OSPF (Open Shortest Path First) | Cisco CCNA 200-301
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- เผยแพร่เมื่อ 1 มิ.ย. 2024
- Free TH-cam Playlists from Keith:
Master Playlist for Cisco CCNA 200-301 ogit.online/sloth
Cisco CCNA 200-301 Security ogit.online/200-301_Security
Cisco CCNA 200-301 IPv4 Subnetting ogit.online/subnet
And…
Keith’s Content at CBT Nuggets ogit.online/Keith-CBT
Its never boring hearing an engineer talking about this stuff which that passion! Thank you for your videos!
Thank you @wagnermas10!
Wow, 7 kids? I think Keith has an entirely different definition of penetration testing - nice work man !
I truly enjoy these videos, even though i know this stuff already by heart. But i am always fascinated by the simplicity with which Keith can explain even the most complicated technologies and his enthusiasm. One can hear and see how much he enjoys his work, if you can even call it work in his case, it looks more like pure pleasure.
Thank you for the comments! Glad you are here.
@@KeithBarker hi keith i really love your videos but can you tell me are your videos enough to pass the new ccna or i should read some books as well?
@@brianconner1212 can you recommend me some?
I was born in 64 too. YOU ARE NOT OLD!!!
i gotta say, i keep getting discouraged with this networking path every time i stumble on a subject or get a trash score on a practice test, but seeing your dedication and passion in this keeps me motivated.
extremely good at breaking subjects down into easily understood pieces; i feel like one could even get a better grip on how to teach people simply by watching you.
thanks a ton for going through the effort of putting this content together.
EDIT: I ended up successfully passing my CCNA, in big part because of your content. Thank you a ton. I will almost certainly be referencing back to this stuff as I get my bearings. The fact that you put this stuff up for free is a blessing, and you're awesome for it. thank you.
Congratulations The Lurrax❗
So great to hear, way to get it done. Best wishes on your continued success.
Just came across your channel. Man you are great. Not boring, sense of humor, kept me engaged, able to break down. Definitely subscribing!!!
Awesome! Thank you Andrea. Glad to have you as part of the community. Looking forward to learning together.
I personally found my afternoon and evening teacher. You are the best!!!!!!!!!!!!!!LOVE YOU LOADS
Omgosh Keith!! I watched that vid on Cisco before I found you! And I absolutely loved that instructor!! Haha, I was looking for that instructor on youtube and I was sad that he did not have anymore vids. I cannot believe that instructor was you!! The awesome character is you but, you look so much younger now.
For the record, you look even better now than 10 years ago!
I really like this guy.. The way he's is explaining the concert he literally enjoys that.. I also love the things he share about his beautiful family.. Very amazing guy
Thank you Puru Paneri!
Thanks Keith. You are my favorite teacher I have come across.
Can't find enough words to thank you keith..
3 years since i watched the first network video by you , and so far i consider every second spend in viewing ur videos is totally worth it.
Thanks a lot.
Thank you for the very kind comments! Glad you are here Ali.
Lol it’s adorable how much fun you have explaining and thinking about this stuff. Definitely makes it more enjoyable to consume than other vids I’ve seen.
Glad you enjoy it!
Thanks @keith, you are a amazing instructor! The video that you show about you 10 years ago was the first video that I watch of you!
Thanks again!
Wow, thanks!
Proof learning can be very engaging! I'm happy you and the folks at CBT Nuggets have teaching styles like this. I very much hope I get to work with someone who has a similar passion for the subject
I hope so too!
Keith, this Waoo and waoo, thank you so much for the great job done. I enjoy more seeing your laughter and sense of humour , You made me to love and enjoy the teaching . Thank you so much Keith
Thank you Tobby!
Omg you were looking totally changed 10 years back. First time i watched ur video it was super amazing i like the way you explained OSPF. Really appreciate.
Thank you so much!!
Thanks for the video!! Just converted my GNS3 ICND1 RIP lab over to OSPF. Looking forward to subscribing to the CBT next month to begin my CCNA 200-301 journey.
Welcome aboard!
Thanks for the video! I love your enthusiasm,tbh. It always makes me enjoy learning a bit more.
Thanks for watching!
great video about OSPF. i love this channel for studying my CCNA 200-301 cert.
Great to hear!
Thank you for making this so much simple than reading it on CNNA I am more visual learner.
You're very welcome!
Thank you so much...... I went through VPN basic courses and amazed how said complicated staff can be explained so easily. gained alot
Great to hear!
OMG, the throwback to that old video. . . I watched some of those videos and had no idea that was even you! I felt the teaching style was familiar, but I could not put my finger on it. hahaha
Welcome back!
thank you, Kith, after I watched your video I have gotten my CCNA certificate. You are the hero in my heart.
Wow, awesome work! Thank you.
Sir, I have been seeing you since I don't know when :).... you are a LEGEND!!!
Thank you! Glad you are here.
Like a good wine Keith you get better with age!
Very very knowledgeable insight from 34:10 to 37:25 on summary of DEVNET in less than 5 mins. gave enough information on DEVNET. Thank you Sir.
Glad it was helpful!
I have learnt ccsa R80 course from your video, completed CCNA certification. I have learnt lots of thing in networking from your videos. Thanks a lot sir.
Glad to hear that
I just came across your video and you make the learning fun......I have been working in IT since mainframe days, the early days if Silicon valley 80-81....thanks for this. i have a OSPF/EIGRP and RIPv2 network in packet trace working with route distribution.....
Wonderful!
30:25 when u have many good ideas in the head back to back this happens. love your content
Thank you Vladislav Catimba!
Really love your videos. Helping me prepare for CCNA in the future (in 3rd class of 3 at CSN now). LV resident for 14 years - hope to meet you once Covid is sufficiently under control to allow for safe gatherings. Again, thank you. Owe you a beer (or 2) at the very least.
Thank you Jason England! Would love to meet up. Cheers.
Thanks for putting so much info out here for free. Top job
Always feel welcomed here! great attitidue sir and keep on going! :) merry christmas, happy new years, happy holidays!
Thank you Keith, really appreciate what you've been doing
Thank you! I appreciate you being here, and for the kind words. See you in the next video!
Amazing stuff. I cant see it live because you are streaming in the middle the night, but even watching the reply is a great way to spend an hour
Thank you for the comments! Glad you are here.
You make it easy to understand. Thank you very much.
Glad it helped!
My goodness, why can’t you be my lecturer. Make this so simple to understand, even with ADHD. Thank you so much Keith super appreciated:)
Thank you Joe Pearson!
Thanks, Keith. Great video. Learnt a lot. 😊
Thank you Aaron Teh!
You are awesome keith , you and jermey are some real character
Thank you for the comments! Glad you are here.
You know Keith you look much younger than how you were looking 10 years ago. It is weird but I think it is true. And yeah you are fantastic!! I passed my CCNA because of you.
Thank you Arkajit Banerjee! Congrats on that CCNA, and thank you for the kind words. Much appreciated.
I like the way you explane things !!!!!!!!
Thank you for the comments! Glad you are here.
I do really appreciate this amazing tutorial video, keep the same person as u are teacher... Congratulation.. I wrote from Angola.
Thank you Manuel Cruz!
champion effort mate,, gonna have to buy u a cold beer if i ever get out of Australia with the world the way it is
Thank you Chris! This pandemic won't last forever. Would love to take you up on that some day. Same for you, next time you are in Vegas.
Cheers.
Thank you so much for this video.
Happy to do them Felix! Glad you are here.
God blessed us with such a super source of knowledge bank to survive in Tech. World. Super saviour. 👍👍🙏
So nice of you
when I start watching your videos it is very difficult for me to pause or stop them. You simplify complex things Keith. I will definitely pass my ccna with first attempt.
Way to commit to your goal owen vukomba❗ You can do this.
I am here because I still can't wrap my head around OSPF.
Thank you Keith. DHCP snooping next please
Thank you, and yes! That is our next topic. See you there.
Great stream Keith. I'm looking forward to watching the DHCP snooping video, same Bat-time, same Bat Channel 😁
Holy DORA batman! Thanks for the comment Kevin. I appreciate your participation and support. You rock.
Thanks for the content
My pleasure!
wel done keith
regards
Lotfi abbas
Thank you for the comments! Glad you are here.
Keith. You are the best
Thank you James Carl Diez! Glad you are here.
omg that video was funny at your expense , ty for sharing
Thanks For Watching!!!!
Going back to watch all 4 of your videos on OSPF! I just completed this entire OSPF section in the new CCNA course you did, so much stuff to mentally digest, oh boy. However, I think I need clarity in understanding a few things better and I think it's just better to watch all 4 the videos you have on OSPF specifically in order entirely. I also had a really hard time trying to understand "loopback Addresses" and what's the point of them. I'm thinking it seems like an ID, yet it seems all fuzzy to me the whole thing. I figure, just go over all 4 your vids.
Thank you! Catching up on comments today.
Thanks Keith.
Thanks Keith.
Thanks Keith.
Go to 1st Line.
Happy to do it, thanks for the feedback Ramzi Bakuka.
Hey sir i wanna thank to you I have got Networking job just to see your youTube video
I was nit have the enough money to buy your course on CBT nuggets that time.
But now I'm saving money just to buy you CCNP course on CBT_NUGGETS.
Thank a lot for giving me the best way....
Congratulations Deepak Aslia❗
So great to hear, way to get it done. Best wishes on your continued success.
Hey Keith! Got a question i been working with ipv6 ospf inside packet tracer and i have neighbor relationships between all my routers but on some routers have no ospf learn routes. Thus they are unable to send packets across my network. Isn't weird that they have a relationship but they are not sharing routes or LSAs? Could this be a packet tracer error or am i missing something? All my interfaces are up and for references my network is setup exactly like your TCP/IP IPv6 class on CBT nuggets video 10.
Keith , do you have to create a router id , when configuring OSPF , on your example you didn't do it , or is it an optional command . thanks
Thank you for the question Manuel. The OSPF routing process needs an ID.
When the process is started, here are the 3 options it has, in order of preference, to select a router ID.
1 a configured router ID in the router process of ospf
2 a loopback interface that has an IPv4 address on it, when ospf starts
3 a normal (non-loopback) interface that has an IPv4 address on it, when ospf starts
So in short, if I didn't specify and OSPF router ID, it would then use option 2, and if there weren't any loopbacks, it would use option 3.
Hope that helps, and thank you for watching.
Thanks Keith for the answer , this makes more sense to me now .
Hi, Keith, it is an honor
hi all
Thank you for the comments! Glad you are here.
Hello @Keith Can you explain the OSPF packet types and neighboring states from init to Full, These are the things which got overlooked by me while studying it and I really want to know it. Thank you for the answer in advanced.
Thank you for the request. Here it is... ogit.online/OSPF_Neighbor_States
Hello Mr Kheith
I can’t find words to thank u. I’m watching your video for about 5 years. thanks to u and to God , I’m CCNP Routing and Switching.
Now I’m working as a networking Engineer and your design is seemly like my topology. But rather than using a routers to access internet I’ll use Cisco ASA in front.I’m not so good with firewalls.
My question is :
It’s will be possible to these Firewalls (active/active) to participate in ospf process and each Firewall will be active to some subnets et standby for the other subnets.
In my opinion the implementation will be standalone with the same configuration.
Thanks
www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/91336-pix-activeactive-config.html
There are some challenges with multiple contexts (used with Active Active) and OSPF. The above link may provide some guidance on that. Hope it helps.
Keith Barker @ thanks a lot
Hi Keith. I didn't find other routing protocols in your master playlist. Am I wrong or you didn't have any video on EIGRP, IS-IS, BGP and RIP? thanks in advance for your answer.
Anyway, you can expand and explain what exactly the "Process ID" is? I didn't quite properly understand "Area" from the CCNA course, but you covered it well here at the beginning and at the end also answering someone else's question both so it helped. As well I picked up a few things I missed as well, so was very helpful.
Thank you for the question. Let's imagine you wanted to open a browser app on your phone. Then a moment later you wanted to open another instance of that same browser. (Have 2 copies (2 processes) running at the same time, not just multiple tabs in one of them). To do that, your phone would need some way of keeping those apps (processes) separately, such as thinking of them as 1 and 2, or A and B. The router is the same way. If OSPF is running on the router, like an app running on the phone, the router keeps track of this app (this OSPF process) via a process ID. It is required to have one. This way, if we ever need to run a second copy of OSPF, it will have a separate process ID, and the router can keep track of them individually.
For CCNA you will never need to run a second instance of OSPF at the same time, but the process ID is still required for OSPF even if you are running only 1 instance (copy) of it on the router.
Let me know if that helps. :)
-Keith
Keith Barker This expanded explanation helps a bit. And since I have 14 browsers open on my phone I can understand that point well. I also found a recent video by David Bombal that gave an interesting point of view on Loopbacks also. Some of it clearly went over my heard being beyond my understanding, but I understood some of it that it also helps after watching it 3-4 times. It was this one: th-cam.com/video/pZho6OQYYxI/w-d-xo.html
@@ardentdfender4116 Did you get a chance to watch the video on "block size". It has examples and explanations for loopbacks, that I included just for you.
@Keith Barker I’m not sure as yet what a Block Size even is. If you can link it, I’d surely look at it. Unless I can exactly determine just which video that is.
Added question. Is OSPF available on a L3 Switch? In that since a L3 Switch operates very much just like a regular Router, is a L3 Switch also capable of OSPF?
Ardent Dfender th-cam.com/video/c_D1VaktOxI/w-d-xo.html
Best of Keith is @ 34:09. Watch one of the best sight of Keith..👌
Thank you Gaurav Desai
How is it possible to form an adjacency over different ospf process-id e.g in the same router process id 1 and also process id 2. Thank you.
Thank you José Andrés López!
A router can run multiple instances of OSPF, just like a smart phone can run multiple apps.
Most of the time, routers only need to run a single instance of OSPF.
The process ID is how the local router tracks that instance of OSPF.
Because the process ID is locally significant, it does NOT have to match the process ID of another router.
This is different than EIGRP, where the Autonomous System number on both routers need to match in order for them to become EIGRP neighbors.
Feel free to join my Discord sever. Lots of people there helping each other out. Each Saturday at 10am Pacific I hold my "Office Hour" where learners can ask questions about the topics they are studying. Mostly focusing on Cisco CCNA 200-301 topics. Feel free to join us there live if you are available. Here is the link ogit.online/Join_OGIT_on_Discord
Thanks again José Andrés López!
This was the hardest topic in the book
Keith are you making a course of CCNA in live or just we can buy a already recorded videos from you?
Sir in ospf at least one area should be there for forming adjacency right?
Without area ospf will not work right?
Area 0 is backbone area, I know that. If suppose two router's are there both interfaces facing each other in( area 0 or area 1) it will become neighbors right.
Without area there is no concept of ospf.
I asking these questions because one interviewer asked me 'without area is ospf will work or not'?
Thank you Sreejith.
Imagine two routers, connected to the same network segment (same VLAN, IP network).
They must agree regarding that common network, which area that network is assigned to. If they don't agree, they won't become neighbors.
Here is a short list of what much match to become neighbors, they must agree on:
IP network/mask
- Area #
- Timers
- Whether or not a DR is going to be used. (Broadcast and Non-Broadcast OSPF network types are the only two that expect to use a DR on the segment).
Authentication (if it is used or not, and if so what type, and if so what password is used)
OSPF requires an area. In a single area, that area should be area 0 or sometimes 0.0.0.0 (both mean area 0)
If there is a single area, and a different number is used, such as area 9, it will still function (this is not best practice, and rarely done other than a test or demonstration).
Thanks for the questions, and best wishes to you!
@@KeithBarker Thanks. Lots of love
OSPF Implementation question, best practice?
L3 switch with a bunch of SVI's and couple of OSPF Neighbors via L3 switch port on the same switch. With use of proper passive and active interface commands under the OSPF router process to prevent the SVI from joining the OSPF neighborship process, is it better and or cleaner to use the network statements or go to each SVI and Interface and use the "ip ospf process area" command to include the associated network in the advertisements?
basically
ip ospf 1
network 10.10.10.0 0.0.0.255 area 0
vs.
interface vlan 100
ip ospf 1 area 0
Thank you for the question Michael Atchinson. If doing it manually one factor is time. If there are dozens of interfaces, more work would be needed compared to network statements.
If it is only a few interfaces that will be running OSPF, the interface configuration option works great.
Keith I have a serious question. Is it possible for a handicapped person to find a career in networking? Are there non-physical positions in the field?
You know what sir, when you disclosed you've got 7 kids, I said to myself "oh boy, now I know our networking master is still young, energetic and venomous!". No offense, sir. Peace.
Great
Thank you SanDiegoSalesAcademy.com!
BTW... how to change MTputty secreen color to green and black?
Keith is there a walkthrough video on any of these labs?
1. 2020-06-18 OSPF and TShoot
2. OGIT-2020-07-17 PT Lab More OSPF and Tsh
Thank you Arsen Mkrtchyan. Feel free to join my Discord sever. Lots of people there helping each other out. Each Saturday at 10am Pacific I hold my "Office Hour" where learners can ask questions about the topics they are studying. Mostly focusing on Cisco CCNA 200-301 topics. Feel free to join us there live if you are available. Here is the link ogit.online/Join_OGIT_on_Discord
Thanks again Arsen Mkrtchyan!
@@KeithBarker I will 100%
So he said the full video of the ccna 201 300 be released in december?
Yes. CBT Nuggets will be releasing both the new CCNA and DevNet content in Dec 2019.
@@KeithBarker Awsome thanks. I cant wait to waych the new ccna videos.
Got a sub from me! Great resource!
Welcome aboard!
how do i get those those video content on 4.06?
A because they're all prime numbers.
Does anybody know what's the name of the music track playing in the start of this video?
you should do IPV6 static routes in packet tracer haha
Made me smile! Thanks for being here Edwin.
Puddles shirt is cool.
Thank you Preet S! I've seen him a couple times, he is fantastic.
shout out keith 😁😁😁
Hello Feljun Tano!
I m a freelance tax consultant by profession, wanna dive in into networking.
Which will be the perfect point to enter??
Network + >> CCNA 201 300
OR
CCNA 201 300 ( directly ).
Thank you for the question Gaurav. If you are brand new to networking, the CompTIA Network+ is a nice gradual introduction from a vendor neutral perspective. Then, the CCNA will use a lot of that knowledge and build on that with specifics to Cisco.
Either way, enjoy the journey and enjoy the videos here on TH-cam. ogit.online/sloth
Hi Keith, I am creating a site to help people train for the CCNP/CCIE 350-401 exam and I want to put a link to this video as a reference. Is that OK? I am new at doing this, so I don't know if I am crossing any copy rights red line or whatever, the internet is crazy these days. I want to also put Cisco's OSPF Configuration website and stuff like that. Thanks for your help.
Thank you for the question, and yes. A link to the video is fine. There are several videos in my CCNA 200-301 playlist that address OSPF. The full playlist is here ogit.online/sloth
Enjoy, and thanks for asking!
Hi Keith it's not CCNA related but would love to see a video on ISIS
Thank you for the idea.
so there is no ospf multi area in actual ccna?
DHCP Snooping! because for the life of me adding the three commands (two in global and one on the trusted port) will not work for me!
Thank you for the comments! Glad you are here.
That sloth just watches you the whole time
Thank you, we may be co-dependent. ☺
DHCP Snooping for me
You got it!
DHCP Snooping because of security
Thank you for the comments! Glad you are here.
Would love for you to do youtube content on ethical hacking Keith
Thank you Scott for the suggestion. Currently I am focusing most of my TH-cam content at the Cisco CCNA level, but will keep your suggestion in the queue as a possibility in the future. Thanks again for the idea.
V6 static routing
Thank you for the comments! We will leave IPv6 static routing on the list, and will get to it in the near future.
IPv6 Static Routing
We'll save that one for a future stream, but it is still on my list! Thank you for the comment, and see you in a future stream or video.
Ospf is good
DHCP Snooping sir. Thanks.
Perfect! That is the majority vote, and that is what we will do on 11/27. Glad you are here.
DHCP Snooping pls
Thank you for the vote, and yes! See you in the next stream.
No Neighbours because they didn't paint the fence
Thank you Dave Dawn! 😆
IPv6 routing
That is still on my list. Will get to that in a few streams from now. I am glad you are here Edwin.
@@KeithBarker Love this new series, and would also like to see IPv6 subnetting; thanks for your great work.
Using Packet Tracer...
Thank you for the vote! Glad you are here. Based on the majority input, we will focus on DHCP Snooping next Wednesday. Packet Tracer is still on my list though! Thank you.
Keith reversed age 🤣