Multicast Explained in 5 Minutes | CCIE Journey for Week 6-12-2020

[@lawlade]

explanation begins @1:53

[@DaveThomson]

yeah, could of been explained in 3 minutes not 5

[@lawlade]

@DaveThomson totally agree

[@chandruonmuzic]

For many years i am looking for this one. So short n sweet. Thanks a lot and all the best for your ccie

[@Gus_Leon]

Hi Knox, Great explanation on Multicast in 5 minutes. Good job! I hope your child is doing much better. Stay safe, Gus.

[@anonymouscommentator]

5 minutes? the video is over 9 mins long

[@HollowGrey]

Wow.. thank you! I am encountering multicast at work and this crash course helped me so much. Separating multicast into the L2 and L3 parts made it so much easier to digest. Also, now I understand how IGMP snooping plays into multicast.

[@blatchie4608]

Just wanted to say that this is very well made and even a relative beginner like myself understood the more complex parts very well thanks to your wonderful explanation :)

[@patricegomado4953]

Cannot wait to see your boson demos on CCIE preps. Thank you in advance!

[@edwelthrope9197]

Why is the video 9 minutes

[@mnfchen]

Explanation starts at 1:54.

[@joeford8035]

My understanding is that IGMP is a layer 3 protocol (network layer) not a layer 2 protocol, unlike IGMP snooping.

[@haribolanil]

IGMP Layer 2

[@taokichavez9319]

almost 2 mins to get to the point... nice!

[@HandOfGilgamesh]

Question please - I don't get it multicast signal is sent to multiple destinations, when the stream is live, does the traffic go all over the internet trying to find hosts/routers listening to the port/IP of the service? sounds like alot of traffic - this is most likely sacrilige question, but I come from CCNA, trying to understand Class D Addressing, and am deffo missing something. thank you.

[@SamuelGermain97]

I do exactly the same thing, nugget, book, practice exams, & labs. I use boson for practice exams and labs!

[@lohphat]

How do L2 switches know to replicate packets to ports? Do L2 switches need to be upgraded for them to handle 33-33-xx-xx-xx-xx frames correctly? Does IPv6 MC membership operate on a voluntary membership basis or do routers and switches need to maintain membership states to know where to send subscribed streams?

[@huzaifasajid6830]

Skip to 1:53 to save time.

[@anachronic-vibes]

I remember back in April when i was going through multicast and how good it felt when i finally could say "ok, i'm ready, next topic". Two VMs with VLC would do great for a GNS3 multicast lab. However i had some trouble with running both the sender and the receiver using the same hypervisor, but using two hypervisors (vmware player and virtualbox) will work just fine. This exam is not that hard. You'll have no trouble passing it. After checking the blueprints and watching reviews, i think the ENAUTO and ENARSI will be much harder exams than ENCOR. Your journey is an inspiration and i hope it will end in success. Good luck man!

[@DataKnox]

ENAUTO was challenging, but nowhere near as hard as DEVCOR. With the right study plan and practice, ENAUTO is definitely passable

[@persistent25u]

Thank you and best of luck with your studies and exam

[@sebastianscharnagl8729]

Thanks a thousand! It explained all my basic questions, especially the second part with the switch layer!

[@gregorysmith4518]

I'm battling to keep Apple Airplay connected to any device for longer than 15 mins, any advise? between 8-15 mins our stream dies and we have to try reconnect, sometimes warm rebooting the devices works , sometimes we have to remove the power and then connect. I have enabled IP Helper and mDNS and done the relevant WLAN to WLAN rules to get connection.

[@DanBurgaud]

4:10 umm, why is 224.1.2.3 being routed to 10.0.1.10????? the IPs do not match

[@MegaFiredon]

Hi i need to learn how to do a multicast and what i need to do It i have a TV Station can you please show us a step by step guide of how to set It up and what is needed?

[@DillyDogSays]

Which PIM mode uses a shared tree only?

[@BioBrain]

start at 1:55

[@newwavex8665]

Broadcast wouldn't work in this scenario right? Due to the recipients being in a different broadcast domain?

[@davidjohnson8930]

IGMP is layer 3. Why are you saying it's layer 2? Did you mean IGMP snooping which is layer 2?

[@donedeal51]

Good call out

[@sympathism]

Why does the router not use the destination mac adres of the guy in his network who wants to have the stream? Is it because that is unicast-like?

[@dkoxperiakoziukov3808]

Thanks for the good explanation. May I ask you a question? I have a streamer running on my router OS embedded. The stream is coming over the udp to the multicast address. When I route the stream to my internal router interface (where PC is connected) VLC is successfully connecting and playing video. But I need to stream outside and when I rout the stream to the external interface I see the multicast traffic running (with tcpdump), but my VLC on my local PC doesn't connect anymore. My provider told me they have IGMP and PIM set and running. Unfortunately I cant check the stream as I have no other available PC. And the VLC on the smartphone doesn't support udp routing. What I misunderstood? What am I doing wrong?

[@chansetwo]

Why are CCNP and CCIE topics showing-up on my CCNA Boson practice exam?????? Very frustrating.

[@valerio53061]

Hi Knox, is there some LABS about Multicast? thanks

[@manaman8608]

Wow…short, sweet and to the point!

[@mmccrack3n]

The switch flood and how snooping works is good to know. Thanks.

[@tdragon87]

How about queriers, that check if a client is still subscribed to that multicast? Otherwise it'll just keep sending data down that port. How I explain it, the highest level possible explanation: it's like a radio station. When you want to listen to a station, you just tune into that frequency. In any case that's missing a lot of points of course.

[@Huntabyte]

Awesome explanation of multicast Knox! Funny my study methods are flipped a bit from yours, I always read books first, and then get a second easier to comprehend explanation from an expert via video!

[@Mi_Fa_Volare]

Can I make static routes of the multicast group addresses to narrow down the overlay path or will the routing table conflict with the igmp routes? Or will igmp override the routes and ignore them?

[@shaunasigren]

Isn't igmp layer 3?

[@bilalbashir]

Good video short and precise

[@parheliaa]

Finally, somebody addressed L2 problem in "multicast introduction" Seriously, my first question when I heard "multicast is a transmission from one source to selected clients" was "cute, but how the hell Switch knows that this is multicast and does not flood it as unknown unicast?"

[@DataKnox]

That's exactly why I wanted to spend some extra time on it! I was stuck there, too

[@chaseduke5322]

Exactly! This is the key that should always be taught, but isn’t... Great video.

[@AAA-fi4pw]

Anyone know what he's using for a whiteboard here?

[@anonymousunitedph]

so what is the best multicast rate for gaming??

[@moroccangladiator]

Nice shot 👌

[@paulpaula2011]

Brilliant explanation

[@cliffclof]

Bravo. This is great explanation.

[@mon0theist_tv]

Video starts at 1:54

[@sidefmovies]

This is perfect Knox. Knowing an overview of a topic makes it easier when facing the subject in detail later. I’m wondering if cbtnuggets should have this style nugget for each subject in a given course / certification. Thanks 👍🏻

[@GnarlySpookXT]

im a nerd and now want to understand multicast IGMP snooping within a VLAN

[@bartomiejpotaman6973]

Sure buddy

[@GnarlySpookXT]

@@bartomiejpotaman6973 welp just configured a stacked switch for it so yeah. Doing pretty good.

[@TerenceKearns]

need this for ndi digital signage

[@adamlicht6614]

This was brilliant. Very well done sir!

[@Geo0792]

I hope your child is well by now. Thank you for the video, I was able to have a better a idea about multicast now

[@Integr8d]

Latitude on your camera is great. Which model are you using?

[@DataKnox]

You can find my gear at Amazon.com/shop/dataknox

[@adnanalghail689]

Love it Knox, Thanks.!

[@TehObLiVioUs]

I LITERALLY came to youtube for your learning explaination ( YEP YEP *watches the video* ) 1.) get a high level overview of the topic first 2.) go in depth 3.) do examples/labs if there are any to do

[@AgentRacerX]

This was awesome! thank you!

[@BullCraftMaxx]

I thought IGMP is layer 3. IGMP Snopping is Layer 2 I believe

[@themistoclesnelson2163]

Thanks for the simple explanation!

[@snehapradhan8472]

Wooow....really nicely explained

[@ElreyRayo]

Nice job 👌

[@ApostKef]

Omfg, you nailed it!!! Thanks!

[@watermanli]

Great Job!

[@TobiasRuano]

You are a savior!

[@Dot0011]

good video, content starts at 1:55

[@toriaezunama]

Awesome. Great overview

[@arturovelasco7200]

Excellent explanation, I also started studying for the ENCOR exam, how do you recommend lab MST?

[@DataKnox]

EVE-NG, or buy some switches off eBay!

[@HeyItsWatson]

Didnt you mean explained in 9minutes and 13 seconds?

[@barsvelioglu2276]

Really nice explanation. Thanks. Subscribed (:

[@etutorshop]

Viewers please cut to the chase and jump to 1:52 to start with multicast :-)

[@peterhinton]

It takes you 2 minutes to explain that you’re about to cover Multicast in 5 minutes? See the problem?

[@0zillabox0]

Thank you! At least, I hope I learn.

[@SAIKIRAN-bf8ko]

You did it , I think this is how zoom and WebEx work in the cloud ..., Aren't they ?

[@robearhong]

Moses?

[@kofo757]

Great

[@deokyongsng]

I should’ve watched this video before I lost my hair.

[@robertvandyke9781]

great

[@ivorobotnik4329]

Great video! Simple and easy to follow!

[@RockefellerSidney]

3882 Verla Ridges

[@asceansionlee9340]

did u say FAMILY? that right don

[@joeheaney3641]

If you close your eyes it sounds like micky mouse is doing the voiceover 😂, great video tho

[@bigevilbeard]

Nice beard brother!

[@DataKnox]

It’s getting there!

[@AeroAngle]

is this how college librarys send messages "5 minutes before this computer turns off"???????

[@allanumali]

The background music is very distracting. I can't focus on what you're saying...

[@allentoyski]

halfway through on the text book wooow

[@jack53104]

That vibrating death star is really annoying :(

[@o-o857]

2 minutes of a 9 minute video spent not explaining the thing in the title, nice job

[@rogersantosprojects]

IGMP is layer 3

[@tkokflux6322]

blud this first minute or so ur simply yappin get to the point

[@troysipple2591]

The CCNA R&S didn't go into multicast a whole lot. I've kind of been wondering how it works in full detail.

[@denccvv1107]

Video starts at 1:55