Free CCNA | OSPF Part 2 | Day 27 | CCNA 200-301 Complete Course
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In this video, Day 27 of my free CCNA 200-301 complete course, you will learn about OSPF, Open Shortest Path First. OSPF is a link-state dynamic routing protocol, as opposed to the distance vector routing protocols RIP and EIGRP. You will study OSPF metric, OSPF neighbor adjacencies, and some additional OSPF configuration.
In this FREE and COMPLETE CCNA 200-301 course you will find lecture videos covering all topics in Cisco official exam topics list, end-of-video quizzes to test your knowledge, flashcards to review, and practice labs to get hands-on experience.
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0:00 Introduction
0:47 Things we'll cover
1:39 OSPF Cost
4:01 Changing the reference bandwidth
5:30 OSPF Cost (cont.)
10:11 OSPF Cost summary
11:06 OSPF Neighbors
12:58 Neighbor states - Down
13:55 Neighbor states - Init
14:33 Neighbor states - 2-way
15:55 Neighbor states - Exstart
17:11 Neighbor states - Exchange
17:52 Neighbor states - Loading
18:53 Neighbor states - Full
19:51 OSPF Neighbors summary
22:11 OSPF Message types chart
22:41 OSPF 'show' commands
24:23 OSPF Configuration (cont.)
26:27 Things we covered
28:22 Quiz 1
28:56 Quiz 2
29:57 Quiz 3
30:52 Quiz 4
31:41 Quiz 5
32:45 Boson ExSim
#cisco #CCNA
Пікірлер: 280
If anyone finds this helpful, my Cisco teacher used "Demons In Texas Eat Eels Like Fries" to help my class remember the order of the ospf states
@JeremysITLab
2 жыл бұрын
Haha, I like it
@Kisnowar
2 жыл бұрын
Hey, that's pretty good. I almost got it after the first time. I'd pin it.
@02stampede
2 жыл бұрын
That's perfect! The more ridiculous it sounds, the more likely you are to remember.
@c7po457
2 жыл бұрын
Thanks! This is really helpful. I learned it on the first try!
@Smithy_7895
Жыл бұрын
For some reason this seems to help it stick - Thanks
ERRATA: At 4:57, I said 'The 100 megabits per second I configured as the reference bandwidth...' . It should be *100,000* megabits per second (or 100 *gigabits* per second). At 6:44, it should be '100 ( R1 *G0/0* ) + 1 (R2 L0) = 101', NOT '100 (R1 *G1/0* ) + 1 (R2 L0) = 101' At 31:10, the command should be 'auto-cost reference-bandwidth'. There is a missing hyphen.
@WhoData5816
3 жыл бұрын
Hi, am one of your great fan, and I sincerely appreciate your effort. Am preparing for my ccna 201-300 exam by November's and I only depend on your source. please can you recommend me another source because it seems your's is not going to complete soon
@SakshiKumari-lc5wb
3 жыл бұрын
@@WhoData5816 Udemy course of neil anderson. Boson Net sim exam
@mohanshetty4474
3 жыл бұрын
I have unsolved network topology so So can u plz share ur email I'd I will send it to u Can u plz help me out sir
@EnglishChannelOfficial
Жыл бұрын
You should pin this comment.
Here i am wishing i had discovered these videos before i took my exam. So finely detailed and precise in presentation. I feel like i have fallen, then woken up with a massive light bulb on in my brain. You have a genuine gift for teaching.
@JeremysITLab
Жыл бұрын
Thanks for the kind words, Kevin! And thanks for being a channel member :)
Jeremy, I just want to thank you for your time and efforts in making this video series for the CCNA. You explain things very well. Now that I'm all caught up, I'm looking forward to every Sunday when you release a new course video. You are a rock star sir!!! :)
@JeremysITLab
3 жыл бұрын
Thank you, Christopher :)
That boson question today was excellent, did a wonderful way highlighting how routers choose paths
This Monday pass the CCNA! I am really excited. Your videos helped me a lot. Thank you very much Jeremys!
@JeremysITLab
3 жыл бұрын
That's awesome Jhilmar! CCNA is a very tough exam so I'm sure you studied very hard! Good job ;)
@sheru9229
3 жыл бұрын
What resources did u use to Pass the exam plz?
@TheGamingChannel100
3 жыл бұрын
@@sheru9229 I plan on using the official cert guide by Wendell Odom on top of Jeremy's course, should be more than enough to pass. Also make sure to do the flashcards and labs daily, best way to preserve knowledge and memorize the ios commands.. www.ciscopress.com/store/ccna-200-301-official-cert-guide-volume-1-9780135792735 www.ciscopress.com/store/ccna-200-301-official-cert-guide-volume-2-premium-edition-9780135262719
You know what's the best part, your clinical execution in making your video understandable and more logic, keep I the good work, I'm a ccna 201-300 aspirant, already been working under an isp company , role network technician
The names, master router and Slave router had me on the ground laughing xD Great Content!
I don't know how to thank you, Jeremy, I started this course with 0 knowledge but now I completely understand everything, thank you so much . wish you good luck and long-lasting life,
thank you so much Jeremy for all of these videos (ccna course) i`m so grateful and happy since i found your channel. i`ll tell you when i pass ccna!!! following you from south Africa .
very good lecture, thorough and clear, in depth, many thanks to Jeremy for the hard work.
I'm still going with the course Jeremy! My exam is booked in too. A cool thing I noticed today is that the captions on these videos are extremely accurate.
@JeremysITLab
3 жыл бұрын
When's it booked for? Good luck! These videos are all scripted so I just upload the script and KZread does the timings for me, it's quite easy :)
@StuartTufft
3 жыл бұрын
@@JeremysITLab July 5th. I've been conservative with the time I've allowed myself but I'm feeling good about it. I'm doing a few sections at a time and then consolidating the information by re-running the labs. Sometimes the captions help me concentrate more and I imagine they're great for none native English speakers.
@nelsoncorreia7293
2 жыл бұрын
@@JeremysITLab I second this. very grateful for your captions.
It amazes me how you know all this information.
@JeremysITLab
3 жыл бұрын
I do a lot of review and take notes before making these videos!
This is the best explanation of the OSPF neighbour. Very appreciated.
@JeremysITLab
3 жыл бұрын
Thank you, I'm glad to hear that :)
Jeremy you’re doing a great job, made it look easy! btw : The following fields in the OSPF Hello packets must be the same on both routers in order for routers to become neighbors: subnet, area id, hello and dead interval timers, authentication, area stub flag and MTU. I think that it is important to know for CCNA.
@JeremysITLab
3 жыл бұрын
Thanks! All of that is in the OSPF part 3 video ;) (except for stub area flag, you don't really need to learn stub areas for CCNA I think)
This is insane !!! how detailed way you can describe the thing beyond imagination.
Hi Jeremy, This is an outstanding video series. I love it. Thank you so much...!!!
Another superb presentation. Very clear and concise as always.
Thank you for this amazing lecture. you help me to understand the concept of network topology. Much gratitude!!!
You are just awesome. Great tutorial. I have introduced your channel to some friends. Keep up the great work.
@JeremysITLab
3 жыл бұрын
Thank you for introducing my channel :)
Jeremy ....the best so far.
Very interesting and practical! Thank you!
@JeremysITLab
3 жыл бұрын
Thank you Marius!
Waiting for the whole lessions finished soon, then I can follow the CCNA exam . Thank you ,Jeremy.
@JeremysITLab
3 жыл бұрын
Thank you for your patience ;)
Another video for this amazing learning journey, thank u Jeremy ^^
@JeremysITLab
3 жыл бұрын
Thanks Muhaned :)
@muhannedbelaid8849
3 жыл бұрын
@@JeremysITLab hello Jeremy. i just want to ask you a little question concerning the CCNA Gold Bootcamp for Neil , the price on his website is 99$ , but the price on UDEMY is almost 20$ ?? is it the same course with the same course content ? I hope u answer me . Regards.
Thanks Jeremy! Great content as always!...
@JeremysITLab
3 жыл бұрын
Thanks Nicholas!
Best teacher on the internet!
ERRATA: At 6:41 100(R1 G1/0) + 1 (R2 L0) = 101 it should be 100(R1 G0/0) + 1 (R2 L0) = 101. That means the R1's exit interface is G0/0 not G1/0. By the way, thanks for the great content @Jeremy ✌️❤️
Thank you for another wonderful video
I am following the Neils Cisco CCNA boot camp in order to continue with my studies and be able to present my test in November this year. But I will happily pay for a full course dictated by you. an awesome job with the videos and amazingly easy to understand the topics.
@JeremysITLab
3 жыл бұрын
Thank you, I'm glad to hear that! Once I finish up these videos I might add some extra labs etc and package them as a full course.
Thank you Jeremy! Great lesson as usual.
@JeremysITLab
3 жыл бұрын
Thanks Alberto! 👍
Very good! Thank you! Can' t wait for the next one!
@JeremysITLab
3 жыл бұрын
Thank you, next is coming on Sunday ;)
Thank you Jeremy this is very helpful.
@JeremysITLab
3 жыл бұрын
Thank you, glad to hear that 👍
Thanks for this wonderful class, great work so far. When do you plan on posting videos on NAT, ACLs and DHCP? Thanks again Jeremy
@JeremysITLab
3 жыл бұрын
Not sure about exactly when!
Thank you. You are the best teacher
Thank you Jeremy for this explanation, there are too many questions about ospf more than the other routing protocol in all ExamSimulations I have , I am sure by the end of all ospf videos I would be bold to answer them correctly
@JeremysITLab
3 жыл бұрын
Yeah OSPF is a big part of the exam! I think over the 3 parts I made everything needed for the CCNA is covered ;)
I'm in the last video. I finished by taking notes. very useful content thank you.CCNA for my exam preparation
@JeremysITLab
3 жыл бұрын
Thanks Emirhan, glad you like the videos! The course isn't complete yet, so I will continue to release a new video every week ;)
Jeremy is the coolest guy on earth ❤️
Thank you very much Jeremy. You have a great content.
@JeremysITLab
3 жыл бұрын
Thank you, I appreicate your comments :)
Great explanation Sir!!
Nice Jeremy, your information is very useful
@JeremysITLab
2 жыл бұрын
Thanks Vishal :)
Thank you for these free videos!
@JeremysITLab
3 жыл бұрын
Thanks for your comments, as always ;)
Thank you very much for these
A great job! Please make video on ospf area types and lsa types.
@JeremysITLab
3 жыл бұрын
Thank you! Those topics aren't really necessary for the CCNA, so if I make a video about them it will be much later!
Thank you for your great explanation.
@JeremysITLab
3 жыл бұрын
Thank you for your support! :)
Thanks Jeremy my guy. Fantastic
@JeremysITLab
3 жыл бұрын
Thanks as always ;)
Well explained. Thanks 🙏
@JeremysITLab
3 жыл бұрын
Thank you, I'm glad to hear that :)
Thx Jeremy for the video
Amazing. I m improving my knowledge
Dear Jeremy, thank you very much for all your efforts in providing such a great tutorial. Please note that in quiz 4 of this lesson, there is a mistake in the correct answer, "reference-bandwidth" is the correct form.
you start feeling down then you initiate your day on a 2-way street you go your ex starts a convo and u exchange info now you start loading her and you're full
Very great thank you so much for your time everything Hamed Adam
Thanks Jeremy!
@JeremysITLab
3 жыл бұрын
Glad you like it ;)
Thanks!
Hello Jeremy, i have 2 questions about the Exstart and Exchange State. 1) Why in the Exstart state the routers send a first DBD packet ? Is it to set like an initial counter from the next DBDs sent in the EXCHANGE state? 2) These DBDs are a unique packet in which first the Master and then the Slave send ALL the LSAs header descriptions or they send (in turn) multiple DBDs packets each with a single LSA? However i can't stop to thank you. You definitely need a statue in the centre of CISCO quarter.
Thank you so much!
@JeremysITLab
3 жыл бұрын
Thanks Youssef!
Thanks Jeremy
@JeremysITLab
3 жыл бұрын
Thanks for watching Mohamed :)
I can't thank you enough everytime i finish watching each videos. You are a very great Sensei! Arigato Gozaimasu!
thank you so much , no questions this time. :D
@JeremysITLab
3 жыл бұрын
Thank you :)
thanks lot for your efforts
@JeremysITLab
3 жыл бұрын
Thanks for watching and leaving a comment :)
tysm
I'm still trying to say Router on a stick without laughing and now i learn there are Masters and Slaves Routers ? oh boy 😂
@JeremysITLab
3 жыл бұрын
Haha, 'master' and 'slave' are actually pretty common terms used in different areas of IT.
@christianyaerger1751
2 жыл бұрын
Don't kink shame. XD
@VeryBigBang13
2 жыл бұрын
😂😂
Thank you sir
Thank you, Jeremy, for this video, my piece is that, even while am planning to re-certify the CCNA some topics might still be difficult, however, this should not be a showstopper as we can still carry on and book for the exam, am sure not everything will be clear at once, we need to be on the project, do more practice labs...read more OSPF, Etherchannel, subnetting, we figure the rest out along the line.
praise be our lord and savior, channel failed to load
Thanks man
@JeremysITLab
3 жыл бұрын
Thanks as always, Glenn 👍
I smashed the like button to show appreciation --> 600th like :)
@JeremysITLab
3 жыл бұрын
Thanks David ;)
Thank you for your videos Jeremy, they are very helpful. As you mention here 5:20 about changing the reference bandwidth on all OSPF routers in the network! Do you mean to change the reference bandwidth in the entire network or just into that area which those routers are a part off!
@JeremysITLab
3 жыл бұрын
Change it on all routers that are running OSPF
Hello, I would like to welcome you to Jeremy's IT lab. Jeremy loves Cisco very much.
❤❤❤ thank you
@JeremysITLab
3 жыл бұрын
Thanks Martin!
Great content as always, thank you Jeremy!
@JeremysITLab
3 жыл бұрын
Thanks Donald, glad you like it!
what would i do without jeremy!!!!
Thank you mr jeremy ! When will your ccna course get fully completed ?
@JeremysITLab
3 жыл бұрын
Early next year, I think!
Was Waiting....
@JeremysITLab
3 жыл бұрын
Thanks for waiting ;) New video every sunday!
Thank you so much for making these amazing videos. You've explained all the concepts very well and in detail. You're certainly the best teacher! When will your CCNA course get fully completed?
@nutboy93
3 жыл бұрын
Someone asks this on every video I swear 😂 my guess is once a week till he hits about 60-70 in the playlist total
@JeremysITLab
3 жыл бұрын
Haha yes I answer this question about 5 times a day. I guess it will be finished early next year.
@umamaheshwari1081
3 жыл бұрын
@@nutboy93 Hahaha i know 😅 it's just that his videos are amazing and easy to understand. Eagerly waiting for the rest of his video lessons.
So thats why R4's default route had both routes in the routing table.
I actually DO have 100 Gbps links on my network. They are on Cisco 9500 series /w QSFP28 transceivers using 100GBaseFR. I run two of them in LACP between a Firewall Rack and a Core.
When you are at the message type slide @ 22:27, are you talking about the different LSA message types?
Hej Jeremy thank you for the nice course :) . I would like to know if you will cover HSRP and ACLS in the near future?
@JeremysITLab
3 жыл бұрын
HSRP is coming up after OSPF Part 3, ACLs will be a little later in the course!
@sensesound1359
3 жыл бұрын
@@JeremysITLab Great than you!
@sensesound1359
3 жыл бұрын
@@JeremysITLab Great thank you! :) I have been trying other courses but you are the most pedagogic person of all of them, and I have learned a lot with your videos. Muchas Gracias!
I didn't know that OSPF can be enabled with the interface in CCNA Bootcamp or maybe I missed it. Thanks for the extra knowledge! Will keep watching your video although I had completed my CCNA test. Still thinking of getting a CCNP but it costs quite high for me.
@JeremysITLab
3 жыл бұрын
The 'network' command method is more common, but the interface method is quite convenient! Best of luck on the CCNP, it's a tough certification!
Great content. Thank you very much!
I am studying for a month maximum and then taking the Exam. I want to work in the cloud but I think a CCNA certification will look great on my resume, especially since I have no experience but hold CompTIA A+, Network+, and Security+ certs
Just great videos, but still had to repeat days 26-28 just to remember all the new commands and put them on the same page, as a recommendation could you put a list of all commands used on a given video? or something similar, I now this could be pushing more efforts on your part because you already make amazing videos, thanks for making this free.
At 6:44, in 5th point, I think it should be 100 (R1 G0/0) + 1 (R2 L0) = 101 !
@JeremysITLab
Жыл бұрын
Indeed! You're right.
Is there any condition for configuring IP for Loopback interface? Like only private address used or public like 1,1,1,1 2,2,2,2 can also be used?
Why did we say that to reach R2's L0 interface, it has to leave it? It doesn't have to leave it to reach it. Is it more of like just an added fee for going to a Loopback address inside a networking device?
@AfikJones
Ай бұрын
Did you ever find the answer for this? I don’t understand it either lolol
Does that mean we must configure the same reference bandwidth on all router in the network for ospf to work well?
Nice to see the like/dislike bar without any blots (dislikes)
@JeremysITLab
3 жыл бұрын
Oh, this is probably my only video like that! Awesome :)
First, thanks for your effort what will be the ospf cost if fastethernet interface in router 1 linked to gigaethernet interface in other router after change reference to 10000? in another way , how will calculate ospf cost of routers linked with different type of interfaces?
Thanks, jeremy! It's a great explanation. Im going for the boson ExSim. where can i get a discount?
@JeremysITLab
3 жыл бұрын
Thank you! I'm not aware of any discounts at the moment.
@birajbanker8937
3 жыл бұрын
Check Reddit. r/CCNA also, currently there’s a MERRY25 discount code
12:43 - Jeremy, you said OSPF messages are encapsulated in IP header. I suppose more correct will be: "OSPF messages are encapsulated in IP packet". Not header.
Thank you Jeremy ! i bought a copy of Nexim but i still not finished the course yet ! what you reccomend ? use it before finishing course or i can select topics from it ? thank you again ! we are all supporting you and thankfull for what you are doing !
@JeremysITLab
3 жыл бұрын
Hi, I guess you mean ExSim? I recommend saving it until you have studied all of the exam topics! Then use it to find your weak points and review them.
Hi Jeremy, I have CISCO Packet tracer 7.3.0 64bit installed on my machine and the labs from days 27 forward are not compatible with this version. Kindly say what version of Packet tracer you used for the labs. Thanks
why is it recommended in 9:30 min to change the bandwidth reference and then the interface cost? I understood that no matter if we don't change the reference bandwidth because if we change the interface cost that's what's gonna remain (so in the end the reference bandwidth will have no importance). Did I understand it wrong?
It seems like the reference bandwidth is a flaw in the OSPF infrastructure. Is it that way due to lack of foresight? It doesn't make sense that a gigabit and 10gig link can be equally valued.
at 25:34 how could command "router ospf 1" been executed in interface configuration mode "R1(config-if)" and not global configuration mode "R1(config)"????
Hey Jeremy, if you see this, at 21:26 you mention OSPF shares DBD in both exstart AND exchange states. Is this the same DBD shared twice?
@birajbanker8937
3 жыл бұрын
20:59*
@JeremysITLab
3 жыл бұрын
Yeah that's right. The first DBDs are just to determine who will start the exchange, after that the real exchange occurs.
@birajbanker8937
3 жыл бұрын
@@JeremysITLab hey thank you so much man. I passed the CCNA yesterday! Your videos were an integral part of my studying process. The morning of, I refreshed my knowledge by watching your VLAN and IPv6 vids. without you, I would've been stuck with Keith Bogart's videos from INE. No flack on Keith, but they were so dry man. From the bottom of my heart, thank you so so much
about the References Bandwidth if you change it at global config mode is not recommended? instead you better change it in each interface it’s bandwidth value ?
@JeremysITLab
3 жыл бұрын
I think standard practice is to change it at global config mode
@gerryvalenzuela9158
3 жыл бұрын
@@JeremysITLab thx jeremy 🙏🏼
thank you for boson quiz,, it tricked me to answer A😅
Please make automation videos, as it has been introduced in syllabus of ccna 200-30. It's my huge request... Thank you for such useful videos,
@JeremysITLab
3 жыл бұрын
I plan to cover automation at the end of the course! :)
@sahilgrover7
3 жыл бұрын
@@JeremysITLab ok, how long it takes to get that?
Hi all, maybe someone can help me understand this process step: During the neighboring process (step 3, "2-way"), both routers exchange theit RIDs. In the next state (step 4, "Exstart"), both Routers try to be the master using DBD packets. I don't understand why they need to negotiate master/slave in step 4 if R1 (RID: 1.1.1.1) already knows that R2 (RID: 2.2.2.2) has a higher ID from the previous step 3? Maybe I'm missing here something. Cheers! BTW: Jeremy, thank you for your great content!
@alialiraqi2664
Жыл бұрын
same questions did you find an answer to it? it seems unlogical at first sight xD
@alialiraqi2664
Жыл бұрын
might be new messages are sent to determined it?
@kensliye94
6 ай бұрын
I was thinking that too, looks like waste of time and resources