OSPF Sim
Question
OSPF is configured on routers Amani and Lynaic. Amani’s S0/0 interface and Lynaic’s S0/1 interface are in Area 0. Lynaic’s Loopback0 interface is in Area 2.

Your task is to configure the following:
Portland’s S0/0 interface in Area 1
Amani’s S0/1 interface in Area 1
Use the appropriate mask such that ONLY Portland’s S0/0 and Amnani’s S0/1 could be in Area 1.
Area 1 should not receive any external or inter-area routes (except the default route).
Answer and Explanation:
First, we configure Portland’s S0/0 interface so that it belongs to Area 1. So, we have to find out which sub-network the IP address 192.168.4.5/30 (the IP of interface S0/0 of Portland) belongs to. This address belongs to a subnetwork which has:
Increment: 4 (/30 = 255.255.255.252 or 1111 1111.1111 1111.1111 1111.1111 1100)
Network address: 192.168.4.4 (because 4 = 4 * 1 and 4 < 5)
Broadcast address: 192.168.4.7 (because 7 = 4 + 4 – 1) (It is not necessary to find out the broadcast address but we should know it)
The question requires that only Portland’s S0/0 and Amani’s S0/1 could be in Area 1, therefore we must use a wildcard of 0.0.0.3 (this wildcard is equivalent with a subnet mask of /30) so that there are only 2 IP addresses can participate in area 1 (they are 192.168.4.5 & 192.168.4.6). The full command we use here is network 192.168.4.4 0.0.0.3 area 1
The question also requires that “Area 1 should not receive any external or inter-area routes (except the default route)”. Recall that if we don’t want the router to receive external routes, we have to stop LSA Type 5. And if we don’t want to receive inter-area routes, we have to stop LSA Type 3 and Type 4. Therefore we have to configure area 1 as a totally stubby area. For your information, here is the definition of a totally stubby area:
“Totally stubb area – This area does not accept summary LSAs from other areas (types 3 or 4) or external summary LSAs (Type 5). Types 3,4 and 5 LSAs are replaced by the Area Border Router(ABR) with a default router. Totally stubby areas protect internal routers by minimizing the routing table and summarizing everything outside the area with a default route.” (CCNP BSCI Official Exam Certification Guide, Fourth Edition)
In conclusion, we have to configure area 1 as a totally stubby area. We do that by configuring Portland as stub and configuring Amani (ABR router) as a stub + “no-summary”suffix.
+ Configure Portland router as a stub:
Portland#configure terminal
Portland(config)#router ospf 1
Allow network 192.168.4.4/30 to join Area 1, notice that you have to convert subnet mask into wildcard mask:
Portland(config-router)#network 192.168.4.4 0.0.0.3 area 1
Configure Portland as a stub:
Portland(config-router)#area 1 stub
Portland(config-router)#end
Portland#copy running-config startup-config
+ Configure Amani router as a “totally stub”:
Amani#configure terminal
Amani(config)#router ospf 1
Amani(config-router)#network 192.168.4.4 0.0.0.3 area 1
Make area 1 become a totally stubby area, notice that we can only use this command on ABR router:
Amani(config-router)#area 1 stub no-summary
Amani(config-router)#end
Amani#copy running-config startup-config
Note: Make sure to check the OSPF process ID before typing your configuration. Maybe it is not OSPF process 1 like the configuration above.
Other lab-sims on this site:
EIGRP Simlet
Policy Based Routing Sim

Passed today 930. All sims are valid
OSPF sim is and old simulator so you can’t use tab, but you can use ?
Had different IP addresses -192.168.39.4/30
You need to setup OSPF PROCCESS ID as 62 – lab scenario
Hi guys check my page for latest switch dumps and for sure…
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if anyone can send me complete labs with solution, i will be thankful to you all,
help me in labs and i help you guys…
contact me at mailbomb1234 at gmail dot com
Thank you …
I’ve got to tell anyone going after their CCNP Routing exam to pay close attention to any/all comments and suggestions from the guys who are maintaining this “great” website. Due to this website I went from failing the exam with a 750 to passing with a 978.
By the way if anyone would like the GNS3 labs, I’ve put them all together and would be happy to share with you. Send an email to me at jsomebody3334@yahoo.com
I’d like to offer someone my Pass4Sure 642-902 Cisco Routing license which is good until February 27th. The price is just $40. If interested let me know at ltynes@yahoo.com
Whats the significance of secret password :cisco…. ?
Passed today 960. All sims are valid.
Basically, labs were the same – in EIGRP/OSPF redistribution there is a FastEthernet Link so don’t forget about distance eigrp 90 105 command.
During training I used Peter’s dump.
Cisco.CertifyYou.642-902.v2012-09-20.by.Peter.635q
very very eassy.
Good luck for everyone!!!
cleared my exam yesterday, exam was easy.
Got 976/1000. Only problem i faced, that i was not able to ping the ospf loop back interface, That’s very strange, cuz i completed all the configuration required in the SIM
@LT – your email didn’t work for me, I sent you an email for GNS3 labs for route to jsomebody3334@yahoo.com – is that correct?
I want to take route exam, next month, can someone please send me the GNS3 lab files for sims on route.
Thanks.
jjvan12@mail.com
Passed on 11th Jan 2013 956/1000 !!!!!!!!!!
All labs are valid!!!! Dumps from Peter, Thanks to this community!!!
@all
Lynaic(config-if)#ip address 239.239.239.239 255.255.255.255
Not a valid host address – 239.239.239.239
—-
any advice
@bharath. it is used to gain access to the privileged mode of the routers to configure the tasks discussed above…
i have found the some knowledge. This could might be useful.
Standard Cisco Router Configuration
http://cisconetworkingcenter.blogspot.com/2012/12/standard-cisco-router-configuration.html
Standard Cisco Switch Configuration
http://cisconetworkingcenter.blogspot.com/2012/12/standard-cisco-switch-configuration.html
can i use the following
on Portland
network 192.168.4.5 0.0.0.0 ar 1
and on Amani
network 192.168.4.6 0.0.0.0 ar 1
i believe this is easier and more specific
and why some people are asking about Lynaic loopback interface?
@ Kevin
You are using a multicast address :D
Simplest and best solution is
Portland:
conf t
router ospf 1
area 1 stub
!
int ser0/0
ip ospf 1 area 1
Amani:
conf t
router ospf 1
area 1 stub
!
int ser0/1
ip ospf 1 area 1
The network statement can also be 192.168.4.5 0.0.0.0 because it is OSPF and not BGP in terms of actually advertising interfaces in ospf and networks in BGP
Alien the 2nd please go back to your CCIE course, we are doing NP Here
but thanks for the advice :)
Why am I got error when issueing the command ip ospf 1 area 1 on interface?
ALL, please make a note for this Sim. The question will ask you that the Ospf Process should be a specific process number on all the routers… If you keep doing “Router ospf 1″ on all routers, then the Sim will not be considered completed. So if they ask you to make the Process “53″ on all then do “router ospf 53″ on all routers. Keep the AREAs the same though.
@Kevin, Yes that is a Multicast address, but it is falls inside “Limited Scope Addresses” of Multicast range. Limited scope address range is 239.0.0.0 to 239.255.255.255.
They are only supposed to be used inside an AS and not routed over the Internet just like private 1918 addresses. However these addresses are given to Multicast sources within an AS.. But i know it is confusing if you start thinking about it, because that is what Cisco wants you to do, To be confused. Cisco sucks..
@ Anonymous
ip ospf area 1 will not give an error, it will work just fine
but
i don’t recommend to use in, this might be outside this scope
@ Chumpu
thanks for the advice :)
i have just passed my exam with a 976.thanks alot to you guyz,digital tut,and exam collection.all questions were in the dumps.the secret to passing is simple.just redo the dumps as many as times as possible before you register for the exam.cisco aint got no new questions.The labs are five,exactly as in digital tut except for the ip addresses are the only different thing.the copy run start worked in only one lab but not for the others.make sure you check the running config on all routers before anything else.Watchout for the area configuration ospf lab.i did everything correctly bt i got an 87%.anyway the exams are the dumps,redo the labs as many times as possible before the exam.all the best.
@joseph
can you help me sending me the dumps in order to study
please
my email martsiro@gmail.com
Passed today and the above Sim is slightly different, you need to advertise the most specific subnet mask between Portland and Amani which is the IP address of the serial interfaces (or whatever connects the 2 devices together) the eirgp stub and eigrp stub no-summary are still exactly like above.. Also the names of the routers are different..
These tpoics are so confusing but this helped me get the job done.
After My CCNA I am now got time to Start Studies again I hope it going be nice studies work place
you guys may download OSPF GNS3 LABs by Jermy which I created after his lecture on OSPF
you guys may download OSPF GNS3 LABs by Jermy which I created after his lecture on OSPF
http://www.elme.pk/moodle/mod/folder/view.php?id=25
how can we check that our lab is perfectly done????
why we use ospf 1 in this sim????
how can we knw that area 1 is not receiving any external or inter areas routes???
how will you validate if the area 1 is not receiving any external or internal routes? because when I issue command sh ip route of Portland I still get these;
O*IA 0.0.0.0/0 [110/65] via 192.168.4.6, 00:08:18, Serial0/0
Just cleared the exam with 1000 marks. The IP addresses were different for this lab and I used the 0.0.0.0 wild card mask because they were asking for specific IP.
THANKS A LOT!!!!
hi,
1st of all … read this statement and it’s requirement,
Use the appropriate mask
so you will be able to use the mask when you run OSPF in ROUTER MODE not on interface mode.
2nd…. AREA 0 is backbone area so if you will not configure area 1 as totally stub, may you will be able to find loop back 0 of LYNAIC in router portland because of it’s null 0. One another thing is here …. if you will configure area 1 as a…. TOTALLY STUB…. then you will see a default route and connected route in the PORTLAND router…. so read this statment too.
Area 1 should not receive any external or inter-area routes (except the default route).
here he use … ( except the default route)… because it is must when we configure an area .. stub… or… totally stub.
hope you will understand.
if i have done any mistake here … please guide me..
thanks.
passed today and got 988 from 1000. all sims are valid friends. Only a little difference is on this lab : Ospf process id(between Portland and Amani) is 52 and area id 25. Everything else is the same.
pass yesterday with 850
this lab is in exam need configured by telnet asking differently but solution still same at my last command of Network #network 192.168.4.4 0.0.0.3 area 32 i see many log messages seems there was problem in telnet it self i even ed or exit was not working left this Lab as it is one another issue in EIGRP summarization GNS result was ok but in real exam i try 3 4 time but still 1 subnet i left as it is any ways thanks to digitaltut
Good luck to u all
Where to download ios images for gns3?
All ip change this simulation. but Topology not change!!!!!
Can I use the tab function on the exam ?
got 1000/1000 … labs 100 % valid .. Dumps from Boyi 411 on examcollection 100 percent valid…
Passed my ROUTE today, I was given OSPF process 78 for my test on this sim.
passed today with 988
for me was process 20 and little change in ip addressing…
How to check OSPF process iD?
Show Running config will display right…
Pls help….
how to check OSPF process ID?
show ip ospf database
Hey guys, Please help me in this sim. What if the ip address is changed to 192.168.17.5 /30 on Portland?
Can any1 please tell me what will be the network address of 192.168.17.5 /30 with proper explanation??
plz send me the download link for ccnp 642-902
Hi,
In order to enable on OSPF, should we not use the wildcard of all 0′s ? As this is more specific…..It states to use an appropriately. Using 0.0.0.0 gives us the full control as we are matching the exact same ip address and not just a subnet. Thanks
Show ip ospf
that can also show ospf process id
download all labs from here….
http://search.4shared.com/postDownload/MNxMccev/GNS3_642-902_Test_Sims.html
i need to know how to check the lab after completion…??
First Thanks to Almighty GOD.
Passed today with 941/1000.
Only change was in This Sim, I had to configure the process ID 53. IP address were same, Names and areas were different.
Got all 5 LABS. 3 Drag and Drop.
Thanks to Digital tut. You Rock Man!!!
@ MAK: in the exam, it was written that loopback of last router cannot be pinged from first router and vice-versa. So i checked it by pinging the loopback of last router from first router and vice-versa.
@ vinit: thanx vinit..i also passed the exam yesterday..:)
can anybody share that which labs are asked in exam and how many……
@Sandy,
All 5 labs appeared on the exam, same questions as asked here, but do pay attention to the questions asked on the lab, but the concept is the same as here, except for process ID and/or IP might change. Just passed today with 900 marks by the way.
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.
still vlaid
still vlaid. area will be 11 and ospf process was 42
router ospf 42
Passed today 965/1000.I am from Myanmar.
Thanks to Peter & digitaltut. The dump is valid and Lab from digitaltut.
OSPF sim from change area ID and process ID.In Redistribution one on router R3 i did sh int fa0/0 and found bandwidth 100000 and delay 100
So i did redistribution ospf 1 metric 100000 10 255 1 1500 .not worry if can’t type copy running-config startup-config .It can ok!
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
Hello,
How many total questions is the test? 5 sims, 3-5 drag and drops, and mulitple choice questions as well? Thanks
hi folK, i wll be writing my exam very soon. please i want to know if the lab sim in the exam is shown as it is shown in the digtut preperations(which include the ip add, diagram etc.) please, i need urgent answers. my exam is few hours away. thanks folks.
Hello,
all the LAB are valid I did test yesterday.
Thank you
I passed my exam yesterday with 965 score.
I totally agree with 929′s comment.
Sims are valid still, I had 53 questions with 5 sims and 4 D&D
Thanks 965!!! Much Appreciated.
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).
Please anyone tell me if ip address 192.168.37.5 of portland so what will be the wild mask
please give me the answer because day i booked my exam please fast.
if ip address will be change for e x: 192.168.4.38 like so what will be the wild mask.
Dear Discovery wild card mask same like 0.0.0.3
because ip had 192.168.39.4/30
ok now first we will check subnet mask above is 30.
simply minus(-) 32-30=2 ok then by the rule of wild mask 2 power 2 means 2*2=4-1=3
192.168.39.4 subnet mask is here 255.255.255.0
ok then inverse 255.255.255.0 / 0.0.0.3
problem solved
@ Waseem > Nice details, and subnet mask as you given above:
“192.168.39.4/30, 192.168.39.4 subnet mask is here 255.255.255.0″
but as my little knowledge is subnet mask should be 255.255.255.252 and in slash notation it is 192.168.39.4/30 (for 255.255.255.0 it’s /24 not /30) yes for wild card some other way is to -1 from block size, since subnet mask is 255.255.255.252, subtract > 252 from 256 you will get 4 and for wildcard subtract -1, finally it’s equal to 3. Wildcard is broadcast address.
Thanx.
i passed the Route exam yesterday with 976/1000.
All labs are still valid.
Thanks so much.
Let’s go to the Tshoot.
I had all five simulations. Thanks elephantly for the help you are giving
HI GUYS IT’S URGENT.
WHAT WOULD BE THE NETWORK ADDRESS IF THE IP ADDRESS CHANGES TO 192.168.39.4/30?
COULD YOU PLS EXPLAIN?
@Anonymous if you don’t know that, you don’t deserve to pass. IP addressing is a CCNA level topic
Hey man I know I just forgotton it.
@Anonymous >
This may be helpful :)
IP Address : 192.168.39.4
Address Class : Classless /30
Network Address : 192.168.39.4
Subnet Address : 192.168.39.4
Subnet Mask : 255.255.255.252
Subnet bit mask : nnnnnnnn.nnnnnnnn.nnnnnnnn.nnnnnnhh
Subnet Bits : 30
Host Bits : 2
Possible Number of Subnets : 1
Hosts per Subnet : 2
Subnet
192.168.39.4
Mask
255.255.255.252
Subnet Size
2
Host Range
192.168.39.5 to 192.168.39.6
Broadcast
192.168.39.7 (In this case Wild Card)
@Route-902 don’t encourage this type of behavior. The internet is littered with info he could google on his own. That guy is your typical cert collector who’s plan A is to memorized this stuff in order to pass. It devalues the cert’s worth in the market when these ppl who have ccna certs can’t answer simple ip addressing questions about masks and wildcards to interviewers.
Most of us are here because this is our plan B. We’re here to discuss how to solve these labs, not to train people who don’t even have the necessary skills to solve these labs.
@ Anonymous > Well Said. I agree with you.
but hope that he will realize learning is not hard, yes it is attitude that make big difference. Anyway keep the discussion open, sure we discourage the “DUMPING” behavior, And my experience is that understand is long lasting than memorizing… :)
Cleared this Exam today… got all five labs.. only IPs and hostnames changed…
Hello. Can anybody pls tell me where can I get some Cisco IOS I could use for the exams. please.
i also need the IOS for virtual ghost, switch and PIX firewall.
hi
Is it correct to use a wildcard mask 0.0.0.0, it’s a more specific ?
Passed 988 ; Valid many thanks
Labs from Digital tut
http://www.digitaltut.com/
Download Labs from :
http://www.4shared.com/rar/SpTqscVr/gns3_642-902_test_sims_2.html
in the lap ospf is not configured on router
Whats the best way to verify this lab is done correctly?
if i use like
netwok 192.168.4.5 255.255.255.252 area 1
its right or wrong? please tel me hurry
@decent
its totally wrong… you need to use wildcard mask.. which should be you can say opposite of subnet mask
255-255 =0
255-252 = 3
so it should be 0.0.0.3
At the end of the solution there is a note mentioned about OSPF Process ID that we must check it before configuration. I don’t get it could anyone who recently cleared the exam can explain this? I mean OSPF process ID doesn’t matter you can pick any random number from the specified range just like in the above solution. I’ll be grateful if anyone can explain this as I’ll be appearing in the exam on 6th of MAY.
Hi, We just need to add some config in current running configuration, so we have to follow the existing OSPF process ID.
That is the reason for checking existing OSPF information.
Ohkk, Many thanks @Anonymous
how can i know the correct ospf process id?? from router 3 i.e lynaic router????
what is the purpose of router 3 i.e lynaic router???
Lab is valid, just passed Route today. All labs are valid.
@Xonair
The instructions I got in the exam were to configure portland and amani with a specific OSPF process # that they give you. Mine was process 98. It said nothing about changing the ospf process # according to whatever process # is already configured in lynaic.
The best thing is to pay attention to the lab’s instructions. As they could come with variations.
Can anyone provide the GNS3 configs for these labs? I’m a bit of a Newbie?
what is the purpose of R3 in this lab?
and whats the meaning of that lines:
the routing protocol for all each interface must b enabled under the routing process??
and ospf area is given 24 than how can we apply on all routers??