Indonesia
Alhamdulillah
I passed my CCNA 200-120 today score 1000/1000,this dums still valid 100%
278q +32q,thanks examcollection and 9tut.
51 questions including 3 sim:
ACL 1
ACL 2 :
Host A via web to finannce.
Other type of access from host A to finance blocked.
All access from LAN and Core to finance blocked.
All hosts from LAN and Core able to access public web server.
EIGRP :
Different AS number in additional Router.
Add network in Router connected to ISP.
passive interface s1/0 on link connected to ISP, but in cofiguration already have default network and ip route to ISP.
i got bug in simulation, after i add network and change AS number (additional router and interior router), i still can’t ping to ISP from additional router and other router.I tried to add the clock rate in serial interface s1/0 but i can’t because the interface s1/0 invalid. i tried to add redistribute static but the system don’t compatible in this simulation.So i just leave the simulation and alhamdulillah got the perfect score.
Good luck and thx all
@9tut
9tut is it a bug in this EIGRP LAB sim? it is true..? refer to the feedback of Adrian from Indonesia.. he got perfect score although he couldn’t ping to ISP from NEW ROUTER and OTHER ROUTER…
please help me coz my exam will on May 19 .. can you confirm it.. thanks in advance
@jj: You don’t need to ping to the ISP but you must ping among the routers successfully to complete this sim. There is no bug in this sim. Just make sure you understand the concept behind and you will be fine.
hi guys! what command will verify if i have a passive interface?
@almomo Show running-config
thanks @Haris..
in the EIGRP sim question.. Do we really need to ping the ISP? If we are required to reach the ISP then what will be its ip address then?
@almomo you can ping it from R3 router. ping 192.0.18.6
thx harris! i dont see the point of doing the ping to the isp. is it really needed?
Just passed today with 917. Had this simulation but for the life of me, could not get routers to become neighbors. Had EIGRP212 on Central1 which is R1 here. Had EIGRP 22 on Central 2 which is R3 here. Also R1 was not advertising the 192.168.33.16 255.255.255.252 network toward R3. After making all the obvious changes – still no neighbors. Looked at network type, k values, interfaces were up and up, could ping from R3 to R1 interfaces, show ip prot on both said they were advertising teh 192.168.33.16 network. Auto summary was off on both routers. No matter what was done, did not become neighbors. Anyone else had issues getting this to work. Was confident with the process, just did not ever see anything in show ip eigrp neighbors or D routes in R3′s routing table. Frustrating but a pass is a pass.
I got this also in today exam
Its because one extra network was present in R1. I got the same lab in my exam today so first i erased that extra network which was not in the list of R1 Ip addresses and then advertised the network between R1 and R3. I got full marks.
@almomo you should better check it so that you know that all routers are pingable.
Hey guys i tought the ICND2 Had 3LABS but they were a NON-Config meaning just use show commands to find the answer ???? is that not true
@haris. did you use ip default network or ip route 0.0.0.0.. in your configuration? or you just add the isp network on eigrp 222. i am doing the exam today.. thx!
The question regarding the pinging of the ISP router, it is not a requirement to ping the ISP, the only thing that is mentioned is, being able to ping each of the routers, also mentions that if there is a passive interface noted on any of the routers, you are to get rid of them with the no passive-interface command. I am not sure what all of the questions are about having to ping the ISP, the ISP should not be included in the EIGRP network.
@GG well said
Pass today with score 1000. The dumbs examtut and mathew
Acl,acl2 with mod.eigrp topology mod and ips.
pass today with 986/1000. i dont know what i did wrong. new question etherchannel and ospf network.. labs are easy if you know the concept..:)
clear ccna today LABs were eigrp and ACL
@george germany any new questions in the exam?
not really. all the questions from the dumbs examtut, mathew, watson. you dont need more!!