EIGRP Stub Sim
Question
By increasing the first distant office, JS manufactures has extended their business. They configured the remote office router (R3) from which they can reach all Corporate subnets. In order to raise network stableness and lower the memory usage and broadband utilization to R3, JS manufactures makes use of route summarization together with the EIGRP Stub Routing feature. Another network engineer is responsible for the implementing of this solution. However, in the process of configuring EIGRP stub routing connectivity with the remote network devices off of R3 has been missing.
Presently JS has configured EIGRP on all routers in the network R2, R3, and R4. Your duty is to find and solve the connectivity failure problem with the remote office router R3. You should then configure route summarization only to the distant office router R3 to complete the task after the problem has been solved.
The success of pings from R4 to the R3 LAN interface proves that the fault has been corrected and the R3 IP routing table only contains two 10.0.0.0 subnets.
Answer and Explanation:
First we have to figure out why R3 and R4 can not communicate with each other. Use the show running-config command on router R3
Notice that R3 is configured as a stub receive-only router. The receive-only keyword will restrict the router from sharing any of its routes with any other router in that EIGRP autonomous system. This keyword will also prevent any type of route from being sent.
Therefore we will remove this command and replace it with the eigrp stub command:
R3#configure terminal
R3(config)#router eigrp 123
R3(config-router)#no eigrp stub receive-only
R3(config-router)#eigrp stub
R3(config-router)#end
Now R3 will send updates containing its connected and summary routes to other routers. Notice that the eigrp stub command equals to the eigrp stub connected summary because the connected and summary options are enabled by default.
Next we will configure router R3 so that it has only 2 subnets of 10.0.0.0 network. Use the show ip route command on R3 to view its routing table
R3#show ip route
Because we want the routing table of R3 only have 2 subnets so we have to summary sub-networks at the interface which is connected with R3, the s0/0 interface of R4.
There is one interesting thing about the output of the show ip route shown above: the 10.2.3.0/24, which is a directly connected network of R3. We can’t get rid of it in the routing table no matter what technique we use to summary the networks. Therefore, to make the routing table of R3 has only 2 subnets we have to summary other subnets into one subnet.
In the output if we don’t see the summary line (like 10.0.0.0/8 is a summary…) then we should use the command ip summary-address eigrp 123 10.2.0.0 255.255.0.0 so that all the ping can work well.
In conclusion, we will use the ip summary-address eigrp 123 10.2.0.0 255.255.0.0 at the interface s0/0 of R4 to summary.
R4>enable
R4#configure terminal
R4(config)#interface s0/0
R4(config-if)#ip summary-address eigrp 123 10.2.0.0 255.255.0.0
Now we jump back to R3 and use the show ip route command to verify the effect, the output is shown below:
(But please notice that the ip addresses and the subnet masks in your real exam might be different so you might use different ones to solve this question)
But in your real exam, if you see the line “10.0.0.0/8 is a summary,….Null0″ then you need to summary using the network 10.0.0.0/8 with the command “ip summary-address eigrp 123 10.0.0.0 255.0.0.0″ . This configuration is less optimize than the first but it summaries into 2 subnets as the question requires (maybe you will not see this case, don’t worry!).
The command “copy running-config startup-config” will not work so try using this command; just skip if it doesn’t work.
Other lab-sims on this site:
Falcon
I did what Axel Tadoy did..and then I saw 2 subnets…and it works…BTW there is new test on the exam definitely a bug issue on the exam.
Hi. on 21 st feb i cleared my route exam with 918 marks. thanks to god jeasus.
In the exam this sim I applied summary like this 10.2.0.0 255.255.0.0 but when i saw sh ip route in R3 router it shows only one subnet. i tried for 10.0.0.0 255.0.0.0 but it shows same. So i removed this and kept 10.2.0.0 255.255.0.0 and closed it. there is a bug issues in the sims.
Finally i got 100% in the EIGRP area. means marks are allotted fully. So dont worry if it not shows 2 subnets also. but it will need to show 1 subnet surely. All the best for who r going to write exam…thank you.
first of all….thanks to almighty god…alhamdulillah…
passed with maximum marks…
study this….dnt worry…
i got all five labs…
everything is perfect here…
first of al…i got full marks in lab..
actually… i didnt summarize the routes as said it here……
.
.
but it was there in the question…
so…dont go without testing…
i think i juz got lucky..
kishore, you probably did “sho ip route eigrp” and not “sho ip route”, because the connected(code C) will always show up, while the eigrp learned summary route will come up as EIGRP (code D)
passed today with 988
I followed all but it was not possible to see just 2 subnets for 10.0.0.0. I tried all and retype the commands three times and still shows 1 subnet…
Anyway the lab is still valid
Please provide a Sim files in Packet tracer format……..? If you have please send me on sridhar.bb@hotmail.com
hallo! danke. danke ja? danke!
download all labs from here….
http://search.4shared.com/postDownload/MNxMccev/GNS3_642-902_Test_Sims.html
In Route Exam, but on R2 there was a loopback address. On R4, the loopback address of R2 shows as EIGRP neighbour, but no EIGRP routes are exchanged between R2 and R4. Can’t change anything on R2. Is this a bug or is there something new you have to disable on R4 to get it to work. Will check for auto summary, but that shouldn’t stop all routes. Anyone seen this modified version of the same question?
Other than that the question is identical and asks for the same things, make routing work and ensure only 2 10.0.x.y routes are in the routing table.
First Thanks to Almighty GOD.
Passed today with 941/1000.
Got all 5 LABS. 3 Drag and Drop.
Thanks to Digital tut. You Rock Man!!!
Hey, now that copy run start doesnt work, what should one use to save the simulations?
@Joyce, if it doesn’t work, then there’s nothing you can do, except leave it or note it in the comments section/box like someone mentioned.
would ip summary-address eigrp 123 10.2.0.0 255.255.240.0 not be a better answer here?
it does the same thing but saves many more ips.
It
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, FastEthernet0/0
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
D 10.2.0.0/20 [90/2297856] via 10.2.3.4, 00:05:02, Serial0/0
C 10.2.3.0/24 is directly connected, Serial0/0
I verified this in GNS
Passed today with 950 today. I got all 5 Labs, Drag and drop, and MC questions from Peter were pretty much the same as on the real exam.
A big thanks to digitaltut and their awesome website.
Hi All,
I attended my exam on 14th March and passed with good score, I went through 360q.vce.file. and almost got all the questions from this dump only, got the same 5 Simulations (EIGRP OSPF Redistribution Sim, Policy Based Routing Sim, IPv6 OSPF Virtual Link Sim, EIGRP Stub Sim and OSPF Sim), dint get ospf hot spot or Eigrp simlet.
guys i have a conflict here as a result of sh ip route we can see 8 network which mean if we want to summarize them we need 3-bits so 24_3=/21 why the mask here is /16 i dont understand
Thanks exam collection and digitaltut! The dumps from exam collection — Igor 395q & boyi 411q are still valid . The sim from digitaltut are still valid — only the ip address, ospf process id, eigrp as number, interface name are changed.
DigitalTut is valid 941/1000, but please learn concepts
Received all Sims (OSPF, OSPF EIGRP Redis, EIGRP Stub, IPV6, PBR)
*Copy Run Start works on OSPF Sim, all other Sims it still works so try because otherwise it could be a Cisco curveball
*Multiple-Choice answers were shuffled
*Redistribute OSPF Sim, couldn’t perform Telnet command like it asked in the scenario…said command wasn’t implemented….could ping but not telnet, so just went to next question after ping
“But in your real exam, if you see the line “10.0.0.0/8 is a summary,….Null0″ then you need to summary using the network 10.0.0.0/8 with the command “ip summary-address eigrp 123 10.0.0.0 255.0.0.0″ . This configuration is less optimize than the first but it summaries into 2 subnets as the question requires (maybe you will not see this case, don’t worry!).”
I don’t think this is true, guys. If you do this you won’y be able to ping to any of the loopbacks(10.2.4.0, 10.2.5.0, etc.) you would have only a discard route for 10.0.0.0/8 to Null0. So I believe in this case you should just stop auto-summarization ot R3 with no auto-summary and you will have 10.2.0.0/16 or 10.0.0.0/8 summary address from R4.
Good luck.
hi friends please send me latest dumps of ccnp …….
and send me vc please
send me link of ccnp latest dumps and v.c
Hi All,
I took the exam last week with max score.
Not EIGRP Simlet, not OSPF Hotspot.
The other 5 configuration labs are present in the exam and valid.
Don’t worry if you can’t do a ‘copy run start’ in the real exam (type it and good).
Ip addresses, names, areas and processes can change!
Don’t type blind!!! Know the concept and the commands!!!
And you are on the safe side.
Thanks digitaltut, Boyi n Peter (All question from these only).
hi all,
please can anyone read this comment and share ideas.
with the eigrp stub sim.
considering the second part of the question thus – R3 IP routing table only contains two 10.0.0.0 subnets.
during my lab practice i use this commands and had two subnets:
on r4
int s0/0
ip summary-address eigrp 123 10.2.0.0 255.255.240.0
end
copy run start
can this commands be used during real exam, thanks
@eddy ghana:
I used “ip summary-address eigrp 123 10.2.0.0 255.255.0.0″,
found two 10.2.x.x subnets,
and got 100%!
Does the TAB or ” ? ” work in the exam ?
thanks guys
send me latest dumps of ccnp please
why we are using ip summary-address eigrp 123 10.2.0.0 255.255.0.0
can we use ip summary-address eigrp 123 10.2.3.0 255.255.255.0,
if not why it was wrong?
have any 1 latest dumps??
@Dinesh if u use this commnd ip summary-address eigrp 123 10.2.3.0 255.255.255.0,
then it will not summarise the prefixes like 10.2.4.0/24, 10.2.5.0/24 … the bettoer way to use below command to summarise the prefixes.
ip summary-address eigrp 123 10.2.0.0 255.255.0.0
Guys please post ccnp latest dump link!
Guys please post ccnp latest dumps link!
Hi CCNP,
Could anyone who passed out recently send the lab Sims name please??
Any one got c2691 ios image link for GNS. Please send the link.
Appreciate for your kind help in advance.
Regards
@Ghost from Germany,
Can you please send ur dumps to these addy: consula04@yahoo.com.
tanx in adv.
Just took this test yesterday. I passed nearing the 900 mark but I was taken back by the amount of tunneling and ipv6 questions. I didn’t scored as high as i wished just because of those two topics. Every other topic, bgp, ospf, eigrp and redistribution/path control, I scored 100%
now to this eigrp stub sim test:
ip summary-address eigrp 123 10.2.2.0 255.255.240.0 makes good sense to use, but it DOES NOT WORK in the actual sim test. Which is odd as this is the most optimal summarization that works fine on real routers running 12.4T.
only ip summary-address eigrp 123 10.2.0.0 255.255.0.0 works
just as digtut has it here.
I hope cisco and pearson get their stuff together so that offer cisco IOU in their exams instead of these awful and whacky sims
it would be really helpful if ny1 cn upload packet tracer labs !!
Guys please help with this simple question..
Question wrong?
Three paths are choosen:
FD = A-D-E-H is 10+10+10=30 Therefor the sucessor is 30
Second condition variance=2 (2xFD=<AD) in this case it would be 2×30=60
FD = A-B-C-H is 40+15+15=70 ( does not meet second condition)
A-B-E-H is 40+10+10=60 ( meets second condition)
A-F-E-H is 20+10+10=40 ( meets second condition)
A-F-G-H is 20+20+20=60 ( meets not second condition)
why? A-B-E-H have 60 and meets and A-F-G-H have 60 and not meets??
tks..
I passed the route today with a score of 941. Just do these 5 labs and you are good to go and from exam collection Igor vce
Do remember that i faced an issue in this particular lab
ip summary-address eigrp 123 10.2.2.0 255.255.0.0 ( Didnt do any summarization and it gave me only 8 subnets)
ip summary-address eigrp 123 10.0.0.0 255.0.0.0(This gave me only 1 subnet)
Maybe this was a bug.
@striker.
I agree with you. It’s probably a bug. I tried both 10.2.2.0 255.255.0.0 and 10.2.2.0 255.255.240.0
For some reason it summarized incorrectly
I however entered ip summary-address eigrp 123 10.2.0.0 255.255.0.0 and it worked fine. Just like digitaltut says
@ Rayd send me your e-mail address, and I will pass you the IOSimage you are asking for
what is lan link to ping???
what is the basic purpose of R2 in this toplogy??it will be used or not ???
@jpmarinm can you please send the IOS image to kolly20102001@yahoo.com thanks
Passed today with 100% points on this sim. I summarized with ip summary-address eigrp 123 10.2.0.0 255.255.0.0 and on R3 got something like this, I had two 10.0.0.0 subnets but output was different, something like this:
10.0.0.0/16, is subnetted, 1 subnet
D 10.2.0.0 [90/xxxxxxx]
10.0.0.0/24 is subnetted, 1 subnet
C 10.2.3.0 is directly connected
@ srx ,plz reply me what is the purpose of R2 in this lab???
@meereb
R2 has no purpose, the only thing that you can use R2 is to check if R4 advertised prefix 172.16.1.0/24 to other neighbors. All configuration is done on R2 and R4.
@ srx
u mean to say we have to ping from R2 to R3??
@meerab
I didn’t try to ping from R2 to R3. I just checked IP routing table on R2 and saw 172.16.1.0/24 prefix.
@srx
thanks so much ,now having only just one confusion in ospf sim,i have pasted question in ospf page,kindly reply soon ,or if u have time than kindly chat me in gmail,my email id is :hailian685@gmail.com.i have paper on 21st