Free CCNA | OSPF Part 3 | Day 28 | CCNA 200-301 Complete Course
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- เผยแพร่เมื่อ 7 มิ.ย. 2024
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In Day 28 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 network types, OSPF neighbor/adjacency requirements, and OSPF LSA types.
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
0:54 Things we'll cover
1:40 Loopback Interfaces
3:32 OSPF Network Types
5:07 Broadcast network type
7:38 Broadcast - DR/BDR Election
9:17 Broadcast - OSPF Priority
15:09 Point-to-Point network type
16:19 Serial Interfaces
20:37 Serial Interfaces summary
21:24 Point-to-Point (cont.)
21:47 Manually configure OSPF Network type
22:44 Broadcast vs Point-to-Point chart
23:13 OSPF Neighbor Requirements
32:57 OSPF LSA Types
35:57 Things we covered
37:20 Quiz 1
38:09 Quiz 2
39:04 Quiz 3
40:01 Quiz 4
40:53 Quiz 5
42:58 Boson ExSim
#cisco #CCNA - วิทยาศาสตร์และเทคโนโลยี
Welcome to Jeremy's IT lab. Jeremy hopes that you will stick around till the end of the quiz so he can show you an Ex-Sim Max bonus question. Jeremy used Ex-Sim Max to pass his CCNA on the first try. The picture on the upper right is Jeremy leaving the exam building.
Lol, love your comments!
You probably dont care at all but does any of you know a tool to log back into an instagram account..?
I was dumb forgot the login password. I would appreciate any help you can give me.
Hahaha
@@lennoxridge1609 hey Lennox! When you go to log in, there will be a button under the password field that reads "forgot password"
If you click that button, it will prompt you to put in some info and otherwise instruct you on how to reset your password
Thanks
I dont understand
I choose this video to comment because this is where I wanted to give up. But it got easy once I pushed through.
I got my CCNA today, and all thanks to you jeremy.
Every time I opened a new video I spent few minutes reading comments of people thanking you for helping them pass their CCNA, I knew I would write my own comment soon and here it is.
My study for CCNA was 6 weeks and I only used your videos. I did not use any other study materials, It was just your videos day 1 to day 63 + Boson.
I barely finished all your labs (maybe 25% labs) and did few flashcards (only hard topics). I would suggest anyone that is preparing, that you always recap what you study, in portions. That is what helped me retain all of this in short time.
I used Boson to make sure I filled my knowledge gaps.
I would 10/10 recommend Boson, without it I would not be able to fill my knowledge gaps.
Thank you Jeremy!
Congrats on passing the CCNA, Sirish! Well done :) So glad to hear my videos helped. 6 weeks is very fast - you must have studied very hard! And thanks for the tip - I appreciate it
@@JeremysITLab yes, it was faced paced. But i knew i got do it because of how easy your explanation was to understand.
For me it was two videos a day on weekdays and 3 videos every sat and sun( day 1&2 3&4 5&6 etc)
So that was 16 videos a week. Doing this I finished the playlist in 4 weeks. Last 2 weeks was my prep. Used boson only the last week of prep.
I could do this only because of the hardwork you put into your videos.
There are very few courses that have day wise playlist. You are a good teacher wish you all the best with whatever you are trying to achieve next. 🤝🏼
Thank you so much for your efforts Jeremy. You made OSPF easy to learn by your step by step guide on the process. So far I am learning from your every video looking forward to finish this course soon. Thanks again!
Great study material as usual. I was looking for a way to start a CCNA certification and I stumbled up on this great series MONTHS AGO and never looked back.
Thanks Jeremy
Thanks, I'm glad you like it :)
Hello Jeremy, I was off for a while, just came back to the videos, in fact big thanks to you for the ospf cos I have been thinking it's a nightmare topic but with your teaching , it is so easy just need only practice and flashcard, thank you so much
Welcome back! Glad to hear that :)
Thanks for being a long time supporter!
With no disrespect to other Courses altough i bought them but you are my main resource to pass the CCNA
Thank you for the great lesson! 23:12 additionally point to multipoint ospf network type also uses hello 30s dead 120s, that used to be "gotcha" thing ccie proctors would try when inserting faults into your network or being asked to make timers be certain values without using the "ip ospf network" command. 31:52 changing the network type changed the default hello/dead timers, these can be changed back to match to make it kind of work despite having a different network type configured.
Hey, Jermy thanks for this video. I had to watch this a couple of times. The flash cards really helped me to sink all the facts in to my memory. 😀
i have increased my CCNA skills after watching your videos.
very good content and method of teaching.
Thank You.
Thanks, glad to hear it!
honestly, I have many trainers and teachers in various IT subjects. now Cisco training courses in Vienna. I also learn (must ) via your channel through you. Because seriously, you transfer your know-how really well and efficiently. and learning cisco with you makes a lot of fun. greeting from Vienna Austria
Thank you for your comment, I'm glad you like the course :)
Excellent OSPF instruction Jeremy. Good job!
Sending Love from India.. Really awsum.. I have started your course And nothing more required than this.. So grateful..
Thank you! Glad you like the course :)
Thank you always for these amazing networking tutorials.
Finally, I caught up with all your CCNA videos today. Now, I cannot wait to watch your new video every Sunday like when I was waiting for CBS or TNT shows a couple of years ago.
Haha I love your comment! Glad to hear it ;)
@@JeremysITLab Thank you. I will watch your Packet Tracers labs as trailers while waiting.
what a wonderful lecture! many thanks to Jeremy.
watched OSPF all parts x2 times another day in the box. Thanks Jeremy.
Jeremy is a LifeMaker. Hatsoff man
You are an absolute God send my friend. IDK why I love networking so much, but I'm an uber nerd for it.
Big THANK YOU!! Jeremy for the wonderful explanation. Great effort! Appreciate it
Thank you :)
This is such an amazing content. I took other ccna courses and they didn't come close this level of details let alone the quizz at the end. Overwealing but fantastic as you give us the best chances to pass our ccna
JJ you the man, thanks bruh. Def review waiting for practical Sunday. God bless
Thanks Glenn, always glad to see your comments!
This man must be protected at all costs! :-) . Thanks a ton!
I've always liked your videos. Thanks for this one.
Thanks, Stephen :)
Great explanation. thank you jeremy, thank you so much !
That Boson ExSim question was a good one. Adjacent vs Neighbor tripped me up good.
Hi Jeremy. Thank you for another great lesson! On the last boson question I wrongly guessed E
No worries about the wrong answer! The Boson questions are tough, and a good opportunity to learn.
I am watching your video from Russia. It is a very good job. Thank you!
Thank you Alex!
Great explanation! Can't wait for the lab video.
Thank you! The lab video will be the last OSPF video for the course ;)
Great content as always Jeremy! Thank you
Thanks Nicholas!
Keep it up jeremy. It is good video. Your video is easy to understand. Love to hear your update
Thank you, I'm glad to hear that :)
"You were my drother Anakin!"
"Stay at the ship R2"
please share the videos more often than once a week, i am following your course and each time i cant wait to see the new video thank you
Sorry, I don't have enough time to make videos more frequently.
Jeremy's IT Lab its ok love u 👍🏻
Wonderful content. The great Keith Barker even recommended you!
Wow, that's an honor!
Thanks for your clear explanation
jeremy thanks for spreading your knowledge
Thanks for watching and leaving a comment :)
Thanks Jeremy!
Thank you Jermy for these amazing lectures. Last night I attempted CCNA OSPF module exam without watching the final lecture, and I got a score of 90%. Can you believe it?
Thank you Jeremy this is very helpful.
Thanks Umair :)
Just FYI to those prepping for the exam, I saw a lot of questions regarding non-braodcast and other OSPF types. Non-broadcast and point-to-multipoint Non-Broadcast networks do not allow multicast packets. To configure OSPF to send unicast updates, you must configure neighbor routers with the neighbor command (like jeremy says in the videos). Broadcast & P2P allow multicast packets so manual configuration of neighbor routers with the neighbor command is not needed.
Did you take the exam...and did you pass?
@@pedrohartman5973 barely. Was pretty brutal tbh. Jeremy’s course is definitely the absolute minimum you need to know.
@@cdialpha Thanks! Did you use the anki cards?
@@pedrohartman5973 not a ton. Maybe for the first few sections. I thought they were a bit too granular. Like you don’t need to memorize broadcast addresses… but you do gotta be able to recognize them. (Hope that makes sense)
@@cdialpha It does. Thank you. Currently on day 32...!
Thanks a lot jeremy ❤
My head is going to explode LMAO
Sounds like a good time to take a break! Review some topics you've already learned, do some labs, etc ;)
Excellent tuition. Thanks
Thanks Lanre!
0:01 Introduction
0:56 Things we'll cover
1:41 Loopback Interfaces
3:33 OSPF Network Types
5:09 Broadcast
7:40 DR/BDR Election
9:17 Change OSPF Priority
15:10 Point-to-Point
16:21 Serial Interfaces Overview
20:43 Summary
21:25 Point-to-Point continuation
22:45 Quick Review Chart
23:13 OSPF Neighbor Requirements
32:58 OSPF LSA Types
36:18 Things we covered
37:21 Quiz!
Cheers! I gotta go back and add your other timestamps to the older videos ;)
Hi Jeremy, question about Quiz 2, in the lecture you stated that in the broadcast network type routers only form full adjacencies with the BDR and DR and so being that R1 is a DR is that the reason why R1 has 4 adjacent neighbors? If R1 was a DRother that is when it would only have 2 full adjacencies and 3 regular neighbors correct?
DRother interfaces only will form a full adjacencies with DR and BDR. The Result is going = Full State.
DRother interfaces will not perfrom full adjacencies with another interfaces which is DRother. They both stuck at 2-way state with each other they never reach the full state.
So in the quiz is saying that DR is activated on the Interface and we have 5 Routers included our Router. So we have our Router with DR and there are 4 Routers.
- one should be BDR 1x
- and the rest DRother. 3x
Total = 4x
So since DR or BDR perfrom adjcacencies with everyone so we have the Total of Routers = 4 Routers are going to be fully adjacent with our Router.
at minute 12:20 above he said:
'in the broadcast network type, routers will only form a full OSPF adjacency with the DR and BDR of the segment. '
He meant either possibility 1:
BDR and DRother are able to form adjacency with DR.
OR
DR and DRother are able to for adjacency with the BDR.
_____________________________
I tought at first time as well that DR is going to only perform with BDR.
I hope this could help because i misunderstood what he said as well.
since R1'G0/0 is DR it will make full adjacencies to its all neighbors (BDR and DRotherS )
mehn you're amazing. some good work
jeremy i hope you can also discuss about BGP :)
Amazing job!
Thank you :)
I am following this with a lot of passion from Uganda. very appreciative sir.
Is this the last video for CCNA
Thank you!
It's not the last, the course is about 60% finished at the moment, I'll release a new video every week.
This lecture would make Dijkstra jealous, keep up the great work!
Thank u Jeremy ❤️❤️❤️
Jeremy thank you so much , Iam studying your course man , great job, one love from Angola (África).
Thank you, Fernando :)
excellent teacher
To me, OSPF always looks messy and troublesome when seeing in a big picture. But you've divided it into well explained parts. Big thank you for all this lessons!
Thanks Miguel, I'm glad to hear that :) OSPF is an important part of the CCNA!
Thanks for the help
I always wondered how a router could establish more than 1 neighbour relationship on a link when using a broadcast network type, but I don't think I ever considered that routers might connect to one another using a switch, and now it makes total sense.
Thank you for your helpful lessons
Thanks for watching :)
Great teacher. Mistake on 19:47, the subnet for R1 is /30 so 255.255.255.252 not /24. Thanks for helping me understand these deep topics for the ccna
Thanks a lot Jeremy
Thanks for watching :)
thanks bro, good stuff!
Thanks :)
Thank you Jeremy Sir 🙏🙏🙏
Thanks for watching :)
Jeremy u r the bomb
thanks. I am waiting for videos with DNA Center, WLC &APs.
Wireless will be coming later in the course!
thank you for this great video :)
My pleasure :)
Thanks a lot for these high quality materials.
Question :
In which Ospf area all routes (external, local and inter-domain) exist in the routing table ?
Standard
Stub
totally stubby
Backbone
I think it's the backbone area
thanks a lot for your knowledge sharing.
Thank you for watching :)
Ccna is complicated but its worth of struggle little thanks For teaching us you deserve a Ferrari as a gift
thanks a lot Jeremy !!!
Thanks for watching, Youssef :)
Regarding Serial interface in cisco packet traces there is an separate DCE DTE Connection wire which we have only option to Select the router ifor DCE and DTE
Out of curiosity how many more videos do you have planned for this series? they have been an amazing help.
I think it will be a about 50 'day's in total.
Jeremy, I really appreciate for your efforts! You have a talent to bring up some not clear points in quite simple way. Thank you sir!
Thank you Alex, I'm glad to hear that :)
Any videos on Meraki fire wall and switches
Hello Jeremy on 23:02 you misspelled in the Broadcast OSPF Network Type BDR, you have written DBR, btw love u and ur content keep it up:)
this boson ex-sim-max question review comes with a a decent lecture ngl
Thanks
Hi Jeremy, just a quick confirmation. All OSPF adjacent routers are OSPF neighbors but all OSPF neighbors are not adjacent right. I mean, in the 192.168.2.0/29 subnet used in the video, the DR and BDR are OSPF neighbors and adjacent but the DROther routers are neighbors but not adjacent. Right?
Edit: Got this cleared from the explanation at the end. Precise and clear as always, Jeremy. Kudos 🙂
tysm
Everyone please watch ads and support. Love from India.❤️
Thank you Sakshi, I appreciate that :)
Yeeeees, finely, I was waiting for this video! Thank you so much, Jeremy!
Thanks Alyona :)
When you use the 'Default information originate' command on R4, will that automagically make that router the ASBR (if there is a default route to an external network)? Thanks for the series, it's awesome
Yep, because it's advertising destinations from outside of the OSPF network into it.
Thankyou
Thank you
Thanks for watching and leaving a comment :)
Hi Jeremy, in 27:08, if not mistaken, i remember the router id is same as loopback ip? why this router id is same as interface ip? and also there is different area configured also can active the ospf?
From Day 1 to Day 28.
Still Lot to go.
Hello Jeremy , as you lectured us many videos ago, the minimum size of an IP packet is 46 bytes. When you entered the IP mtu command , the range is from 68 to 1500. That means that the lowest value of the maximum transmission unit can be 68,69,70....... Up to 1500. Is that right?
how do you determine bdr? why was router 4 both interfaces dr?
very well explained, what would be the most common Clock rate use in real life serial links and encapsulation?
Not sure, I've never used a serial connection in my job. It's (almost) all fiber-optic these days.
42:52 if you attempt to change the priority on one of the routers interfaces, doesn't it loose its adjacency and all routers go down? was sure you showed that earlier in the video
Hello Jeremey, I have a question please it is not related directly to the CCNA but do you maybe know why at schools the teachers make the IT subjects complicated? I hope I can get an answer from a teacher himself. Thanks in forwarding for answering. AND 100000000000000000 thanks for the free series of CCNA.
Hi Jeremy,
Do I need to enter some kind of promo code for the two Boson software, or is it included already if I get both?
Thanks!
You don't need to enter a code, if you buy the kit that includes both it's cheaper than buying both separately.
HI Jeremy. While using the cisco packet tracer labs router ISR4331, every time i add additional ports NIM-ES2-4, I am unable to configure ip addresses to those extra ports. The system says error when I input ip address (ip) (mask). What could be issue ?
Hi!
I have a question. If R4 has packet for R1’s G1/0 int if this interface is down for some reason then R4 will not sent any packet to R1.
Then if R4 has packet for R1 via it’s loopback interface for G1/0 interface, but R1’s G1/0 interface is down already then what is the need to sent this packet if the destination interface is not UP?
at 19:50 i believe the subnet mask for each should be 255.255.255.252?
Hi Jeremy. Can you advise me what CCNA book should that matches with your videos?
I don't think there are any books that match my videos, but I like Wendell Odom's books.
Hi Jeremy:
@ 9:43 : if OSPF interface priority = 0, can we say router will not participate in DR/BDR election only on that interface /subnet or it will have global effect ?
Just that interface, the OSPF priority setting is local to the interface you configure it on.
So how can we make R2 become the DR after changing its ospf priority withlout clearing the ospf process on a live network?
Thank you so much, Jeremy. I have one question, on the requirement to be neighbors it is stated that the interfaces should be in the same subnet but the routers in the diagram like R1 and R4 or R5 are not in the same subnet but share the same LSDB. Can you explain this? Thank you again for your kindness.
R1 and R4/R5 aren't OSPF neighbors, so no need to be in the same subnet. R1's only OSPF neighbor is R2.
Great video as always. Thank you so much for your outstanding course!! Question, I do not see the lab on your download page, I do see and retrieved the flash cards. Is the PT file not uploaded to your download site? Thank you again for the great resource you are providing.
Hi Bill, the lab and flash card files are all in the same google drive.
@@JeremysITLab
Hi Jeremy, I see the flashcards and have downloaded them for the Day 28 OSPF part 3, But I do not see the PT file for OSPF 3 day 28. I only see the PT files for part 1 and 2.
@@billpalmer1729 It's next weeks video.
what is the only mismatched configuration between two routers that will allow them to establish a two-way neighbor relationship, but fails to exchange LSDBs ?
Hello Jeremy..
Nice video..
i'm new on networking, i'm planning to add a new cisco 2960x on existing stacks. The switch i will add is not new. Do i need to reset it to factory default before i add to the stack?i know this is out of the topic.i appreciate your help.thanks..
I'm not sure if it's needed, but I'd factory reset it first to be safe. Better to search through Cisco documentation for a proper answer.
To Be Honest, Reading JCNP - Level Channel Members Was Very Cute And Originally! You Should Do This Again, Stay Originally - Be Unique!
I already recorded the next few videos without reading all of the names, but okay I'll start doing it again ;)