Intermediate System to Intermediate System (IS-IS) Routing Protocol Fundamentals

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7 жыл бұрын

Intermediate System to Intermediate System (IS-IS) Routing Protocol Fundamentals
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A very scalable, fast converging, link-state routing protocol that often gets overlooked is “Intermediate System to Intermediate System,” or “IS-IS” for short. This video introduces you to this very powerful routing protocol, which is often used in service provider networks.
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Kevin Wallace, CCIEx2 #7945 (Collaboration and R&S)
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Intermediate System to Intermediate System (IS-IS) Routing Protocol Fundamentals
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Пікірлер: 68

@conurm Жыл бұрын

you saved my final project with this video, thank u a million

@AnikulapoOlawale 7 жыл бұрын

Thank you so much sir. This is the first time I have seen the configuration anywhere. It is well explained and I get it. Thank you sir.

@damaliamarsi2006 5 жыл бұрын

I'm running ISIS in my network with all the same area and all l1/l2 routers (small network) so I can see all the routes. Also using a process ID (router isis 100) and of course have to do on the interface "ip router isis 100" but otherwise plan on splitting it up into different areas later. Definitely a fun protocol to play with and works great. Fantastic video that explains it well.

@simons1992 2 жыл бұрын

Very useful to watch this if you are gearing up for deploying SD-Access in your enterprise

@Oceanbig01 7 жыл бұрын

thank you sir for this wonderful lecture on IS-IS. its been so help..

@clcartlidge 7 жыл бұрын

Studying for my CCDP - ISIS is mentioned quite alot thanks for this!

@ndeyanickche6369 6 жыл бұрын

thanks, IS-IS has been made very easy to me through this video.

@ipforlife8918 7 жыл бұрын

Many thanks for this explanation bro, just in 14 munits I understand IS-IS . You're the best

@jmontign1 Жыл бұрын

Excellent explanation and demonstration. I would love to see a deep dive into this protocol. IS-IS has been popping up more and more lately in corporate networks as underlay.

@howardtur 7 жыл бұрын

Thanks Kevin, clearly described in your video

@georgiajaeger8567 5 жыл бұрын

Thanks for the post, very helpful video Kevin.

@akmbenoziralam3511 5 жыл бұрын

Great ! Just learnt IS-IS basics in a few thanks sir .

@oneznzeroz 3 жыл бұрын

I’m actually watching this because my company is getting ready to use it :)

@voynich7119 3 жыл бұрын

IS-IS is now in the curriculum of the new CCNP Service Provider route. Unfortunately there aren't much ressources specifically for the SPCOR exam (at least as far as I know). So you kind of have to look for everything yourself. This was helpful for sure :)

@diaphanoux Жыл бұрын

I've always wondered if Cisco pretends that candidates are supposed to just take the plunge with the SPCOR exam and hope for the best. I think we can all agree that even if you're a networking Guru, you'll definitely stump into a few red herrings and mess up, probably even fail the exam.

@msconfig9786 Жыл бұрын

personally i am taking the SPCOR exam in Aug 2023 CBT nuggets has a great Leacture type of explaination that helps better understand ISIS, He didnt really touch on the 00 which is the NSEL it is just like the TCP/UDP numer for ISIS it just tells ISIS what process to use. He didnt explain also the 11. before he added all those extra 1's to describe the Area nor the system ID or the NSAP addressing. Ik this was supposed to be a quick introduction to ISIS but i personally think breaking down ISIS addressing will help a lot of people when configuring it on the CML.

@akshaybaishander4230 11 ай бұрын

can you please purpose of making network addressing like that?@@msconfig9786

@mesmeridze1 2 жыл бұрын

Thank you Kevin, quick and useful.

@gbengaagunsoye1040 3 жыл бұрын

This is so helpful. Thanks Kevin!

@sigilai89 7 жыл бұрын

God sent. A big Thank you.

@dg5109 3 жыл бұрын

Thanks Kevin, great video as always!

@mr.hemsley1238 2 жыл бұрын

Kevin thank you for the explanation you are amazing!

@itsshowtime6412 5 жыл бұрын

We WILL run into it, and it should even be in the CCNA imo (or at least CCNP Route) :)

@Taurus.x85 7 жыл бұрын

Amazing as always

@carlmaynewheeler 3 жыл бұрын

thanks Kevin, great video as always!

@alfortner6929 3 жыл бұрын

Great Video. Practical and clear.

@amirahmed1404 4 жыл бұрын

Thanks a lot Kevin. Great video 👍

@rahul_vasishtha 3 жыл бұрын

thankyou, very clear understanding,

@JN-ju6of 5 жыл бұрын

Great video, thank you

@overtheedge107 4 жыл бұрын

Thank you Kevin

@abdoulazizhassana5167 6 жыл бұрын

Thank you!

@feedbrain6257 7 жыл бұрын

Always high standard of training Sir:)

@raj_jaisur 4 жыл бұрын

Hey Kevin, Great Video.

@AntonellaAngelini 5 жыл бұрын

gives very significant insights! thanks :)

@faisalak7 3 жыл бұрын

Thanks Sir

@christianhiebl8501 6 жыл бұрын

I discovered this the other day. If you configured Is-Is the same level 1 on both ends of interfaces and different areas it will turn it into a level 2. If it's same area then it will turn it to level 1. Just thought I'd share.

@TheSathyam21 6 жыл бұрын

Nice explaination.....

@alexanderrudakov59 3 жыл бұрын

great video!

@aniessaboulsoof 6 ай бұрын

thank you very much

@helpeachotherall 6 жыл бұрын

I am new to your channel , very Nice explanation.

@raficnoureddine3979 Жыл бұрын

great lab thank you

@alfredoboscabataller9899 6 жыл бұрын

Awesome and well explained ISIS lesson!

@Harun1401 2 жыл бұрын

Good Job! thanks

@stefanosvirzi Жыл бұрын

best explanation ever !

@hhhhhh7406 7 ай бұрын

Thanks

@colinleocanna 7 жыл бұрын

Just what I was looking for. Been looking into Fabric path of late. Thanks so much Kevin.

@c0tt0nm0ufh 3 жыл бұрын

TYVM

@mrfunnelz 3 жыл бұрын

I just like this man's voice

@kencheng2929 4 жыл бұрын

Gold!

@mariomatejka 7 жыл бұрын

IS-IS is part of CCDP. Used in the core of many ISPs, it could outlive EIRGP.

@TruthNerds 5 жыл бұрын

Beat me to it - by about a year. ^^ As a result of my work, I have access to the backbone topology of the main AS of a tier 1 ISP. They use IS-IS (and MPLS but AFAIK all MPLS routes are automatically configured based on IS-IS), and BGP of course. There are way over 1,000 level 2 (rsp. L1/L2) routers. I know of a smaller ISP AS that uses OSPF, but for the most part, ISPs seem to consider OSPF more of academic interest rsp. for smaller networks such as company site networks. There's the recommendation (again, IDK to what extent it's based on fact) to not use OSPF for more than 600 routers with interfaces in the same area, in particular the backbone (area 0). And I have yet to see a single ISP backbone using EIGRP. The main concerns are probably scalability once more, and potential vendor lock-in. (Note that the use of Dijkstra's algorithm is _very_ similar between OSPF and IS-IS, so it can't be the source of any scalability differences.) Besides, great intro and very accurate.

@m-electronics5977 Жыл бұрын

14:10 can I make that Others way? That no default route would be advertised but only the networks?

@Lee-qp2et 3 жыл бұрын

R4 didn't get a default route but was able to ping R1, is this something to do with a newer ios. I'm using 15.6(2)T

@msizimthembu4332 7 жыл бұрын

Very much appreciated. Stigma gone :)

@amruthvaranasi1691 9 ай бұрын

can you explain why in net command we used 11.11.1111 and so on?

@Alestrix76 Жыл бұрын

Played around with this in GNS3 (admittedly using FRR and not iOS, but they're very similar) and initially couldn't get it to work. One thing I finally found out via trial-and-error: The level 2 router ID must be globally unique. It is not sufficient that the router ID is unique within its area.

@Patmorgan235Us 8 ай бұрын

I would think you would want all router IDs to be globally unique. But that definitely makes sense that L2s must be sense they facilitate routing between areas

@shahidrashid6740 7 жыл бұрын

Dear sir .can isis routing protocol using these days .plz tell us .i cannot see ccna ccnp s and mca mcsa syllabus

@helpeachotherall 6 жыл бұрын

Yes it is in use in few companies due to is-is is open protocol and easy. it used between cisco, juniper etc vendors

@Lee-qp2et 3 жыл бұрын

This is my first interaction with ISIS and I like the video which gave me the first steps into this protocol. What's the point of using a /24 mask on a point-to-point link if you're not going to use the last octet number the same as the router number? After watching you configure R1, I decided to do the following router myself then watch the remaining video to see if I got it right. Apart from me using the last IP address octet to represent the router number which, when learning is so important when looking at the routing table as mine was a bit different from yours.

@gatomas805 3 ай бұрын

I''m studying for my CISSP. In CISSP All-IN-ONE exam guide, it categorizes a IS-IS as a link-state protocol but you called a dynamic state protocol 0:38. Which is it?

@kwallaceccie 3 ай бұрын

It’s a Link-State Routing Protocol, like OSPF. Enjoy your studies!