OSPF Neighbor Adjacency States: DOWN ATTEMPT INIT 2-WAY EXSTART EXCHANGE LOADING FULL

[@PracticalNetworking]

📌 *More free preview lessons from the Practical OSPF course:* pracnet.net/ospf 📌 *Want even more? Check out the full course:* pracnet.net/ospfcourse 📌 *CCNA Resources:* pracnet.net/ccna 📌 *Learn Networking:* pracnet.net/nf 📌 *Learn & Practice Subnetting:* subnetipv4.com

[@rashidselemani475]

Even a new born can understand what you teach, you make every concept. Thanks Sir

[@soulofkerala24]

Easy to understand the concepts; this entire OSPF series really helps !

[@donaldtong2903]

I thought I know ospf... Now after watching these series... make thing so cleare! Best ospf video by far !

[@stripling20]

No one can explain better than you did. Thank you so much

[@arshdeep1286]

Thanks for your valuable teaching

[@karanvyas5155]

Awesome sir, thank you so much...worth more than my expensive college fees

[@PracticalNetworking]

;) Should I offer a "Practical Networking" degree? ;)

[@megaskater815]

Aint that the truth!

[@Networkguy-mf2xh]

One of the best OSPF presentations. Very good commands of how the protocol works in general. Keep doing the same :)

[@PracticalNetworking]

Thank you =)

[@simbarashemakomichi6776]

You are a Genius bro.

[@j.o6885]

Here for the algorithm,I wanna thank you for making this,and I'll see you in the next one.❤

[@PracticalNetworking]

Ha, you're comment made me chuckle. =) Thanks for your help w/ the algorithm. Cheers !

[@iamjoycheee]

I am close to taking my CCNA, and I am glad i searched through all over youtube about OSPF topic, just like the subnetting this by far is the most "Practical" networking lesson I found, I had watched Neil Anderson, Jeremy's IT, Keith, Cert bros, etc I also read the Cisco official cert book but these are the only videos that nailed it to my brain so far. Thank you Sir.

[@afifbitar4608]

Excellent breakdown

[@brijendrapsingh]

you are excellent bro.. putting lots of efforts...

[@PracticalNetworking]

Thank you for the kind words.

[@madusankasampathweerasingh8570]

Superb explanation!

[@ashu-oh1bb]

Awesome. Very Helpful. Short and Sweet !! I also went to FULL State.

[@learningchannel274]

I swear to gods, I would pay good money to become your one-on-one student. Thank you so much for this. Sending positive energy your way my friend.

[@laminceesay1435]

Excellent job explaining the processes... Thanks

[@abdullahfaisal1653]

Thank you for your effort in making these videos

[@willianbarreiro9925]

Hello teacher, thank you for this content. I'm enjoying a lot my journey to study to take my CCNA, I confess that is not easy but it's not impossible either.

[@zvonimirlevacic1531]

Great explanation, thanks!

[@PracticalNetworking]

You're welcome, Zvonimir!

[@shahadatanwar4109]

Was waiting for this video. Thanks log again

[@PracticalNetworking]

=)

[@sayan.rahman]

The content is o rich. I watched the video and helped me a great deal. thanks you are awesome

[@vladislavkaras491]

That was a way better explanation than Cisco. Thanks for the video!

[@nandeux8009]

Excellent content, clear explanations, apart from technical knowledge, a great virtue for teaching 👏👏

[@PracticalNetworking]

Hi Nandeux, thank you for supporting the channel. Glad you have enjoyed the OSPF video series =). Thank you for the kind words.

[@syedsarwarhussain7316]

Thanks brother for your videos and preparing for ENCOR.

[@matthewcardinal4186]

You are an amazing teacher - if you offered an in-person course I would pay thousands for it.

[@fayasamd5204]

literally the best ospf lesson i ever seen till now, thanks i wanted to refresh my knowledge and your videos are the best, i wish i learned from your videos from the start so easy to understand.. thank you so much :)

[@rickwiers1905]

This series is enormously helpful!

[@keenkeen5863]

you are the best, thank you

[@juliusphung]

Thanks for great video about OSPF ! The best study material so far I have ever found ! Already recommended to many of my friends. Brs !

[@Alien-Networking]

Thank you so much for the formal teaching ❤

[@PracticalNetworking]

You're welcome !

[@abhinavp9957]

Great clear simple

[@PracticalNetworking]

Thank you =)

[@aminelfeky]

Love your videos Ed. Your content and your approach to teaching is amazingly unique. Would love a BGP deep dive series

[@charlesikpeme7777]

Great lesson!

[@PracticalNetworking]

[@subee128]

Thank you very much 🙏🏻

[@claudiusdsouza2379]

Very well explained.

[@rocdiva530]

Wonderful! Your Oreilly content is excellent as well

[@wwolfram33]

Excellent!

[@PaulCherepnin]

You're doing great and very useful job of preparing such good quality materials! Thanks a lot!

[@philipsheaff]

Well done 👍 thanks for the breakdown

[@ahmed.benaros]

appreciated hard work 👏💯

[@Apnakitchen.cuisine]

Yes. So understanding video. Super cool.

[@RyuJin-ur6cf]

Great content! your explanations are so clear. Thank you for this

[@PracticalNetworking]

You're welcome, Ryu!

[@priya34101]

thank you ED

[@PracticalNetworking]

You're welcome, Priya

[@saajkmk]

Excellent Sir.. greate explanation...

[@CasablancaConfidential]

Thank you very much

[@PracticalNetworking]

Thank you for supporting the channel. Glad you enjoyed the content =)

[@masoudghorbani8023]

Thanks for the great & valuable content!

[@PracticalNetworking]

Cheers, Masoud =). Glad you enjoyed it!

[@gatty.]

Fantastic!! On point, best explanation!

[@PracticalNetworking]

Thanks, Gatty. Hope you enjoy the rest of the OSPF videos as well: kzbin.info/aero/PLIFyRwBY_4bSkwy0-im5ERL-_CeBxEdx3

[@ElnurHuseynov-zo2ee]

Thank you so much.

[@vijay85cisco]

have seen video of you with david bombal ; it s good and thanks for the info

[@PracticalNetworking]

Mon Ami! Is that "My friend" in French? In any case, glad you found the channel. Welcome!

[@vijay85cisco]

​@@PracticalNetworking huhaa its just username which is in French. But really iam Tamil. with you Bombal session abt TLS indeed good video and seen ur free of two TLS playlist modules on your channel which i got more into that and likely first week of next month, i will go with your full Course. Believe it should enhance my knowledge abt TLS. Thks

[@ZoltanSzaszBenedek]

Really good ! ❤

[@joshuameaders8053]

your awesome man, thank you

[@Don-Carillo]

👏 . Learnt a lot , cheers Ed 🍻

[@PracticalNetworking]

Thanks Don. Cheers!

[@HD-bc6ul]

Thank you

[@PracticalNetworking]

You're welcome!

[@surendras5853]

Thanks Ed!!

[@rayapanenihemanth3006]

Brooo i loved your presentation and way of explanation and it's awesome really thank you veryyy muchh. Can you please explain us for BGP also we really need your support.

[@tungangvan9467]

cảm ơn anh

[@PracticalNetworking]

You're welcome =)

[@mehrdadahmadi585]

Amazing

[@PracticalNetworking]

👍👍

[@rasheed9192]

you are a great lecturer. can you please make an series for EIGRP and BGP

[@PracticalNetworking]

Glad you enjoyed these, Rasheed. For EIGRP, check out these articles: www.practicalnetworking.net/stand-alone/eigrp-terminology/ www.practicalnetworking.net/stand-alone/eigrp-metric/ www.practicalnetworking.net/stand-alone/eigrp-feasibility-condition/

[@ifeelkiing]

Holy moly!

good stuff, thanks!

[@PracticalNetworking]

You're welcome, Carlos.

[@RaphaelKONG]

Awesome contents really ! I have some questions so: When does the router learn about the IP of the peer (seen in neighbor table) ? I dont properly get the DBD packets exchange in the EXSTATE neither : these DBD packet are unicast or still multicast ? Thx a lot !👍

[@subhojitpal8858]

Great Videos to learn OSPF in a simple way..

[@rapnetwork4170]

Hi Sir. Thank you so much for the great tutorials. I'm currently on my CCNP journey and these video series helped a lot. Again Thank you very much. May I also ask if EIGRP videos will take place in the near future.

[@PracticalNetworking]

Videos? Probably not. But I did publish some EIGRP articles if that is of interest to you: EIGRP Explained : www.practicalnetworking.net/stand-alone/eigrp-terminology/ EIGRP Metric : www.practicalnetworking.net/stand-alone/eigrp-metric/ EIGRP Feasibility Condition: www.practicalnetworking.net/stand-alone/eigrp-feasibility-condition/ Glad you've enjoyed the OSPF videos =) Good luck with your CCNP!

[@rapnetwork4170]

@@PracticalNetworking Thank you very much sir. I will look into this. =)

[@prashantshinde5318]

please start BGP

[@88skewer]

so from the chart and example that you show, the slave will reach full state first than the master reach full state later ?

[@PracticalNetworking]

Not necessarily... not every time at least. Consider if the master has more routes it learned from the slave, it will take longer to "load" them into the LSDB, and therefore will be later to reach the "Full" state. But it could easily have gone the other way around.

[@leetanizer]

Hello and once again thanks for the amazing work. I have a small question though, does the Master/Slave election only maters inside the ExStart and Exchange states ? or does it dictate who start the "LSR-LSU-LSAck" process in the Loading state? many thanks

[@The--J0ker]

At 10.16 why does slave send an empty DBD to master what is purpose of an empty dbd؟

[@PracticalNetworking]

To confirm reception of the master's DBD.

[@adedejiemmanuel1]

Hi Ed, At the 2-Way State, will the routers be negotiating (auto) or they are simply comparing configurations (as set by the administrator) to ensure adjacency?

[@PracticalNetworking]

Great question. It's more simply comparing items in the Hello packets. If there is a mismatch, the adjacency fails. There isn't a "negotiation", more like an "ultimatum". (if I misunderstood your Q, please feel free to ask again!)

[@adedejiemmanuel1]

@@PracticalNetworking Thanks

[@medosasa4580]

Hello, distinguished teacher... I want to ask about the empty DBD package that the master and slave exchange during the exchange stage... Do we consider it as an acknowledgment from them of receiving the database summary??.... And is the concept of master and slave the same concept the DR & DR Other??

[@PracticalNetworking]

Yes, the DBD packets form a system of acknowledgement. No, they are different than the DR/BDR, see Lesson 6 for info on the DR/BDR. The Master/Slave are only a component of syncing databases, they don't really serve a purpose outside of that.

[@ali-07]

Well done Me:youtube mechanism this channel is worth showing more, can you hear ? Haha

[@PracticalNetworking]

You tell 'em, Ali ;)

[@Niggro07]

Comment

[@PracticalNetworking]

[@hhhhhh7406]

Thank you

[@PracticalNetworking]

You're welcome.

[@PKJamal-b5q]

Thank you so much

[@basixs8330]

waiting for more vidoes...Thank You

[@PracticalNetworking]

Whole series is available here: pracnet.net/ospf

[@montassirben8560]

thank you

[@ershadramezani6716]

Fantastic OSPF tutorial! As always it was incredibly informative and the explanations were crystal clear. Really appreciate you sharing this with us!

[@PracticalNetworking]

Thanks for the kind words =)

[@waverache8296]

You are changing my life

[@malexherron]

thank you for your passion and hard work, it's clear you are giving your all to create a robust community here. you're doing a great job, and i sincerely hope it bears fruit for you.

[@PracticalNetworking]

Thank you for the kind note and recognizing the effort to create these videos. I appreciate your well wishes. =)

[@lifeisbeautiful7882]

very perfectly explained.Thanks

[@PracticalNetworking]

Cheers =).

[@tiagonovembre5465]

Very helpful material. thanks for sharing it.

[@PracticalNetworking]

Cheers, Tiago. Glad you are enjoying the OSPF series =)

[@israelcervantes6062]

Very well explained.. makes it so easy to relate and forming a general idea

[@PracticalNetworking]

Thank you. =)

[@girishakkili]

❤❤

[@flyboyrj360501]

Thanks for so good explanation.

[@PracticalNetworking]

You're very welcome =)

[@r_c_h_d7409]

fabulous explanations. great linear progression in networking understanding. keep up the good work.

[@PracticalNetworking]

Glad you've enjoyed these, RCHD. Thank you for the kind words. =)

[@sergioalcantar3290]

Excellent

[@CyclingAndRunning]

Absolutely phenominal explanation with details

[@kandapahala]

wow Great, Thanks

[@PracticalNetworking]

You're welcome, Gihan.

[@majiddehbi9186]

you great teach why don't u addd BGP, EIGRP, distibution and filtre

[@jacklowe1676]

No bull I love it !!! When you are studying for the CCNA, especially if you are just getting into IT from another career, you don't need all of the unnecessary stuff found in other material. I love that this is down to the bone. Great job, I am planning on purchasing your full course. I have been through at least two full paid courses before finding your material and I wish I could take back the hours of pulling my hair out figuring this stuff out because the other courses glossed over things or did not explain them to a depth that I felt I needed. If I ever get to the point of mentoring someone I will send them here first thing. I would love to see a specific CCNA course that actually follows the Cisco Blueprint step by step. A lot of courses try but I think you could do a better job. keep it up!

[@827jimenez]

To echo the well deserved praise you've received from others, you're truly the best Network instructor out there! I've also paid for multiple courses on CCNA but I came cross your youtube when I was trying to get a better grasp on subnetting and your series there really helped me better understand it. I continued my other courses but then found you cover many of the CCNA topics individually, you really help nail things down! I was starting to think this just wasn't for me when I got to the Dynamic Routing Protocols area, but you've really pulled me through. I'm planning on sitting for the exam in the next 2 months, but if you ever developed a structured CCNA or CCNP course, I'd gladly pay for it. Thank you very much for all your work!

[@PracticalNetworking]

I know this is late, but I still wanted to drop a note of appreciation at your kind post. I'm so happy you found my content helpful and it helped push you along in your CCNA & CCNP journey. I hope you were able to pass on your first go! I think about making a full CCNA course pretty frequently, but at this point other projects are taking priority. I'm planning on expanding my Networking series into a full fledged fender agnostic networking course. ANd maybe following that I can branch off into the specific vender certifications. In any case, thanks for the kind note =) GOod luck with your certification goals.

[@mattshen1207]

Cfbr

[@PracticalNetworking]

Thank you again =)

[@vivekprakash6901]

nice video sir thanks for giving me the information of the ospf sir you explained ospf in the nice way

[@godkarthus9510]

Practical Networking you are my master

[@dmitriigoltcov5798]

Great explanation of such a difficult topic!

[@mostaphasaid7250]

really thank you a lot, you are awesome, god bless you

[@rohanofelvenpower5566]

this series is very educational and sexum

[@parheliaa]

Nice You could mention (even though DR/BDR are not explained in detail) that *2Way* state is correct with non-DR routers, so not 100% relations are expected to be *Full*

[@PracticalNetworking]

Funny you should mention it. I just finished the video which focuses on DR/BDR and the 2-WAY/Drother adjacency state is directly covered =). Hoping to release the next set of OSPF videos in the next few weeks. Find me on Discord if you want to preview that video =), I can set something up.

[@antvad1313]

Awesome explanation! Keep it up!

[@محمدجابر-غ1ن6خ]

thank you that was really helpful