OSPF Neighbor Simulator

Know (aside from what’s allowed or disabled on your exam):
1. show ip protocols: It displays OSPF status, process-id and neighbors/gateways. It also shows area types configured (normal, stub, NSSA etc.). Lastly, it lists protocols that are being redistributed and networks that are being advertised.

Helpful in troubleshooting: Neighbor relationships, missing routes, and problems with summarization and filtering.

2. show ip route ospf: Displays OSPF routes that are being received from neighbors and their administrative distances. It also shows the cumulative cost metric to reach a particular subnet and what the route source and interface is.

Helpful in troubleshooting: General issues, missing routes, and problems with summarization and filtering.

3. show ip ospf interfaces: Displays OSPF interfaces. It also shows type(s) of network, neighbor count, type of authentication and timer values.

Helpful in troubleshooting: Neighbor relationships, local configuration issues, and routing problems.

4. show ip ospf neighbors: Displays active fully adjacent neighbors, router ID of neighbors, neighbor state/DR state, IP addresses/interfaces and dead time of neighbors.

Helpful in troubleshooting: Neighbor relationships and local configuration issues.

5. show ip ospf database: Displays LSA types per area, advertising router, Link ID (subnet) and age.

Helpful in troubleshooting: Missing routes, filtering problems and general issues.

6. show ip ospf border-routers: Displays router ID, advertising router, area, ABR or ASBR, and cost details.

Helpful in troubleshooting: Missing routes, filtering problems and general issues.

7. show ip ospf: Displays OSPF process ID, configured areas, number or types of areas, It also shows the number of times the SPF algorithm is executed. If you see a very high number of SPF calculations, it could be a flapping router or an interface with an issue.

Helpful in troubleshooting: Missing routes, filtering problems, and general issues.

Following debug commands can also help in troubleshooting many issues:

1. debug ip ospf adjacency: It is used to debug neighbor adjacencies.

Helpful in troubleshooting: Neighbor relationships, routing update issues and stub router problems.

2. debug ip ospf events: It is used to debug network events.

Helpful in troubleshooting: Routing update issues, convergence issues and interface flapping.

3. debug ip spf hello: It is used to debug neighbor adjacencies.

Helpful in troubleshooting: Neighbor relationships, configuration issues and DR/BDR election problems.

I Just Pass my ICND1 today with 973 Marks and this question was there,
Thank you 9tut for a big help and support …. you guys are awesome …..

need to pass icnd1 ? study cbt nuggets icnd1 and check everything on 9tut.net you dont need anything else …….

made my ICND1 today with 986/1000. Thanks 9tut.net

I past icnd1 past Sunday any and same or sim miler question were common:). Thank you

With score 973.

R5 is showing as empty but answer is PPP encapsulation authentication fails

Most of the ospf configs o these routers show whats going on ? 🙁

seems to be working now dont know what happened there

well i ran the sim again and sometimes it says the ospf db is emtpy, sometimes it says a router id is not configured, sometimes it says that the command sh ip ospf int is not supported. 🙁

I passed with 960 today

How to pass ICD1

1 – Learn the material, CBT Nuggets worked great for me. Watch the videos, take notes, and practice the router configurations using GNS3 (Network Simulator)
2 – Learn to subnet in your sleep. If you are not comfortable with subnetting, don’t go take the exam.
3 – Once you are fairly comfortable with the material, sign up for 9TUT and get the practice exams. Don’t be a cheap ass, it’s 9 bucks.
4 – Take the practice exams and when you get the answers wrong, learn what you did wrong, and I mean LEARN it.
5 – Take the practice exams over and over and over again until you are bored because you know all the right answers and WHY they are the right answers.
6 – You are ready to go pass the test

I took the test today, I got a 960. I got 100 in all sections except for security. Why is that? Cause I’m an idiot and hit NEXT on the sim to get to the second question on the SIM. Well, that skipped the last 3 questions on the SIM, so yeah, don’t do that. My test center had this crappy little monitor and I missed that there is a box on the upper left to select the next sim questions. So I was really careful the rest of the test.

There were a couple of questions on 9tut for me that were debatable as to what the right answers were.

Which two characteristics describe the access layer of the hierarchical network design model?
Port Security and VLANs is correct. 9tut has this correct now but people debate it.

Which two commands will display the current IP address and basic Layer 1 and 2 status of an interface?
Show Protocols and Show Controllers are the answers. 9TUT is wrong on this question. I think it’s just a poorly worded question. Both of the commands together will give you all of the requested info. Show Controllers will not give you an IP. As I said, I got all sections 100% except security, and other people getting 100% overall answered the same. That’s why I went with this answer.

I got no IPv6, I got Security SIM, Show Config SIM, and OSPF Neighbor SIM. On the OSPF neighbor sim I got everything in the SIMs here on 9tut plus one new bonus question. Similar to the following.

Why can’t Router 1 and 2 form an adjacency?

The pertinent config info was as follows.

Router 1
router ospf 1
log-adjacency-changes

interface FastEthernet0/0
ip address 10.10.10.1 255.255.255.252
ip ospf area 0

Router 2
router ospf 2
log-adjacency-changes

interface FastEthernet0/0
ip address 10.10.10.2 255.255.255.252

The answer being Router 2 needs the configuration IP OSPF AREA 0 added to interface Fa0/0

Other than that, I think I EVERY question I saw was here on 9tut. So if you are comfortable passing the 9tut exams and sims, YOU’RE GOOD. Stop asking for dumps, your staring right at them. I looked at other dumps/exam sims before I found 9tut that had more questions, specifically IPv6 and more different drag and drops. I was wondering if I’d see those on the exam, I didn’t. Just the stuff here.

Cheers!

Posted to wrong section, sorta relevant though.

What command do you guys run to determine that there is an issue with the ppp encapsulation? I do the show ip ospft int and if it returns empty, I assume that there is a ppp issue. I dislike to assume. Thanks

I passed my test today! (933 out of 1000)

***This simulation ate my lunch, so please learn the commands you need to know***

Echoing what Manuel above said, how does one verify that PPP Encapsulation is failing between two routers? Is it that running the command “show ip ospf interface” returns (empty) that shows that PPP Encapsulation is failing?

For the ppp encapsulation, the interfaces use chap, this requires authentication
so R3 will look for the Username to match its hostname & vice versa

if this matches what is in the running config then authentication is a success
so on both routers, check the username & Password in #Show running config
R3 should read username R5 password 0 someone
R5 should read username R3 password 0 someone

11/19/2014.. I failed my ICND1 exam today 762/1000. Didn’t do well on troubleshooting ospf 6 routers and a switch question,, got panic and worry time might run out at the end so I pretty much guess on the answers. Turned out I finished the 50 questions with 9 minute left. Planning to take it again next week, I understand how to come up with answers after using the Simulator here.
Anybody failed and re-take the test and see some of the same questions again ?? just curious.
Any advice how to tackle this Sim question with not burning up so much time. Thanks

show ip ospf
show ip ospf neighbor
show ip ospf interface

Don’t work on the second ospf sim?

I passed today 947. Learn the reasons why the answers are what they are. This is the only way you will pass. Also, there is no calculator and you can’t go back. Answer each question wisely.

God Help Us

what command do you need to know for the OSPF Sim? I was able to answer the questions only using the show ip ospf interface command. Do you need to know any of the other commands?

And how do you know PPP encapsulation authentication failed on R3 and R5?-What does this mean?

Thanks,
Ben

Hey Ben I was confused on that for a minute too. For the PPP encapsulation refer to JC’s comment from September 3rd. In the running-config the user name and password have to be set properly. It isn’t on the second router.

Your thought please re: relationship between R3 and R6 failing. Whilst they do share the same id (which in this example is the correct answer for the protocol being down, as they are both using CHAP isnt is also a posibility that they are not talking as there is a ppp authentication issue as the username and password are not configured on R6?

is it me or do most of the commands on the 2nd SIM do not work?

Planning on taking my ICND1 next month, and ICND2 the end of next month. just paid my $9..
will 9tut’s questions and sims help me, I passed CCNA in 2009!!

Took the Test today lots of the questions here where on the test 2 that got me where “what are the benefits of having a single OSPF area rather than having 2 OSPF areas” and a single question about RIP v1 router id assigning.

THANKS 9TUT

the comman show ip ospf interface doesn’t work on R5 but does on R3?

The Simulator Version 2 is unusable……..only command I can get to work on any router is show run !!!!!

@spides666: We tried the command “show ip opsf interface” on R5 and it did work. Please don’t type too short command.
About the Simulator v2 could you please tell us which command you could not use as we checked and saw they are working normally.

Simulator ver 2 is not working properly. The only 2 commands that are working are “show run” and “show ip protocols” other than that none are working. I tried full command syntax and also “show ip ospf interface” that you suggested earlier to spides666 but same result. Please fix this issue.

Hi OSPF Sim 2 is not working. It wont show me the questions. Thanks

@Phil: Could you please check again? We checked but found no problem. Maybe the Flash was not fully loaded.

@9tut: working fine now thanks.

@9tut: None of the commands are working for this simulation for me.

@9tut sorry for the previous command. Not all the commands on the “supported” list is working.

yes, I see the same issues noted above, for example the q. about R3 and R4 forming adjacencys, R3 is not working with most of the show ospf commands, except sh ip ospf database, and other similar scenerios – not to write a book here.

@Varun, @jeanclaude: Could you please list some commands that are not working? And which version you are mentioning? We will update the commands on these sims.

Hi 9tut, Thank you so much for all, I passed my ICND1 today, and missed just one question. You were a huge help! Now looking for ICND2, count with you again. Keep online, for our sake! 🙂

Cleared ICND1 today 17th May 2015.
Refered Todd Lammle book, CBT Nuggets and 9tut at last.
No ipv6 questions, 3 SIMS.
Don’t just go reading the questions posted here, you may pass but there is no value for the certification otherwise.
Learn the topics thoroughly and then check your level with 9tut. 98% questions are here but many questions are tweaked a bit.
Good luck for those who are preparing for it!
On to ICND2 now!

Everlearner,which SIMS did you have?

A lot of wrong answers in Simlet 2 with regards to OSPF. Please correct them.

@anasty: Could you please tell us which question is not correct?

Sorry 9tut. My bad!

Just completed test..1000. Got the OSPF Sim. For R3 and R6 neighbor question, on the test R3 has password for R6 and R6 has password for R3 (sh run), not ppp authentication. correct answer is R3 router id configured on R6.

Practice “sh ip ospf interface” command and look for Hello intervals and Area ID matiching, while Router IDs should not match (make sure you’re looking at the correct interface from R3 to the second router)

For R1/R2; R1 has non-default Hello Interval 25. Configure no ip opsf hello-interval deletes it and sets it back to default .

Also had Security SIM. Used CBT Nuggets, Packet Tracer and 9tut

Both simulator works great on practicing OSPF SIMS QUESTIONS.
check the following items in a list, you will never miss the right answer.

Step1. Draw the Network Diagram on the paper in front of you including interfaces numbers (e.g. s1/0, s0/0/0, e0/1, fa0/0)

Step2. On each Router type the command: (SHOW IP OSPF INTERFACE)

Step3. Check the link Status has to be (UP/UP)= go to step no.4
if Status (DOWN/DOWN) or (ADMINISTRATIVE DOWN)=interface is down
if Status (UP/DOWN)=protocol problem (mostly like authentication problem)
In this case, Type command (Show Interface [interface]) to check the status

Step4. Check the IP Address has to be in a same subnet and mask

Step5. Check the OSPF Area, Value right next to IP Address, has to be in a same OSPF Area #, if not then OSPF Area mismatched problem or Router are in two different areas.

Step6. Check the Router IDs, have to different for each Router otherwise, Routers Same ID Problems (e.g. R5 has R3 ID)

Step7. Check the Hello Intervals, value has to be same for two routers, otherwise, Routers have different Hello Intervals.

Thanks…GoodLuck

Excellent Job Guys.

I have created few ospf basic labs on packet tracer.

Fuadpalm has provided excellent OSPF troubleshooting step by step guide. Please follow it.

For command help please refer to first comment on page provided by Derp.

For PPP encapsulation explanation please refer to Rahuladhyatm’s comment above. ( Credit goes to JC as well )

Thanks to 9 tut for creating such a wonderful site.

I have seen guys commenting about RIPv1 question under different ip routing ospf forums.

Can someone please post this question here is possible?

Booked my exam on 21st July. I have to clear it in first go. Fingers crossed.

Thanks again

HI Hemal today i got the RIPv1 question … but its actually not related to RIPv2 at all. its only mentioned as inormation in the question but the question does not ask anything related to RIPv1 ..i think it asked about IP addresing/subnetting…

got exam in 1 hour any advice?

oh yes , PASSED, 9tut great, learn everything, sims make sure u understand them , as they mix up

the list of commands which I used were fairly simple
-show run
to verify for area,timer,encapsulation etc.
-show ip protocols
for router id

I am correcting myself
Just use sh ip ospf interface
—all info is there

thats a shorter way

9tut is the ospf sim people get on ICND1 same for ICND2

Don’t normally review stuff but passed the ICND1 this morning mainly thanks to 9tut and CBTnuggets whoop

Hello all, I pass my ccent yesterday with 987 out of 1000 points. This Security testlet, the config sim, and the ospf sim where all on the test from here. The answers are all different but same SIMs. So, be able to subnet very quickly! Memorize the show commands here and understand these sims. You will pass the test. This is a great site!!!

The option to look at the routers config on the ospf sim, is not available, just the topology, can this be fixed ?

Hi eveyone, Gave my ICND 1 exam today (Nov-28-15) and passed 965/1000. This sim was on my test along with security sim and Configuration Sim… These question and answer are still valid. Just go through the Quizzes and OSPF, Security & Configuration Simulation. One slight change on Configuration simulation instead of /28 it was /29.. rest 99% of questions were on 9tut… good luck everyone.

Hi Guys passed my ICND 1 exam I had the security sim and configuration sim. 9tut is great they had all the concepts not really exact labs but if you study them and learn/understand them you will be fine. Most of 9tut questions are on the test Moving on to ICND 2!!!

960/1000

Show config, Security, OSPF, drag and drop

98% Q’s here….saw 2 odd ones but if you understand the answer to Q’s here you should be able to apply your knowledge and get by.

How real are these questions because the composite quizes see too easy

I saw that one of the questions was “what are the benefits of using only one area with OSPF? Name two” apparently this is a new question on the exam. I think easier configuration is one answer, does anyone know the other?

Hi all, i’m so confused by the simulators. Can someone dumb it down in terms of how these work/worked on your exam?

I cannot view the composite quizzes. Can some assist me?

I saw that one of the questions was “what are the benefits of using only one area with OSPF? Name two” apparently this is a new question on the exam. I think easier configuration is one answer, does anyone know the other?

I would say that easier management (if only a few routers) would be another answer.

@gez te answer will be
simpler configuration and not need a virtual link
reduce LSA types to be generated

my ICND1 will be MARCH TUESDAY 8…..I have made all the quizes, composites quizes here and simulators…besides BOSON labs, and read all the ICND1 book, I know IPV6 ACLs EIGRP , RIP and other questions will not be included in the ICND1 101-100
anything else suggestions please?

Hey guys just passed the exam 983/1000 just one question wrong on LAN switching, all the questions similar here, be carefully with subletting there are tricky questions but piece of cake, 2 sims, no ospf sim in my exam, the others will came…ready for the icnd 2 thanks 7tut

OSPF Neighbor Simulator: I am trying to do this SIM, but
“Please click on the “R1-4” and “R5-6” buttons on the right-side to access the command line interface (CLI) of the routers.
There are NO BUTTONS on Side or any access to Routers (CLI) So I cannot do the SHOW Commands necessary to troubleshoot. I can get to the Multiple Choice Questions only?
Is there a problem with SIM? I was able to do Security SIM and had access to Router and Switch to do Commands. Can someone please kindly respond? I am Logged in as a Premium USER and Paid and logged in with my name. THANK YOU !

@jenn: Please try zooming out to see the buttons on the right-hand side. If your problem still exists, please send a screenshot of your problem to support@9tut.net so that we can identify your problem.

Could some please advise on this Lab, there is a question regarding router3 and router 5 not forming neighbors, the answer I chose was a missing network command in router5 however it says this is wrong, the answer is Hello interval is a mismatch?, when I do the sh ip ospf int they both so as ten, when you ask to review it say router5 has interval of 50 it does not

Answer please ?

Guys in OSPF exam mode Sim dosen’t support show run config???Because all you want (at least almost) is there.

TO OSPF (July 18) On router 3 if you scroll down a bit to to see int s1/1 it show hello 50, dead 200.
On router 5 s1/0 show hello 10, dead 40.
So there is a hello mismatch. I think you have looked at wrong interfaces.

Last question on R3 and R4 neightboring, there’s exist an Area mismatch AND the Hello/Dead time mismatch, one of the criteria should be ruled out in the answer selections.

So the OPSF sim will be in ICND1 or in ICD2?

Did anyone get this in ICND2 new version?

Is this SIM in the current version exam?

anyone please reply

yes this was on ICND 2 v3

yes it is

Can someone help? Q. R3 to R5 not forming OSPF. I logged into R5 and see internet address x.x.x. .6 (R6) should this not be R3? .3?

were is the explanation, on ospf sim

were is the explanation, on ospf simulator

R3 is messing up. DOCTYPE html PUBLIC bs. won’t run any show commands.
Another shortcoming of 9tut.

Turns out I cant get any to work.

I am a premium member, I can’t seem to find the questions for any of the lab sims for ICND2. Please help asap

@Dobo: Please make sure you have installed latest Flash plugin at https://get.adobe.com/flashplayer and enable it on your web browser.
If your problem still exists, please take a screenshot and send to support@9tut.net so that we can help you.

The main commands you need for this sim is >sh run & >sh ip int br. Literally look at the interfaces instead of trying to memorize the answers and it will tell you the answers when you do these commands. Hopes this helps!

Passed yesterday got 870 out 1000
54 Questions in total. If you are going to take the exam soon:
– EIGRP sim,OSPF sim same here on 9tut, word for word
– 10 questions Drag and Drop all in ICND2v3 – New Questions Part 6 & 7
– ALL the NEW questions here, THEY ARE ALL VALID
– ICND2v3 – New Questions Part 4 to 7 you’ll be fine
MANY THANKS TO 9TUT well done

I will do the ICND2 exam in next few days but I am getting more familiar with OSPF, EIGRP, GRE troubleshooting techniques. Thanks 9tut.

I will let you know my score in ICND2 200-105.

The OSPF sim Question 4 ‘An OSPF neighbor adjacency is not formed between Router R3 and R6’ has a critical command line missing from the config, as shown in the answer, but nt shwn in the sim using the comand ‘show running-config’…

username R3 password CISCO36 – is missing from R6 config!!