MicroNugget: Cisco OSPF Areas & LSA Types Explained | CBT Nuggets
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In this video, CBT Nuggets trainer Jeremy Cioara explains Open Shortest Path First (OSPF) areas and Link State Advertisement (LSA) types. This is a blisteringly fast introduction to OSPF Areas and LSA types, crucial and complicated topics if you're dealing with OSPF configurations.
If you're dealing with OSPF configurations, you're dealing with Areas and LSAs.
When you begin with OSPF configurations, you must create Area 0. Some businesses never grow beyond this so-called backbone area. But as the business begins to grow and you begin adding more routers, your routing table can get pretty unruly.
If there are too many routes, too many changes with networks going up and down, or processor cycles getting wasted, it’s important to break into multiple areas.
In Link State Protocol, all routers in the area must have the same link-state database. The only way to hide routes or do route summarization is to break into multiple areas.
Different areas include Stubby, Totally Stubby and Not-So-Stubby Areas. Yes, that's actually what they're called.
Stub area is where you have an area that’s limited in what information can receive. Cisco allows for totally stubby areas which makes traffic highly efficient. A not-so-stubby area camouflages external routes for the sake of expediency.
LSAs interact with the traffic and only some areas permit different LSAs. See which with Jeremy's explanation.
0:15: Backbone area, explained
0:55: Standard areas and stub areas
1:40: Cisco's totally stubby areas
2:15: Not-so-stubby areas
3:10: LSAs, Type 1 through 5
4:30: Which areas allow LSAs, and which
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Пікірлер: 203
This five minute video did a lot better than two chapters in the Cisco books. Great work.
@jeff_mci_gaming6018
7 жыл бұрын
Cisco purposely makes things sound more difficult than they really are...quite annoying.
@abinjoseph9808
5 жыл бұрын
@@jeff_mci_gaming6018the main draw back for cisco is that they tell the details but not the story
@connorrundell7648
4 жыл бұрын
@@abinjoseph9808 That's a great way to explain CISCO.
@mrgoodvibes1253
3 жыл бұрын
@@jeff_mci_gaming6018 THANK YOU! It is so fucking true!
@arghosinha1424
3 жыл бұрын
Can't agree more.
crazy, i've just spend like 3 hours studying this and you just show it to me in 5 minutes... Give this man a medal!
@jasonlarcome3008
8 ай бұрын
I literally just said the same thing to my girlfriend and she had no idea, but I am amazed! Definitely a medal!
"I'm gonna sit down now, and breathe in a brown paper bag" Golden. :) Thanks Jeremy!
I understood it perfectly, it's not meant to be viewed by absolute beginners but by people that already know them and just want a quick refresh. Excellent job.
Not only did you explain so much in so little time, but you did it without saying 'uh' or 'um' once. That's damn impressive.
We are glad you enjoyed this MicroNugget and we want them to do exactly that! Thanks for the feedback.
Thanks for this video, it is the most helpful and straightforward way to explain areas and LSA types! Most every other source including official Cisco press make it so convoluted, videos like these are a blessing!
This is literally the most awesome OSPF LSA networking explanation I've ever seen.
I've been watching videos of 30 min explaining this concept and didn't understand like i did with this one, thank youuu.
most amazing fast explanation i ever seen,thanks jeremy,you are my cisco learning godfather,i achieved CCNA certificate because of your nuggets and also almost achieved the CCNP route exam 742/790,,,,retaking the exam in 3 days with gods help.....
@cbtnuggets
9 жыл бұрын
AWS SAAD Thanks for the feedback! We will pass along your comments to Jeremy. Congratulations on earning your CCNA and good luck with your CCNP! Keep us updated on how the exam goes!
@evanmeyer989
2 жыл бұрын
Its been 3 days. So did u make it?!
I appreciate this fast explanation style. It helps me get the material sooner so I can move on to other subject matter. I can always play it again if I miss something.
Shit! You burnt through pages and pages worth of material in minutes! Loved it. Only, going to hit replay button several times to grasp all of it! :P
@anonymously_me1803
3 жыл бұрын
Right!
Exactly what i needed. I have to learn 500 pages and do a lot of exams aspart of my preparation to my final exam, such videos are perfect for me 🙂
I had to watch it twice in a row, but those were the most effective 11 minutes I've spent on CCNP. Kudos to Jeremy.
Jeremy I love all your videos. Keep up the good work. You rock. If I may be allowed to add a few lines to your masterful and fun method of teaching. LSA & Area Types Relationship: Stub = Block 4 & 5 LSA NSSA = Blocks type 5 LSA originated from backbone area but allow type 7 originated from within the NSSA (nonbackbone area ASBR). Totally Stub = Totally (block3LSA) + Stub (block 4&5 LSA) Totally NSSA = Totally (block 3LSA) + NSSA (block 4&5 LSA but allow type 7) + Stub (block4&5 LSA) "Totally" means Block 3 LSA (Cisco proprietary configured only on ABR) in addition to whatever LSA's are being blocked by the word following "Totally". e.g. Totally stub: Block 3 LSA in addition to the ones already blocked by the word "Stub" which are 4 &5 "Totally" Is not on itself an area type.
kept repeating a nugget for days regarding LSAs. This is the first time i understood it! Micronuggets work! Thanks Jeremy!
The legend, straight to the point and simple as always
I was amazed how you explained in just 5 minutes and I was studying with some video tutorial trying to explain it for hours . Cisco even make it very unclear . Thank you very much .
This was well done. When I first started learning about LSAs it was so dry and boring I thought I'd die from the dullness. This video clearly explained what LSAs are and did it in a short time, a mark of a good teacher.
This was the fastest and clearest Explaination of the LAS Types :) What others try to explain in 1 Hour got summarized and optimized in 5 minutes. Good job.
Holy shnikeys! This is Jeremy after 10 shots of espresso!! This is best explanation I've ever heard or read. Concise and to the point. I never fully understood stub, totally stubby and NSSA until this video. Now it's very clear what the differences are and what they represent. And I actually love the fast talking. It makes you stay focused out of fear of missing something lol Nicely done Jeremy!!!!
That was excellent! You did a great job at conveying the concepts clearly in the most succinct way possible. Thank you!
This is the best OSPF video the Internet has ever been blessed with. Awesome work Jeremy!
Good quick stuff before any meeting with TAC or Interview, Hats Off , Love from India
Thanks for the feedback Francis! We love to hear when our Nuggets or MicroNuggets help people learn.
Every time I see this I am astonished how you guys simplify all this. Kudos!!
@cbtnuggets
4 жыл бұрын
Thank you Mubeen!
oh man i had to read and watch these videos 3 times in order to understand Areas and LSA types.
Great video!! You are wonderfully explaining OSPF Types in less than 6 minutes! Well done!
That was amazing. _I_ need a deep breath after that. Thanks!
The magic OSPF Areas summary which reflect great knowledge and experience, thanks jermy for that nuggets
I'm proud Jeremy has Romanian roots. He is the best! Thinking of going for CCIE from CCNP.
You're actually a weapon, you are helping me so much with my learning, thank you!
This is the best explanation of OSPF Areas and LSA types I have come across. :)
Tonnes of info about LSA Jeremy!!!! Awesome 👏
@cbtnuggets
3 жыл бұрын
Glad you liked it!
Jeremy, I LOVE how you get to the point! I have ADHD and this helps me A LOT! YOU'RE A LIFE SAVER! THANKS SO MUCH!
@cbtnuggets
3 жыл бұрын
We're so glad to hear you enjoyed Jeremy's video! Thank you for learning with us.
Lmfaooooo "Eh they're really type 5's." 😂😂😂😂 Great work on the video, impressive presentation.
Awesome man! That was the fastest and the best. I listed a few video to go through all, but this one was enough.
Jeremy you are my teacher since many years, i enjoy listening to your voice and your lovely jokes. You are the master of Networking. Can't thank you enough. Please produce more of these videos and make your own channel. Hope to see videos on Virtualization and AWS/Azure from you soon.
Jeremy never fails to amaze me.
great video! of course u must have a good knowledge already to fully understand this video, but it is a great way to quickly remember all about OSPF area and LSA types. AWESOME
this video save my life......reading 30 pages in the text book still hardly understand why those are being use
awesome! i was struggling with this topic, went through many videos but this one is perfect.
Great explanation in 5 minutes. Thx a lot dear Jeremy
Awesome👏🏻👏🏻👏🏻👏🏻 i revised my lsa and area knwledge in 5 mins
Very well explained, thank you Jeremy
Really Fast, nicely explained and straight to the point. I liked it alot, thx.
Pure GOLD !! thanks Jeremy !!
Thank you for being your amazing self as always.
Excellent explanation on OSPF LSA topic
Seriously, just awesome. Thank you Jeremy, I think I'm armed to pass my CCDA now. Keep up the amazing work! :]
@WicksBF
4 жыл бұрын
Thank you so much Jeremy! I had a bunch of questions on OSPF areas for my exam and I managed to pass by 12 points. You are THE MAN!!! 😆❤️
Best OSPF video ever. Nice job.
Thank you for the concise and clear explanation!
He is the one hell of the best speaker i've heard. Thanks Sir jeremy for making videos and uploading to yt.
Here's the reason why you are my favorite instructor. Video's over; you can breathe now :"))"
wow you really did a service for humanity friend. excellent review
CCNA I don't fear you no more, I've Jeremy on my side!
after 8 years , still the best....
Jeremy you are the MAN! i'll bookmark it ...
You're the best Jeremy!
I wish everyone give a training like you do fast intresting good job
fast to the point , good job!
Basically we redistributed and summarized about 5 days worth of Cisco knowledge into 5 minutes. Now thats what I call route learning summarization ;)
Great Jeremy! It's the best explanation I've ever watched!
Two words.. clear and concise.
@Jeremy, Simply awesome....areas and LSAs ...so easily explained,in such less time...!!!
This is a fantastic video, as you said at the beginning of the video its such a tough subject but this video has made it easy to learn! Thanks :)
@cbtnuggets
10 жыл бұрын
You're welcome!
Excellent in short !!!
Amazing explanation. Thank you!
Awesome explication! OSPF areas made simple.
got to admit it was fast!!! but indeed good work. Keep it up!!
Good work! Very useful as a refresher
Amazing explanation in record time!
@cbtnuggets
4 жыл бұрын
Glad you liked it, Diego! Thank you for the kind words.
Jeremy is a legend!
Thank you Jeremy for the wonderful explanation. Btw, I just passed CCNA 1st August 2022. God bless you.
This is just perfect! You did an awesome job! Thanks a lot for your video! :-)
Clear as mud!!!
Amazing video, died at the "Huh, they are really Type Five"
THE BEST OSPF VIDEO!
Great explanation, best seen so far.... Thanks.
THIS IS SO AWESOME!!!!
thanks a lot Jeremy, you always rock👌👌
thanks for the great work!
Jeremy, you are my hero...
I will subscribe to cbt just because of Jeremy
I hope one day I can shake Jeremy's hand and thank him
fantastic! good job
You are very welcome!
That was a pretty good explanation!!!
Fantastic!
Wow dude you got talent!
In 5.5 minutes covers the types of LSA's including the OSPF "Ninja" OSPF type 7 LSA's on an NSSA.
I love you Jeremy!
Best explanation ever!
Thanx Jeremy I need that explanation :D
CBT Nuggets guys are GENIUS!
hmm. I understood as I followed along, but I´m going to have to watch this one a few more times.
Rishab, Thanks for the feedback. Jeremy is an excellent teacher. Could you be a little more specific in your question? The CBT Nuggets training series will cover all material needed to pass the specific exam.
I understand!!! Thank you!
That was GREAT.
Great job loved the video!!!!!!!!!