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OSPF Sim

June 23rd, 2011 in LabSim Go to comments

Question

9tut.net company has decided to network three locations to improve efficiency in inventory control. The routers have been named to reflect the location: Boston, Frankfurt, Lancaster.

OSPFSim

The necessary networking has been completed at each location, and the routers have been configured with single area OSPF as the routing protocol. The Boston router was recently installed but connectivity is not complete because of incomplete routing tables. Identify and correct any problem you see in the configuration.

Note: The OSPF process must be configured to allow interfaces in specific subnets to participate in the routing process.

You can download this lab and open with Packet Tracer here: http://www.9tut.net/download/OSPF_Sim_with_Solution.zip. Please say thanks to Renan who shared the files with us!

Answer and Explanation:

The question mentioned Boston router was not configured correctly or incomplete so we should check this router first. Click on PC-B to access the command line interface (CLI) of Boston router.

 

Boston>enable (type cisco as its password here)

Boston#show running-config

 

OSPF_sim_show_run

First, remember that the current OSPF Process ID is 2 because we will need it for later configuration. Next notice that in the second “network” command the network and wildcard mask are 192.168.155.0 and 0.0.0.3 which is equivalent to 192.168.155.0 255.255.255.252 in term of subnet mask. Therefore this subnetwork’s range is from 192.168.155.0 to 192.168.155.3 but the ip address of s0/0 interface of Boston router is 192.168.155.5 which don’t belong to this range -> this is the reason why OSPF did not recognize s0 interface of Boston router as a part of area 0. So we need to find a subnetwork that s0 interface belongs to.

IP address of S0 interface: 192.168.155.5/30

Subnet mask: /30 = 1111 1111.1111 1111.1111 1111.1111 1100

Increment: 4

Network address (which IP address of s0 interface belongs to): 192.168.155.4 (because 4 * 1 = 4 < 5)

Therefore we must use this network instead of 192.168.155.0 network

Boston#configure terminal

Boston(config)#router ospf 2

Boston(config-router)#no network 192.168.155.0 0.0.0.3 area 0

Boston(config-router)#network 192.168.155.4 0.0.0.3 area 0

Boston(config-router)#end

Boston#copy running-config startup-config

Finally, you should issue a ping command from Boston router to Lancaster router to make sure it works well.

Boston#ping 192.168.43.1

Other lab-sims in ICND2 Exam:

ICND 2 – Nat Sim Question

VTP SIM (on 9tut.com)

EIGRP Lab sim (on 9tut.com)

 

Other lab-sims might appear in the real ICND 2 exam, read and understand them if you have enough time.

Comments
Comment pages
1 2 3 54
  1. Anonymous
    April 7th, 2013

    Can anyone send me PKT Lab sim?

    tj_stanton00@hotmail.com

  2. Rico
    April 9th, 2013

    I can send you the OSPF one… Does it helps?

  3. Bav
    April 11th, 2013

    Just found this site today! Very useful thanks. =

  4. @ Rico
    April 21st, 2013

    Could you send me the ospf sim pls.
    sneeky2002@hotmail.com

    Many thanks

  5. BONZ
    April 23rd, 2013

    the ping to the lancaster router should fail because the S0/0 interface is is in the wrong subnet 192.168.155.9 Does anyone have a OSPF Sim that is correct? pls send it hansen305@gmail.com

  6. MARIONIYO
    April 23rd, 2013

    BONZ, THE LAB IS CORRECT,

    Interface Boston S0 and Frankfurt S1 are on the subnet that goes from 192.168.155.4 to 192.168.155.7, they have the correct ip addresses that belong to hosts on that subnet

    and

    Interface Frankfurt S0 and Lancaster S0 are on the subnet that goes from 192.168.155.8 to 192.168.155.11 , they have the correct ip addresses that belong to hosts on that subnet too

    in the answer, the network changes to 192.168.155.4 0.0.0.3 because that’s the network that contains the addresses of Boston S0 and Frankfurt S1 and that makes the connection to be correct!

  7. Ruths
    April 25th, 2013

    Please can anyone tell me if they have any questions on IPV6?

  8. bonz
    April 28th, 2013

    Thx@ Marioniyo i see it now

  9. bonz
    April 28th, 2013

    Thx@ Marioniyo i see it now

  10. icnd2
    April 30th, 2013

    tried emulating this lab on packet tracer if you use the 192.168.155.5 0.0.0.0 area 0 statement it converges with the rest of the area but maybe im wrong not really up to speed with ospf :))

  11. Anonymous
    May 5th, 2013

    yes YOU ARE right. I did this morning

  12. Pat
    May 5th, 2013

    Can you please send packet tracer sim to pat.elkins18@gmail.com? Thanks in advance.

  13. Anonymous
    May 10th, 2013

    guys, someone please send me the .pkt file for this ospf configuration on soniajennifer.aditya@gmail.com

  14. Enan
    May 12th, 2013

    also, pls. anyone send me PKT Lab sim

    laplandor@gmail.com

  15. rye
    May 19th, 2013

    anyone can you please send pkt lab sim.
    srm_ece@yahoo.com

  16. TK
    May 26th, 2013

    Can anyone please upload the OSPF sim here or send it o thamkhanye@gmail.com
    Thanks.

  17. Andrew
    May 28th, 2013

    The answer for the wild mask 0.0.0.3 for the second correct answer is wrong the wild card mask should be 0.0.0.7 since we are using the block size of 4 and it increments to 8 the block size is always one less than the actual block size and s0 ip address of .5 falls in between. Please some one correct me if I’m wrong I would appreciate it

  18. kaos
    June 1st, 2013

    @Andrew. The mask is one less than the block size, you’re correct there. The block size for that area is still only 4 though, from 4 to 7. That’s why the mask is 0.0.0.3. The network is 255.255.255.252, so the mask difference is 0.0.0.3.

  19. S
    June 20th, 2013

    Did not have this SIM yesterday.

  20. itwebbd
    June 25th, 2013

    Can anyone send me the PKT lab sim
    dwebb@isccorp.net
    Thanks!

  21. Janny
    June 27th, 2013

    VLAN 2 has 114 hosts so we need to leave 7 bits 0 for the host addresses (27 – 2 = 126 > 114). Notice that we are woinrkg with class B (both Host A and Host B belong to class B) and the default subnet mask of class B is /16 so we need to use 16 – 7 = 9 bits 1 for the sub-network mask, that means the subnet mask should be 255.255.255.128 -> B is correct.By using above scheme, C is correct because the IP 172.16.1.25 belongs to the sub-network of VLAN 1 (172.16.1.0/25) and can be assigned to hosts in VLAN 1.For communication between VLAN 1 and VLAN 2, the LAN interface of the router should be divided into multiple sub-interfaces with multiple IP addresses -> F is correct.

  22. NeedHelp2680
    July 11th, 2013

    Can someone please email this PKT lab sim to me?? viper911ad@yahoo.com THANK YOU!

  23. ospf Lab for PACKET TRACER
    July 12th, 2013

    Can anyone please send me ospf Lab?

    crawfordr@outlook.com

  24. Ricky Bobby
    July 18th, 2013

    I’ve just practiced making this as a Packet Tracer Sim. Uploaded it here for anyone who would like to use it: http://www.filefactory.com/file/57dzfh06d041/n/OSPF.pkt

  25. Ricky Bobby
    July 18th, 2013

    I neglected to mention that all passwords on the Sim I uploaded are cisco.

  26. Rico
    July 20th, 2013

    Hi guys I’m building one here… I can send you if you want.:P

  27. NeedHelp2680
    July 23rd, 2013

    Rico….Can you please send it to me?? My email address is viper911ad@yahoo.com THANK YOU

  28. NeedHelp2680
    July 23rd, 2013

    Ricky Bobby – I can’t download from that link. I even tried signing up for an account. Can you please email it to me at viper911ad@yahoo.com OR ANYONE ESLE FOR THAT MATTER. THANK YOU

  29. jordans cheap
    July 24th, 2013

    Spot on with this write-up, I truly feel this internet site wants a lot more consideration. I’ll almost certainly be again to read much more, thanks for that information. jordans cheap http://jordanscheapmmi.kouaa-blog.com/

  30. rayray
    August 6th, 2013

    CAN ANYONE SEND ME THE LATEST DUMPS FOR ICND2 640-816 IM TAKING IT NEXT WEEK AND COULD USE SOME GOOD STUDY MATERIAL AND LATEST EXAMS, THANKS, RAYRAY

  31. rayray
    August 6th, 2013

    sorry u might need my email, rayaragon@gmail.com thanks again

  32. Anon
    August 7th, 2013

    Don’t be silly guys: examcollection.com

    Updated dumps are posted there, all the time.

  33. Jeff
    August 10th, 2013

    Can one send me the PKT practice for this? test is in a week!

    jtbowers2013@yahoo.com

  34. I Past today 23 may
    August 11th, 2013

    why they use the adress 192.168.155.4 ??? if the increment is 4 !!! i mean 192.168.155.4 is a network adress!!! why they dont use 192.168.155.3 that is one ip adress??? please somebody answer my question !! thanks!

  35. ram
    August 11th, 2013

    why they use the adress 192.168.155.4 ??? if the increment is 4 !!! i mean 192.168.155.4 is a network adress!!! why they dont use 192.168.155.3 that is one ip adress??? please somebody answer my question !! thanks!

  36. Slothar
    August 12th, 2013

    @ ram – The only thing they use the 192.168.155.4 address is in the network statement. All that does is identify what interfaces are to be included in the OSPF process. 192.168.155.4 is the network address of the subnet that S0 is part of. The original network statement included addresses in the range of .155.0 through .155.3 which does not correctly identify S0 since it is in the .155.4 through .155.7 range (subnet).

  37. Brian Vess
    August 13th, 2013

    Can someone send me the packet tracer lab for this?

    Thanks
    general@websoftpc.com

  38. fabian
    August 14th, 2013

    we can also write the OSPF network statement like this:

    network 192.168.155.5 0.0.0.0 area 0 (This will tells the router to look for an exact match, an all 0s wild card tells the router to make an exactly match on the IP configured on the fast port- this may be easier than having to worry about 0.0.0.3 match)

    Also since both interfaces are in the same area, area 0 we can write the OSPF network like this:

    network 0.0.0.0 255.255.255.255 area 0 <–this says to match all interfaces in the router and add them to area 0. This is a much easier way in my opinion because it basically says router add all of my interfaces to area 0 in 1 statement…instead of having to write 2 lines..but this only works if the interfaces are in the same area..they must be in same area in order to work.

  39. Slothar
    August 21st, 2013

    @ Fabian. Not sure if I would get in the habit of including all interfaces. You lose a lot of the fine tuning abilities of OSPF and I’m not sure how this would go over on the exam. Cisco is rather particular when it comes to how they want things done.

  40. Anonymous
    August 24th, 2013

    I got this sim on my exam today. makre sure you study this hard.. looks like almost everyone is getting this.

  41. John
    August 25th, 2013

    Can someone send me this pkt sim, thank you much.

    jbg12172001@gmail.com

  42. Tracy
    August 25th, 2013

    Could someone send me this SIM please? I test tomorrow and really would like to have warm fuzzy on this if possible. Email: wm.tracy.oliver@gmail.com

  43. ken
    August 26th, 2013

    Can anyone please send me ospf Lab sim?

    looserest@gmail.com

  44. Atha
    August 26th, 2013

    Can anyone send me the OSPF sim plz, I have my exam tomorrow. Many thanks,
    athaullah123@gmail.com

  45. Ed
    August 28th, 2013

    Grateful if anyone could kindly forward me a copy of this sim please.
    deskom@seychelles.net

  46. Sameer
    August 31st, 2013
  47. Brutos
    September 1st, 2013

    31/08 Passed cant remember if any these came on the exam but this site is still very Valid.

  48. Ryan
    September 3rd, 2013

    Passed my CCNA study hard! 9tut and CCNA_Study_Guide7 its help a lot.

  49. Thyreme
    September 10th, 2013

    Is there any IPv6 question that we can face on the test. I didn’t see any posting in here about that.

  50. big nate
    September 10th, 2013

    another person asking for a copy of the ospf sim losdiablosltd@gmail.com

  51. Publix
    September 10th, 2013

    can someone send me a copy of the pkt for ospf sim publioo@gmail.com

  52. BD
    September 13th, 2013

    Can someone send me the pkt for ospf to firefighter625@gmail.com

  53. Boeh
    September 13th, 2013

    Could someone please send me the OSPF sim for the 100-101 exam to boehmoss@gmail.com

  54. Matthew
    September 14th, 2013

    can someone please send me a copy of the packet tracer lab for ospf sim msiegel85@gmail.com

    thank you

  55. Soon2bCCNA
    September 16th, 2013

    Guys, all I did was use Packet Tracers, load 3 x Custom Made 1841′s connected them with serial cables and configured as per above and configured them from scratch. I also connected 3 x switches to each router Fa0/0 interface and configured their VLAN 1 in the LAN range and configured the OSPF as per above (and I added loopback IP and router ID on each router to really get a grip of it all) made sure OSPF adjacency occurred and pinged from Switch I connected to Boston to the Switch I connected at Lancaster. Learned the whole process in 1 go. Really fun stuff.

  56. Dupacteli
    September 20th, 2013

    Please Guys send me the PK of this lab if someone have it.

  57. Asi
    September 21st, 2013

    Can someone send me the pkt for ospf to always.asif@gmail.com
    Thanks.

  58. gnet
    September 21st, 2013

    Can someone send me the correct OSPF sim for this? need to practice this one.. will have my exam 3 days from now (640-802 CCNA).. and also any tips for those who taken the exam already? thanks much!! blue000111@yahoo.com

  59. Carias
    September 22nd, 2013

    Can anyone send me PKT Lab sim?

    cariasort@hotmail.com

    Thanks

  60. Willy
    September 24th, 2013

    Does anyone have the packet tracer lab for this sim?It would be a great help if you can send it to me at willyjra@yahoo.com or just post the link here on 9tut.Thanks in advance.

  61. Django
    September 26th, 2013

    Build it in PKT .. You will learn it better

  62. Wazif
    October 22nd, 2013

    Can anyone please send me this OSPF Lab sim?

    Wazif@hotmail.com

  63. Suzie
    October 25th, 2013

    Hi can someone send me the OSPF lab sim? suzettesmith10gmail.com

    Thanks

  64. russ
    October 27th, 2013

    what if i use wr to save the configuration instead of copy running-config startup-config, is there something wrong or issue with that?

  65. Anonymous
    October 29th, 2013

    hi can some send me the last ospf lab and eigrp lab mh_oh_2002@hotmail.com and if there is the ipv6 question in the exam thanks

  66. Anonymous
    November 3rd, 2013

    Hi I am preparing CCNA test, can someone send me the OSPF packet tracer file to kanbai6@gmail.com. Thanks!

  67. st_ve33
    December 18th, 2013

    Can anyone send me PKT Lab sim?

    st_ve33@yahoo.co.uk

    thanks

  68. st_ve33
    December 18th, 2013

    Can anyone please send me this OSPF Lab sim?

    st_ve33@yahoo.co.uk

    thanks

  69. hhh
    January 6th, 2014

    pls can some one send me PKT lab sim about OSPF ……. Thanks !
    panduka128@gmail.com

  70. John
    January 10th, 2014

    Instead of using a simulator, I built my own CCNA lab with 3 routers and 3 switches like this exam scenario question based on some suggestions here http://www.certificationkits.com/cisco-lab-suggestions/ I feel it helped me not just memorize answers, but actually understand how to properly configure OSPF in the real world.

  71. Karthik
    January 22nd, 2014

    good 1

  72. Donathien Lagloire
    February 1st, 2014

    it ‘s good

  73. fuad
    February 8th, 2014

    hi, im taking the icnd2 the week coming up and i was wondering if anybody can send me the lab sims if not already on here. it’ll be great help! dominicang2123@aim.com

  74. Rudey
    February 21st, 2014

    pls would someone be so kind as to send me the the pkt sim labs for OSPF, EIGRP and any others that may be out there for ICND2.

    rudey_rudey@yahoo.co.uk

    Thanks in advance.

  75. Tim
    March 12th, 2014

    Why can’t ylu just use IP address 192.168.155.5 with a wildcard 0.0.0.0? Isn’t this supposed to be a Cisco best practice

  76. Adam
    March 25th, 2014

    Hi does anyone now which labs are giong to be on the ICND2 exam pls email me at akamo225@gmail.com

  77. Ciscoita
    March 28th, 2014

    Anyone still getting this lab in the EXAM ICND 2 ?? Thanks guys i would really appreciate it if you tell me.
    Ciscoita.

  78. NetworkPro
    April 2nd, 2014

    Taking ICND2 200-101 tomorrow to try and rap up my CCNA! Here we go!

  79. Justin
    April 16th, 2014

    Has anyone seen any variations of this sim?

    Simply find the subnet the serial interface belongs to and ping? And possibly verify route table is updated?

  80. Justin
    April 21st, 2014

    Can anyone confirm that this is the only configuration SIM on the ICND2 (200-101)?

    Popular SIMs seem to be EIGRP, OSPF and Frame-Relay. NAT and VTP SIMs seem to be eliminated on the 200-101.

    Taking the test in a few days or early next week to renew my CCNA so all the input is greatly appreciated! I’ll be posting an update when I finish mine

  81. kamani
    April 27th, 2014

    would you be able to send the OSPF packet tracer url to upload for CCNA 100-101 exam.

  82. Justin Reply Please
    May 7th, 2014

    Can anyone who took exam lafter sept 30 answer Justin’s question please (1 post above kamani’s one) OSPF config lab sim still in the 200-101 version? or is there a just answer one with show comands…???

  83. Justin Reply Please
    May 8th, 2014

    And were can I find the new OSPF lab^^

  84. Montgomery
    May 27th, 2014

    I am so glad I came across this! This site is awesome! Can anyone send me the .pkt file for this ospf sim? Would greatly appreciate it. My email is Etnom22000@gmail.com. Love this site!

  85. Helper
    May 28th, 2014

    Hi, just curious, I see loads of people asking for the .pkt file for this ospf sim, can some please just post it on this site :-)

  86. Reza
    May 31st, 2014

    I have Visual CertExam and VCE player but with none of them I can practice SIM and Drag and Drop questions, anybody have any idea about this problem? Do you have any software to practice simulation and drag and drop (not simple multi-choice) questions?
    I’ll be appreciate your help.
    my email address: ghahremanlu@gmail.com
    Thanks in advance

  87. Bambi
    June 7th, 2014

    Alright everyone, just passed today with a 933! The Hush dump is pretty accurate along with the questions on this site. Memorize these like the back of your hand so you can spend your brain power on the labs.

    On one of the above labs, someone mentioned that they changed one of the answers to the PPP as the issue (may have been the 6 router one from what I recall). This seems to be true. I eliminated all the answers except for that one. If you get nervous on tests, it is important to really think about what interface you are looking at for each router and eliminate the multiple choice answers one by one.

    Study the hush dump like crazy, and the labs even more so by setting up a packet tracker environment similar to the three labs on the test (OSPF, security simlet and the show lab).

    Good luck!!

  88. kenneth
    June 23rd, 2014

    can anybody send me a vce player please. my email is kenneth.mulaudzi@yahoo.com

  89. Fred
    July 21st, 2014

    Can someone send me a PKT Tracer about OSPF, security simlet and the show lab please, freddybita@gmail.com

  90. charles
    July 31st, 2014

    can someone send me lab packets?
    cgulleyjr@gmail.com

  91. Bacon
    August 2nd, 2014

    Hello All,

    I’ve noticed there is no download .PKT file. So I’ve created this Lab SIM.

    https://www.sendspace.com/file/042ijg

    Good Luck to all candidates :)

  92. Rokan
    September 3rd, 2014

    Thanks Renan

  93. hubuda
    September 11th, 2014

    thanks to Renan for the pkt tracers

  94. Agbor
    September 21st, 2014

    This site is excellent. Please I’ll be taking the test in a week time. Can anyone who have recently taken the test help me with current SIM (ojenagborjnr@gmail.com)?
    Thanks in advance!

  95. Thanks Renan
    October 17th, 2014

    Thanks Renan your awesomeness :-)

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