OSPF Framework & OSPF Packets: LSDB, LSA, Hello, DBD, LSR, LSU, LSAck

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OSPF Framework & OSPF Packets: LSDB, LSA, Hello, DBD, LSR, LSU, LSAck

Рет қаралды 59,330

Күн бұрын

OSPF makes use of three tables: Neighbor Table, Topology Table, and a Routing Table. The Topology table in OSPF is referred to as the Link State Database (LSDB). Each entry within the topology table is referred to as a Link State Advertisement (LSA). In this video we'll unpack each of these terms.
Then we'll take a look at the types of OSPF Packets: Hello Packets, DBDs, LSRs, LSUs, and LSAcks (Database Descriptors, Link State Requests, Link State Updates, and Link State Acknowledgements). These five packets are involved in every OSPF conversation.
To get the most out of this series, you should watch these pre-requisites:
👉 Networking Fundamentals series:
• Networking Fundamentals
👉 Routers and how they work:
Everything Routers do:
• Everything Routers do ...
How Routers forward packets:
• Everything Routers do ...
Router Hierarchies & Route Summarization:
• Router Hierarchies and...
👉 Distance Vector vs Link State // IGP vs EGP
• EGP / IGP :: Distance ...
👉 Route Precedence and Router Path Selection
• Route Precedence -- Ho...
0:00 - Lesson 1 Intro
1:01 - OSPF Neighbor Table
2:59 - OSPF Topology Table, LSDB, and LSAs
5:40 - Routing Table
7:01 - OSPF Packets
7:17 - OSPF Hello Packets
8:17 - OSPF Database Descriptor Packets (DBDs)
9:34 - Link State Requests, Link State Updates, Link State ACKnowledgements (LSRs, LSUs, LSAcks)
10:16 - OSPF Built-in Reliability
10:44 - Sharing LSAs with OSPF Neighbors
11:33 - Outro
💬 Join us on Discord:
pracnet.net/discord
📜 More free CCNA resources:
www.practicalnetworking.net/i...
#ospf #lsdb #lsa

Пікірлер: 193

@PracticalNetworking 2 жыл бұрын

📌 *More free preview lessons from the Practical OSPF course:* pracnet.net/ospf 📌 *Want even more? Check out the full course:* pracnet.net/ospfcourse

@catalyticcentaur5835 2 жыл бұрын

Yup, I think so. Makes it less abstract or more graspable. Although, I've forgotten if you brought this in your live cast. Did ya? I could check it, because usually, I download stuff from YT that interests me. Just refer to the first two sentences of this paragraph/comment.

@fatikawtar9316 2 жыл бұрын

Thanks for the video i think it's good to commands results

@PracticalNetworking 2 жыл бұрын

@@catalyticcentaur5835 Nope, that part was new since the live cast. But glad you think it's helpful. I think it is too.

@PracticalNetworking 2 жыл бұрын

@@fatikawtar9316 Great, glad to hear it =)

@karenward2655 Жыл бұрын

I am studying to take the CCNA exam and have searched KZfaq as well as Google and have yet to come across anyone who explains the subject at hand in a way that is very easy to understand. For example, subnetting I watched tons of videos on subnetting and still was not able to grasp the concept until I watched Ed’s ” Subnetting Mastery” video, I finally understand how to subnet thanks to Ed’s teaching. 👍

@PracticalNetworking Жыл бұрын

@malexherron 2 жыл бұрын

best networking channel on youtube hands down

@PracticalNetworking 2 жыл бұрын

@tpawaits550 2 жыл бұрын

A concise explanation of OSPF. We NEED MORE of this in various topics PLEASE 🙏

@PracticalNetworking 2 жыл бұрын

More on the way =). Your "Awaiting" will be rewarded! ;)

@leroiobi5928 Жыл бұрын

@@PracticalNetworking Can't wait for your EIGRP and BGP series. Your beautiful mind will make them easier to grasp.

@qaiserwaseem5431 6 ай бұрын

It's hard to believe as a CCNA student, this video just covered all of the doubts and questions I had for this particular topic. Extremely well explained. 👏

@surenderaireddy7541 2 жыл бұрын

OSPF concepts explained very simple and straight forward up to the point. Thank you , Eddie Harmoush.

@PracticalNetworking 2 жыл бұрын

Thank you, Surender =). Cheers !

@adedejiemmanuel1 2 жыл бұрын

Thanks. The content is great; I'm learning everyday. Your presentation is sincere. Your production is of high quality; I marvel at the the effects from 'page to page'. I'm humbled that you do so much for free to free us from our limitations. You're my very best teacher. Aside, I always feel that you should be known and celebrated as much as other players on social media. Sad that charlatans are praised more, 🙁😏. Honestly, you're a gold mine. You're so sincere and passionate about this content. Thank you.

@PracticalNetworking 2 жыл бұрын

Whoa, thank you so much for the kind words. I'm truly grateful you appreciate the content and have learned from my videos. I, too, wish that more people could get this type of help/training when they are trying to learn Networking. I sure wish I did as well when I was first learning!

@matthewcardinal4186 Жыл бұрын

I really appreciate your lessons. Very clear, concise, and easy to understand. Please keep up the amazing work.

@stephenl5121 Жыл бұрын

I have watched all these OSPF videos. They are brilliant, so clear and easy to understand. Thank you very much

@eh597 Жыл бұрын

I gotta say, you are amazing at teaching networking. I hope your channel continues to grow, so that you continue to push out educational content.

@ramyagandhi-vc4cp Жыл бұрын

Super clear, concise, and very easy to understand. Great Job.

@inderdeepsingh4076 2 жыл бұрын

Thank you for creating an OSPF series. Awesome!!

@PracticalNetworking 2 жыл бұрын

You're welcome, Inderdeep. Glad you've enjoyed it =)

@wwolfram33 2 жыл бұрын

The show commands added much to my learning of this lesson. It helps me recall what the different show commands 'show'. It also reinforces the content that was presented and confirming/verifying it which will be helpful to me during troubleshooting. Thanks!

@PracticalNetworking 2 жыл бұрын

Excellent. I think I liked the effect of them as well. I'm planning to include them more often in the rest of the series as well. Cheers, Ward!

@techwithmuchiri5921 2 жыл бұрын

One of the best OSPF explanations, working towards getting my CCNA and this was really helpful. Would love to see such videos for the other routing protocols too. Great work, cheers.

@PracticalNetworking 2 жыл бұрын

Glad you're enjoying this, Tony. Do check the full series: kzfaq.info/sun/PLIFyRwBY_4bSkwy0-im5ERL-_CeBxEdx3 Noted about other routing protocols. If you're interested, I covered EIGRP on my blog: www.practicalnetworking.net/stand-alone/eigrp-terminology/ www.practicalnetworking.net/stand-alone/eigrp-metric/ www.practicalnetworking.net/stand-alone/eigrp-feasibility-condition/

@Rigel_Kuriom_Mandara 4 ай бұрын

An exceptional presenter and educator. Thanks!

@priyasingh-qj4ng 2 жыл бұрын

Thanks for starting OSPF series , As always your teaching style is awesome...

@PracticalNetworking 2 жыл бұрын

Glad you enjoyed it, Prashant. You're welcome!

@4skinntim420 4 ай бұрын

This content is pure gold!

@MikeyMyco Жыл бұрын

Excellent content. I just came across your videos while studying for my CCNA and your explanations have shone light on some points where I had become stuck. Thank you sir.

@PracticalNetworking Жыл бұрын

You're very welcome, Pedro! Glad you enjoyed them!

@crixisaow-odi7139 10 ай бұрын

Thank you very much for the clear and practical explanations of the material. I'm studying and working full time and your videos are very helpful, much appreciated.

@PracticalNetworking 10 ай бұрын

You're very welcome. I'm happy that you're enjoying this series =)

@iamjoycheee 5 ай бұрын

magnificent!!! thank you sir! I'm commenting before the video ends cause this deserves the right to be on the algorithm .

@thomaspaterik3506 2 жыл бұрын

I have read and viewed numerous OSPF presentations. This was the very best. Clear and concise. Only suggestion is to slow down a little.

@PracticalNetworking 2 жыл бұрын

Thanks for the kind words, Thomas. Hope you enjoy the rest of the OSPF video as well. Noted about the pace. Does KZfaqs playback speed controls help? You can slow me down to .5 or even 0.25 speed if you need.

@gatty. 2 жыл бұрын

You're the first guy I've heard say why to actually like, comment and subscribe. Fantastic video! I really like your teachings :D

@PracticalNetworking 2 жыл бұрын

Thank you, Gatty. I appreciate the kind words. And the help w/ the algorithm =). Cheers!

@stops_n_snaps Жыл бұрын

Thank you for your wonderful teaching, ospf concepts are very clear from this video

@PracticalNetworking Жыл бұрын

You're very welcome, Pramodh. Glad you enjoyed it.

@bhagyashreeaher7429 7 ай бұрын

Thank you for this great series !!!! Happy learning

@vladislavkaras491 Жыл бұрын

Very great explanation! Much better than provided by Cisco themselves! Thanks for the video!

@adrianmuscat452 10 ай бұрын

Great video, really helped me to understand the different terms for packets and tables and how they relate

@sergioalcantar3290 9 ай бұрын

As always expertly done.

@marks5850 2 жыл бұрын

Awesome. Straight to the point. My style of learning!!!! Thank you!

@PracticalNetworking 2 жыл бұрын

You're welcome =).

@olegasgolubevas8773 3 ай бұрын

Thank You for making such a high quality material!

@PracticalNetworking Ай бұрын

You're very welcome, thank you for supporting the channel.

@ankur9829 Жыл бұрын

fabulous fantastic Trainer with perfect explanation mode.

@PracticalNetworking Жыл бұрын

Thanks, Ankur ;)

@bangvu2245 4 ай бұрын

Well said and explained. Many thanks

@user-oe7sj9we7z Жыл бұрын

Excellent video, as all the rest on this channel

@nateruttinger8145 Жыл бұрын

Commenting for the algorithm, and giving obligatory thanks! awesome, digestible content.

@PracticalNetworking Жыл бұрын

Thank you for the support, and you're very welcome. Glad you enjoyed the content =). Hope you enjoy the rest of the OSPF series as well!

@Therojasvictor 10 ай бұрын

Excellent teaching.

@sabtenamsite6865 2 жыл бұрын

thank you soooo much. it is most understandable explanation about OSPF I ever seen

@PracticalNetworking 2 жыл бұрын

Glad you enjoyed it, Sabtenam. Hope you enjoy the whole series: pracnet.net/ospf Could you do me a favor? Do you mind sharing this video on Linked In, Reddit, Twitter, Facebook, or any other social media you use? As an independent creator, that would be an _enormous_ help, and I would appreciate it _greatly_ .

@Quick_UnBoxing0 Жыл бұрын

Amazing explanation sir...waiting for your ccna video meanwhile learning OSPF. Thank you for step-by-step explanation with examples and summary that helps a lot.

@PracticalNetworking Жыл бұрын

Glad you enjoyed these Jojo. Cheers !

@kwiatriot6190 2 жыл бұрын

Great content! Thanks for all that you do.

@PracticalNetworking 2 жыл бұрын

You're welcome, Kwiat =)

@Pbist1998 2 ай бұрын

Keep up the good work! Great Video!

@kisali777 2 жыл бұрын

Your explanation are simple and clear

@PracticalNetworking 2 жыл бұрын

Thank you, Kisali!

@Don-Carillo 2 жыл бұрын

Cheers ,Ed. Great start to no doubt another great mini course from you. Looking forward to the stubby, not so stubby and totally not so stubby area explanations. Really struggling to get my head round them 😫.

@PracticalNetworking 2 жыл бұрын

Oh yes! That's going to be great fun. =) Cheers, Don!

@devinmayhew1 2 жыл бұрын

Fantastic content, can't thank you enough for this!

@PracticalNetworking 2 жыл бұрын

You're very welcome, Devin. Don't forget to check out the whole series: kzfaq.info/sun/PLIFyRwBY_4bSkwy0-im5ERL-_CeBxEdx3

@Sraj659 Жыл бұрын

Very interesting and fruitful contents that you ed are making.... Thanks a lot..

@antifics 2 жыл бұрын

Thanks! High Quality content. Greetings From Chile!

@PracticalNetworking 2 жыл бұрын

You're welcome. Greetings from Seattle =)

@BekoIQ 2 жыл бұрын

No one like You in all KZfaq , you are the best always

@PracticalNetworking 2 жыл бұрын

@Ramel34 Жыл бұрын

Can you do a full CCNP/CCIE series? It's hard to find someone that can break it down CLEARLY like you do. The animation is on point, you're not jumping all over the place, the video isn't 2 hours long, you're speaking English lol, and so on.

@PracticalNetworking Жыл бұрын

Thank you for the kind words =). I've considered it many times ^_^

@jonov2550 Жыл бұрын

Indeed! I'm not yet done with CCNA Certification. But this explanation was so absolutely on point and clear to understand. Please consider something like a CCNP course on YT or Udemy? I'd surely pay for that. Top content!!

@PracticalNetworking Жыл бұрын

@@jonov2550 Thanks for the kind note, Jo. CCNA/CCNP is a project I think about _constantly_ . Who knows what's in store for the future =)

@shujauttali2608 Жыл бұрын

We will wait for your ccie series. 😊

@vszabad Жыл бұрын

Currently preparing for a technical interview that will include OSPF and BGP. This is very handy for me, thank you so much!

@PracticalNetworking Жыл бұрын

Good luck w/ the interviews! Happy to hear this series is helping!

@nicksonkosi Жыл бұрын

How did the interview go?

@tiagonovembre5465 2 жыл бұрын

Very helpful material. thanks for sharing it.

@PracticalNetworking 2 жыл бұрын

You're welcome. =)

@syedshah9836 Жыл бұрын

Excellent work

@arshdeep1286 Жыл бұрын

Lot of blessings sir

@milandinda9966 Ай бұрын

Best Teacher 🙂

@ciscobatais2 11 ай бұрын

excellent explanation 👍👍

@afshin9 2 жыл бұрын

I love the way you teach, keep it up buddy

@PracticalNetworking 2 жыл бұрын

Cheers Afshin =)

@afshin9 2 жыл бұрын

@@PracticalNetworking 🙏

@herteert299 Жыл бұрын

The best teacher ever.

@PracticalNetworking Жыл бұрын

@DeepakKumar-ov8ko 2 жыл бұрын

Very nicely explained ..you are fabulous 🙏

@PracticalNetworking 2 жыл бұрын

Thanks, Deepak!

@mcsleverrrflowers4849 2 жыл бұрын

You're the definition of the G.O.A.T.

@PracticalNetworking 2 жыл бұрын

@flyboyrj360501 11 ай бұрын

Nice session !!!

@PracticalNetworking 11 ай бұрын

Glad you enjoyed it, Flyboy =).

@shahadatanwar4109 2 жыл бұрын

Awesome explanations

@PracticalNetworking 2 жыл бұрын

Thank you =)

@alexandrkovalsky1711 Жыл бұрын

great video!

@kwest30038 Жыл бұрын

07Sept2022 >> Thank you for explaining OSPF. I'm studying for my CCNA. thank you again....

@PracticalNetworking Жыл бұрын

Good luck w/ your CCNA. Glad you enjoyed these !

@wwolfram33 6 ай бұрын

Fantastic!

@ronigrish6219 Жыл бұрын

amazing explaination

@rohanofelvenpower5566 Жыл бұрын

this series is very educational and sexum

@subee128 5 ай бұрын

Thank you very much 🙏🏻

@billmichae Жыл бұрын

Superb presentation

@PracticalNetworking Жыл бұрын

Thank you, Bill. =)

@SOGUIREL 7 ай бұрын

Very good content

@jairunet 2 жыл бұрын

@Practical Networking, wow simply explained, very easy to understand for those with any fuggy understanding like me, excellent fundamentals, thank you so much! and I looking forward to the next video areas and router types!

@PracticalNetworking 2 жыл бұрын

Glad you enjoyed it, Jair! Next video releasing Monday morning =)

@sudhakardornadula2507 7 ай бұрын

Thanks for Sharing the Knowledge. wishing u happy new year Advance...

@syedamehak7277 Жыл бұрын

Amazing 🔥

@NaniRaja1986 2 жыл бұрын

Super sir.. explanation was too good 👍

@PracticalNetworking 2 жыл бұрын

_too_ good! ;) I'm hoping they continue to get better!

@JKRowl 11 ай бұрын

God bless you man! I THINK I'm about to break my curse for years, AKA the OSPF!

@PracticalNetworking 11 ай бұрын

Wohoo! Hope this helps get you through to "getting it" with OSPF. CHeers !

@JKRowl 11 ай бұрын

@@PracticalNetworking Thank you so much sir, I really appreciate. Im struggling with the OSPF mode types and the SEQUENCE of operation (what happens first - hello packets or down state or multicatsing) hence Im trying to figure it out. But making progress daily thanks to you :)

@PracticalNetworking 11 ай бұрын

The neighbor adjacency video will help, I think it's #4 in the series: pracnet.net/ospf

@ershadramezani6716 6 ай бұрын

it was perfect. thanks !

@PracticalNetworking 4 ай бұрын

You're very welcome, thank you for supporting the channel.

@ElnurHuseynov-zo2ee Жыл бұрын

Thank you so much.

@VibhavShinde 5 ай бұрын

THis is so amazing.. commenting for better reach

@PracticalNetworking 4 ай бұрын

Thank you for your support =)

@kebekitechnology1223 4 ай бұрын

Nice teacher

@browneyedbabes7863 Жыл бұрын

👏🎬 Thank you so much!!

@PracticalNetworking Жыл бұрын

@muhammadsalmanshaikh3359 2 жыл бұрын

Great lecture!!! Please make videos on advanced topics like ISIS and BGP from beginning

@PracticalNetworking 2 жыл бұрын

Noted about BGP. THat comes up a lot =)

@rickwiers1905 Жыл бұрын

Nice content....

@meunomeeBJJ Жыл бұрын

Thank you.

@charlesikpeme7777 2 жыл бұрын

Awesome!

@PracticalNetworking 2 жыл бұрын

@r.f9823 9 ай бұрын

Very good

@khelouiazzeddine3113 2 жыл бұрын

Thanks very interesting

@PracticalNetworking 2 жыл бұрын

You're welcome, kheloui . =)

@luchiripaul917 2 жыл бұрын

Thanks a lot.

@PracticalNetworking 2 жыл бұрын

You're very welcome =)

@eitanfeigenbaum763 10 ай бұрын

GREAT!!

@PracticalNetworking 10 ай бұрын

Glad you enjoyed it, thank you for being a channel member =)

@MB_72282 Жыл бұрын

Awesome.

@PracticalNetworking Жыл бұрын

Cheers, Mahdi. Thank you =)

@syedaquib1082 2 күн бұрын

This man is LEGEND🫡🫡🫡🫡

@user-wx7ny3pw8t 7 ай бұрын

nice thank you

@georgeavong4937 Жыл бұрын

thank you

@mohanraj4405 2 жыл бұрын

Very nice video🇮🇳

@PracticalNetworking 2 жыл бұрын

Thank you, mohan raj.

@davidjimenez2992 Жыл бұрын

great !!

@PracticalNetworking Жыл бұрын

👍

@vskreddy2416 Жыл бұрын

Awesome

@dnj20 Жыл бұрын

great video

@PracticalNetworking Жыл бұрын

Thank you, DNJ. Hope you enjoy the rest of the OSPF series as well: pracnet.net/ospf

@dnj20 Жыл бұрын

@@PracticalNetworking yeah. it really helped me understand OSPF. I shared it with my cisco course mates

@PracticalNetworking Жыл бұрын

@@dnj20 Thank you for your support =)

@mudtruka9196 2 жыл бұрын

Ed, thank you for a great series. Question, is a "summary of LSA's" an actual list of summary routes?

@PracticalNetworking 2 жыл бұрын

You're welcome. Yes, more or less it's simply a list of all LSAs a router has (not just summary routes or summary LSAs). In Lesson 6 I give you a PCAP file, you can take a look at some DBDs to see exactly how the LSA summary in the DBD is different from the actual LSA sent in the LSU.

@nikhilkarale8588 Жыл бұрын

Hello sir It will be a huge favor of you make such videos on bgp & Mpls too !

@PracticalNetworking Жыл бұрын

Hi Nikhil, noted =).

@nikhilkarale8588 Жыл бұрын

@@PracticalNetworking huge respect ♥️

@ovis Жыл бұрын

thanks

@waverache8296 2 жыл бұрын

Good

@doaaomar133 2 жыл бұрын

Thank u

@PracticalNetworking 2 жыл бұрын

You're welcome !

@rabbitsswag5029 Жыл бұрын

Thanks for this informative video. Can two routers in diffferent OSPF areas can communicate if they are not connected to AREA 0? Also why all routers need to communicate to area 0?

@PracticalNetworking Жыл бұрын

Great question =). It's answered in the lesson on Areas: kzfaq.info/get/bejne/ebNpdc93raiXoWg.html

@afshin9 2 жыл бұрын

Thanks

@PracticalNetworking 2 жыл бұрын

Thank you for supporting this channel, Afshin. Glad you enjoyed this video / content.

@afshin9 2 жыл бұрын

@@PracticalNetworking 🙏

@jhde9067 2 жыл бұрын

Is this series the same as the live stream from last time?

@PracticalNetworking 2 жыл бұрын

Nope! That live stream covered the "beta" of lessons 1-5. All this is new content that has never been taught on my channel. =)

@jhde9067 2 жыл бұрын

@@PracticalNetworking it was very good. Was looking forward to watching that as well.

@PracticalNetworking 2 жыл бұрын

@@jhde9067 Sorry, I mis-spoke. I just released Lesson 6 and thought your comment was to the Lesson 6 video. Yes, Video 1-5 I did a live stream of way back when before I recorded the final videos. The final videos have a little more content in them than the live stream videos. Lesson 6 and on are all new though.