OSPF Explained | Step by Step

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  • Опубликовано: 29 сен 2024
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    In this video we're going to take a look at OSPF.
    Open Shortest Path First (OSPF) is a widely used and supported routing protocol.
    It's an interior gateway protocol (IGP) meaning it been designed to be used within a single autonomous system. It also falls under the category of Link-state routing protocols.
    Routers running OSPF learn about the enter network in order to create routes. They do this by flooding Link State Updates. There are three steps to the process.
    Become neighbours - Two routers running OSPF on the same link agree to form a neighbour relationship
    Exchange database information - The neighbouring routers swap their LSDB information with each other
    Choose the best routes - Each router chooses the best routes to add to its routing table based on the learned LSDB information
    #ccna #cisco #networking

Комментарии • 527

  • @tcode3564
    @tcode3564 3 года назад +81

    I was send here by my teacher XD

    • @donnyrap
      @donnyrap 3 года назад +3

      Best comment xd

    • @Certbros
      @Certbros  3 года назад +8

      Love it!

    • @ONLYSATORO
      @ONLYSATORO 2 года назад +1

      Luckily cuz ours don't 🙂

  • @loke9868
    @loke9868 3 года назад +1

    the best explanation i have seen so far, great video

    • @Certbros
      @Certbros  3 года назад

      Great to hear! 👍

  • @eddiecaballero9514
    @eddiecaballero9514 5 лет назад +1

    Awesome video! I understand OSPF better than ever after watching this tutorial. Also I hit like but "Rooter" had a lot to with it LMAO! Cheer's mate

    • @Certbros
      @Certbros  4 года назад

      Haha thanks Eddie

  • @jaspreetsinghjhajj5617
    @jaspreetsinghjhajj5617 5 лет назад +1

    you help me to pass my ccna, thank you so much

    • @Certbros
      @Certbros  4 года назад

      Awesome congrats! Welcome to the club!

  • @m-electronics5977
    @m-electronics5977 Год назад

    13:15 where R1 knows the cost of the not directly connected links? Does R1 learns that from the Others? Oder make a Speedtest?😅

  • @networksecuritywithyacin6790
    @networksecuritywithyacin6790 5 лет назад +1

    nice ands simple explanation! . by the way what the tool used for illustration?thanks certbros

    • @Certbros
      @Certbros  5 лет назад

      Thanks! I use After Effects and Premier Pro

  • @ananthece1
    @ananthece1 5 лет назад

    Very Nice explanation of OSPF but not fully covered on this Video.

  • @brianregala3575
    @brianregala3575 3 года назад

    if DR and BDR is elected, isnt the router with the broken link only floods the update to the multicast address of all Designated Router which is 224.0.0.6. Then after the DR receives the update, it floods it to the multicast address for all OSPF Routers which is 224.0.0.5?

  • @bestiny5
    @bestiny5 2 года назад

    Thx man !

  • @anthonybostock
    @anthonybostock 6 лет назад +620

    If this guy says rooter one more time I'm going to become a plumber

    • @Certbros
      @Certbros  5 лет назад +128

      Haha! Just wait until I start talking about data, processes and status!

    • @underratednerd8259
      @underratednerd8259 5 лет назад +1

      Anthony Bostock lol!

    • @AhTu1306
      @AhTu1306 5 лет назад +1

      Lol

    • @paulgutiereziii4792
      @paulgutiereziii4792 5 лет назад +5

      My brother had the right idea, he has his own plumbing company and is doing great. lol !

    • @TheOriginalProfG
      @TheOriginalProfG 5 лет назад +21

      Hahaha. For once there is a person who is using the CORRECT pronunciation. Route not Rowt.

  • @duskears8736
    @duskears8736 3 года назад +118

    The official Cisco coursework for this topic is so wordy and obtuse I really must thank you for posting this video. You explained in 13 minutes what Cisco failed to explain in 15 minutes and several pages of dense acronym-laden text.
    You are the real MVP

    • @Certbros
      @Certbros  3 года назад +8

      Thank you! Sometime it just takes a different point of view to get a good understanding.

    • @adrianavargova
      @adrianavargova 3 года назад

      @@Certbros Exactly. I have my CCNA exam and still struggle with some things. Meaning that I am not going back to those Cisco texts :((( Thank you. It was short and precise.

    • @saic3110
      @saic3110 2 года назад

      @@Certbros i

  • @The_Generalgr
    @The_Generalgr 6 лет назад +192

    What the f*** is a rooter HAHA (Awesome video by the way, very informative and very easy to follow)

    • @XYZ-kw7rj
      @XYZ-kw7rj 6 лет назад +3

      In which country they say 'rauter'?

    • @The_Generalgr
      @The_Generalgr 6 лет назад +2

      @@XYZ-kw7rj It depends on how "rauter" is pronounced lol, I mean we say router in the US (Chicago), but maybe the people in the south with an accent would say "rauter" haha

    • @manishkapri2205
      @manishkapri2205 5 лет назад +2

      lol :)

    • @Certbros
      @Certbros  5 лет назад +5

      Thanks man!

    • @intensenex
      @intensenex 5 лет назад +2

      The brits ofcourse! Ain't nuthing wrong with that

  • @NoorAnomaly
    @NoorAnomaly 5 лет назад +51

    Thank you! I love you videos, clean and simple to understand. There's only so much reading I can take in a sitting! 💖

    • @Certbros
      @Certbros  5 лет назад +2

      Haha! I know the feeling!! Thanks

  • @Ultrasize
    @Ultrasize 4 года назад +46

    Well, this is a perfect background to see how dirty my monitor really is...

    • @UzairAli001
      @UzairAli001 4 года назад

      This color is also best for checking if monitor has dead pixel

    • @Fregmazors
      @Fregmazors 4 года назад

      Same here. That blue background came up and I said, "Oh yeah, I smashed a fruit fly there a month ago."

    • @yancearifiyanto3701
      @yancearifiyanto3701 4 года назад

      Beautifull animation. Can i know what is the software to build it? Thank you

  • @65gtotrips
    @65gtotrips 4 года назад +12

    Just remember ‘IT ELF’
    > Init
    > Two-Way
    > Exstart
    > Exchange
    > Loading
    > Full

    • @Certbros
      @Certbros  4 года назад +1

      Great trick! Thanks.

  • @ayazbandali
    @ayazbandali 3 года назад +11

    It was a great informative video that can help in answering cisco exam questions. Thank you. BTW, we all know rowter or Rooter...at the end of the day it is ROUTER :)

    • @Certbros
      @Certbros  3 года назад +5

      Its pronounced ROOTER 😂

    • @scottsiler2843
      @scottsiler2843 2 года назад +1

      @@Certbros C'mon, y'all add a 'u' in honour and colour but take it out in roUter? ;-)
      Thanks for the video, networking is a *lot* of information, and some of it is pretty dense until you unpack it and wrap your head around it...this vid was easy to understand!!

  • @darnellg8599
    @darnellg8599 3 года назад +12

    This video was absolutely phenomenal! And the joke at the end was priceless.

    • @Certbros
      @Certbros  3 года назад +3

      Haha! Thanks Darnell. Glad you liked it.

  • @victorpolanco2192
    @victorpolanco2192 3 года назад +16

    I've watched about 3 videos regarding the same topic and this is the only video/animation that actually made sense. Great job at explaining a difficult topic in such a simple way! I'm impressed. Thank you!

    • @Certbros
      @Certbros  3 года назад +1

      Glad the video helped Victor. This stuff can get pretty confusing.

  • @JaiSharma-et6dr
    @JaiSharma-et6dr 6 месяцев назад +2

    Please make a video on BGP and IS-IS

  • @Stellzilla
    @Stellzilla 4 года назад +7

    3 minutes in and I think the roota counter is already up to at least 50

  • @marcasr
    @marcasr 2 года назад +6

    Read a lot of recommended books on this topic and also watched a lot of videos.. This one has stuck with me for its simplicity and how well you explain the protocol.. Using some cisco white papers to lab this up in EVE-NG and referring back to this video gave me my "Aha" moment... Great stuff on the channel keep it up.

    • @Certbros
      @Certbros  2 года назад

      Really glad to read this helped it click for you! Keep up the great work Marcais 🔥

  • @AirsideSky
    @AirsideSky 2 года назад +9

    This explanation is so simple and clear you can easily understand even if there are a lot of terms to remember. Awesome tutorial!

  • @m-electronics5977
    @m-electronics5977 Год назад +1

    12:18 where the R1 knows the link costs of links behind R4 f.e. ? Is that information in the LSA?

  • @birarasitotaw6459
    @birarasitotaw6459 4 года назад +10

    I love his explanation on OSPF and Spanning tree protocol!

  • @MrKerol94
    @MrKerol94 6 лет назад +18

    awww a lil bit too late cuz my OSPF quiz was 2 weeks ago.. lulz nevertheless, really appreciate it. It's much, much easier to understand OSPF from your video than reading thick-ass CCNA/CCNP books

    • @Certbros
      @Certbros  6 лет назад

      Ah man! haha. Yeah those books can be challenge at times. Glad you liked the video!

  • @vimukthisineth3490
    @vimukthisineth3490 5 лет назад +7

    This is what I call effective knowledge sharing. Very easy to understand. Keep up the good work.

    • @Certbros
      @Certbros  5 лет назад +1

      Thanks Vimukthi!

  • @michellepennell5306
    @michellepennell5306 4 года назад +1

    Thanks for this. I think I dig OSPF. Fucking hate EIGRP though. Not your video, just the protocol ^_^

    • @Certbros
      @Certbros  4 года назад

      Haha thanks Michelle!

  • @1337-Ramiel
    @1337-Ramiel 6 лет назад +12

    Please make a video for BGP and MPLS

    • @Certbros
      @Certbros  5 лет назад +5

      Will do soon Ramiel!

    • @dakshinahettiarachchi8628
      @dakshinahettiarachchi8628 3 года назад

      Yes.. please make video for BGP and MPLS... Highly appreciated this kind of crystal clear explaination.. !!! No words.. Thank you..!!

  • @isaiahrowley9830
    @isaiahrowley9830 5 лет назад +8

    Do you even cert brah?

  • @blong206b
    @blong206b 4 года назад +1

    84 Dee arrs and Bee Dee arrs disliked this video... don't be a bee dee arr.

  • @nikolayshakin1104
    @nikolayshakin1104 2 года назад +2

    This is the most useful and explanation of OSPF, that is absolutely unbelievable for 13 minutes video. Every word said bears only important information and nothing superfluous, especially rooter =)

  • @matteoiorio5288
    @matteoiorio5288 Год назад +1

    Very well explained, thank youu

  • @punkeyengineer
    @punkeyengineer 5 лет назад +2

    HAHA Dude , I was so fucken mad at you earlier, but you cajoled the situation towards the end of the video . Great work by the way!

  • @ITSAMN88
    @ITSAMN88 5 лет назад +5

    thank you for this easy and simple explanation. keep going 👍🏼👍👍

  • @samira.malsharee7028
    @samira.malsharee7028 4 года назад +3

    Brilliant. THANK YOU SO MUCH for this well illustrated video. love it and became a big fan.

    • @Certbros
      @Certbros  4 года назад

      Thanks Samir 👍 Really appreciate it!

  • @caseysermons6293
    @caseysermons6293 5 лет назад +5

    Great explanation of the steps to form a neighbor relationship

  • @АндрейКозырев-з2ш
    @АндрейКозырев-з2ш 5 лет назад +4

    Best explanation video that I've seen so far. Good job.

  • @agent_mc
    @agent_mc Год назад +2

    What is a rooter?

  • @chinvannak1076
    @chinvannak1076 4 года назад +1

    How to choose the best path if the routers use the same type of interface? They have the same cost.

    • @Certbros
      @Certbros  4 года назад

      If two or more paths have the same cost, OSPF can load balance the traffic.

  • @kumbaya234
    @kumbaya234 3 года назад +1

    why you sound the word ROUTER as ROOTER !! Very funny- Is it british or Indain English ?

    • @Certbros
      @Certbros  3 года назад

      It's how us brits say router 😂

    • @kumbaya234
      @kumbaya234 3 года назад

      @@Certbros Sorry Sir, you have to go with the flow !

  • @asgua5224
    @asgua5224 6 месяцев назад +1

    BRO SAVED ME FROM FAILING THE EXAM

  • @TunaNSweetcorn
    @TunaNSweetcorn 4 года назад +2

    Old mac donald had a farm O - S - P ... wait wrong video

    • @Certbros
      @Certbros  4 года назад

      🤣🤣🤣 this got me more than it should have!

  • @WordizbonDon
    @WordizbonDon 5 лет назад +2

    LMAO. The end was funny. You Brits. lol Well done!

    • @Certbros
      @Certbros  5 лет назад

      Haha Thanks Deshawn!

  • @kingwbm3886
    @kingwbm3886 6 лет назад +2

    Heyho, any plans on extending on OSPF with MultiArea OSPF? Greetings

    • @Certbros
      @Certbros  6 лет назад +2

      Yes!!!! Next video will be multi area I think.

  • @mariamfirdous8456
    @mariamfirdous8456 3 года назад +2

    you are my fav teacher

    • @Certbros
      @Certbros  3 года назад +1

      Thank you Mariam! If only my School teachers could see this comment 😂

  • @damaliamarsi2006
    @damaliamarsi2006 Год назад

    What is a rooter? Don't Allow Idiots To Explain Everything Like Fools. ... Down / Attempt / Init / Two-Way / ExStart / Exchange / Loading / Full.

  • @generalgyan8705
    @generalgyan8705 5 лет назад +2

    Very clean video and easy to understand,upload all ccna videos sir

  • @semtex6412
    @semtex6412 4 года назад +1

    on 5:28, when router 1 moves into a 2-WAY STATE, was it TRIGGERED by the fact that upon receiving router 2's hello, it sees itself as R2's neighbor?

    • @Certbros
      @Certbros  4 года назад +1

      That's exactly right 👌

  • @riadbinsultan1479
    @riadbinsultan1479 3 года назад +1

    Sir, is the CCNA syllabus upgraded after 12 months? I want to learn CCNA now but I will do the job after 3 years (after completing BSc). What should I do at this moment? Please let me know

    • @Certbros
      @Certbros  3 года назад

      After passing the CCNA it is valid for 3 years (whether or not Cisco update the syllabus) after that, you will need to renew the CCNA by either retaking the exam or taking a higher one.
      If you want to learn now the go for it!

  • @HKBERASAPP
    @HKBERASAPP 5 лет назад +3

    Wtf this video is in my recommendations 😂 nice info

  • @HubertoMadalena-rz4xs
    @HubertoMadalena-rz4xs 2 месяца назад

    OSPF - link state
    RIP - distance vector
    note: RIP uses the concept o split horizon to prevent routes from being sent back to neighbouring routers

  • @raviminnikanti2577
    @raviminnikanti2577 5 лет назад +1

    Nice video. If possible please also upload lecture on BGP protocol.

  • @jennykelly4111
    @jennykelly4111 3 года назад

    *Highest OSPF Interface priority.ruclips.net/video/kfvJ8QVJscc/видео.html

  • @joshc7865
    @joshc7865 3 года назад +3

    Rooter protocol 👍🏻

  • @staynjohnson4221
    @staynjohnson4221 3 года назад

    here's the pronunciation 'dilemma'. How do you say these two words:
    "Route 66" (the highway)
    "Network Router"

  • @fishroombum3771
    @fishroombum3771 5 лет назад +2

    Roota old boy, I say! Do you pronounce root "route"?

  • @rouf46
    @rouf46 5 лет назад +1

    Awesom video, in future if you are adding any no like part 1,2,3 then it would be easy for me to see the new uploaded videos one by one

  • @MultiAddy
    @MultiAddy 4 года назад +1

    very good explanation wish you make videos for other topics too including ISIS MPLS etc.

    • @Certbros
      @Certbros  4 года назад

      More videos on the way

  • @PoseidonLP
    @PoseidonLP 7 дней назад

    I think you forgot to tell, that OSPF works on the Dijkstra algorithm

  • @ameymankar3941
    @ameymankar3941 5 лет назад +2

    Please make a video on EIGRP and also on OSPF LSA.

    • @Certbros
      @Certbros  5 лет назад +1

      100% doing this!

  • @FoysalGoniChowdhury
    @FoysalGoniChowdhury 3 года назад +1

    You high quality Learning Video, I was 2002 year CCNA, CCNP, Router and Switching , now revision. Again.. Thank you so much for your Cisco Videos.

    • @Certbros
      @Certbros  3 года назад

      Thanks! Great to hear this videos are helping you brush up on your networking skills.

  • @DevAngelo
    @DevAngelo 3 года назад +1

    Dumb question: is this ospf v2?

    • @Certbros
      @Certbros  3 года назад

      Not a dumb question. Yes, this is for version 2.

  • @hardwiired
    @hardwiired 2 года назад +1

    Thanks for the video!! My college professor has just decided to make his own CCNA assignments with very vague instructions. This has helped!!

    • @Certbros
      @Certbros  2 года назад

      Glad this helped Ethan!

  • @zanamasuod7886
    @zanamasuod7886 5 лет назад +2

    Your videos are very helpful very well illustrated hope you have more videos, especially on CCNA course.

    • @Certbros
      @Certbros  5 лет назад

      Thanks Zana! More video are in the works.

  • @deepaksky
    @deepaksky 6 лет назад +2

    Great and easy explanation. Really happy to see you are back with more videos. Please do a video on subletting. thank you.

    • @Certbros
      @Certbros  6 лет назад

      Thanks man! More videos coming and subnetting is definitely on the to-do list

  • @TheSecurityAgency
    @TheSecurityAgency 3 года назад +5

    Rooter: A Methodology for the Typical Unification of Access Points and Redundancy.
    Update : the joke alone at the end definitely deserved a like . lol
    Excellent explanaton.

    • @Certbros
      @Certbros  3 года назад +1

      HAHA 😂 Glad I able to redeem myself!

  • @GDNetworkingNewbie
    @GDNetworkingNewbie 4 года назад +1

    nice explanation

  • @_aibeats
    @_aibeats 5 лет назад +2

    Those 13 minutes saved me 13 hours!! Thanks a lot .

    • @Certbros
      @Certbros  5 лет назад +1

      Haha. Thanks Rafiul

  • @networkingwithh4716
    @networkingwithh4716 4 года назад +1

    well explained.

  • @sidikicamara3669
    @sidikicamara3669 4 года назад +2

    Haha i did question myself about the rooter word LOL

  • @bhatumar3593
    @bhatumar3593 Год назад

    With DR and BDR does it mean we are more likely using centralised routing system?

  • @edwardv4546
    @edwardv4546 2 года назад +1

    Thank you. I’m going to watch this a few more times until it completely clicks.

    • @Certbros
      @Certbros  2 года назад

      Good luck Edward. You'll get it! 💪

  • @atharvamalhar7101
    @atharvamalhar7101 4 года назад +1

    By any chance can I get these slides please

    • @Certbros
      @Certbros  3 года назад

      Sorry, this video wasn't made with slides.

  • @soundsgalactic
    @soundsgalactic 3 года назад +1

    They're called routers. Not rueters.

    • @Certbros
      @Certbros  3 года назад +1

      That's what I said... routers 😂

  • @David-bk9ic
    @David-bk9ic 5 лет назад +1

    good video just one queston what happens in ospf when router goes down ?

  • @belferroummohammed8006
    @belferroummohammed8006 3 года назад +1

    Sooooo wonderful things realy its a pleasure to watching. This kind of vedios i wish you do more information like that .

    • @Certbros
      @Certbros  3 года назад

      Thank you! Great to hear you liked the video. More to come.

  • @ashukadam341
    @ashukadam341 Год назад

    Auto Subtitle also doesnt find his pronounciation "ruto"...😂

  • @codethemonkey
    @codethemonkey 3 года назад +1

    Explained better than my professor at university managed to do. Thanks

  • @qt7664
    @qt7664 Год назад

    only DR is starting talking sending Hello message? or any router can start and send hello message?

  • @michaelsamuel5354
    @michaelsamuel5354 3 года назад +1

    Really nice explanation on OSPF , was straight forward and easy to understand

    • @Certbros
      @Certbros  3 года назад

      Thank you Michael!

  • @Ramel34
    @Ramel34 2 года назад

    I thought the reference bandwidth was 100 Mbps?

  • @razeproduction4443
    @razeproduction4443 Год назад +1

    Fantasticly made! I love how smoothly the diagrams represent the narration. Although, my brain twitches when i hear route pronounced as root in an IT setting 😂

  • @terrymtasa
    @terrymtasa 4 года назад +1

    This awesome do have a full playlist for ccna 200-301

    • @Certbros
      @Certbros  4 года назад

      Working on it now!

  • @jaronprovidence9484
    @jaronprovidence9484 4 года назад +1

    dude, you are awesome.....thanks for the clearly explained video.

    • @Certbros
      @Certbros  4 года назад

      You're welcome. Thanks Jaron!

  • @apartfrom925
    @apartfrom925 6 лет назад +2

    One good video about ospf. Good explanation.

    • @Certbros
      @Certbros  6 лет назад

      Thanks man! Appreciate it.

  • @faisalak7
    @faisalak7 3 года назад +1

    thanks very good just too many adds

    • @Certbros
      @Certbros  3 года назад

      Thanks for the feedback. Glad you like the video. I just let RUclips place the ads.

  • @04chavez
    @04chavez 5 лет назад +1

    Thanks you

  • @RafaThomaz
    @RafaThomaz 4 года назад +1

    Thank you for the video. I would be great to see you guys explaining BGP too

  • @williesolomon614
    @williesolomon614 2 года назад +1

    Yes. You' ve simplified OSPF in a very impressive explanation. Thanks for sharing your very clear video tutorial.

    • @Certbros
      @Certbros  2 года назад

      Glad you liked it! Thanks for viewing 👌

  • @AllenAndersonTaylor
    @AllenAndersonTaylor 5 лет назад +2

    Is there a transcript of this

  • @underratednerd8259
    @underratednerd8259 5 лет назад +2

    Such a great video. Thank you!

  • @happyjuice4251
    @happyjuice4251 3 года назад +1

    It's pronounced router NOT router!

    • @Certbros
      @Certbros  3 года назад +1

      I think you'll find its router

  • @cmillett85
    @cmillett85 4 года назад +2

    Great video! Made me laugh at the end. I plan on getting my CCNA in the spring of next year. Thank you so much for helping on my journey to it.

    • @Certbros
      @Certbros  4 года назад

      Thanks Chris! Good luck with your studies!

    • @brianconner1212
      @brianconner1212 3 года назад

      Did you do it?

    • @cmillett85
      @cmillett85 3 года назад

      @@brianconner1212 No, not yet!

  • @karanarora202008
    @karanarora202008 Год назад

    does anybody knows the name of the animation tool used for these videos?

  • @disneykidzshowhd4377
    @disneykidzshowhd4377 4 года назад +1

    great explanation, do you videos for every topic for CCNA?

    • @Certbros
      @Certbros  4 года назад

      Thanks! More videos comming

  • @javlonnurmatov422
    @javlonnurmatov422 4 года назад +2

    really cool explanation for seniors

  • @mohamedattouchi4834
    @mohamedattouchi4834 3 года назад +1

    Your videos are just like telling a story in an attractive way.. keep it up ! love your content

    • @Certbros
      @Certbros  3 года назад +1

      Thank you Mohamed! Really appreciate it 👍

  • @azatkhan4714
    @azatkhan4714 4 года назад +1

    Well DONE if you want to refresh what you know.
    Thank you

  • @WaleBusari
    @WaleBusari 6 лет назад +1

    like your video did you have any full video for ccnp switch, route and tshoot

    • @Certbros
      @Certbros  5 лет назад

      Thanks Wale! No CCNP videos yet

  • @HangoutCouples
    @HangoutCouples 4 года назад +1

    Awesome. Keep doing more videos like this. Very informative.

    • @Certbros
      @Certbros  4 года назад

      Thanks Shijo. Working on more videos now