How VLANs Work | Network Fundamentals Part 12

How VLANs Work | Network Fundamentals Part 12
VLANs are one of the most common technologies that you will see. Imagine that you have a LAN (a layer-2 broadcast domain), but you need to separate the devices connected to it. You could buy different switches for each group of devices, but a better option would be to use VLANs.

VLANs are a Virtual LAN. You have a physical switch, and the ports are assigned to a VLAN. Devices in one VLAN cannot talk to devices in another VLAN.

This is like using different switches, without having to go out and buy different switches!

Each VLAN has an ID, which ranges from 1 to 4094. Each switch port is assigned to one of these ports. Any ports with the same VLAN ID are in the same VLAN, which means they are in the same network.

As said before, devices in one VLAN cannot communicate with devices in another VLAN. To allow communication, we can use a router that is connected to both VLANs. The router receives traffic on one VLAN, and passes it to the other VLAN.

We will see how all of this works, and how it’s configured!

CCENT/CCNA ICND1 100-105 Official Cert Guide (affiliate):

In the next video, we’re looking to extend our VLANs across several devices using trunking, or tagging.

Overview of this video:

0:00 Introduction

0:40 Why we need VLANs

3:00 How VLANs Work

7:52 Routing between VLANs

10:32 Quiz Time

10:47 Lab

LET'S CONNECT

#NetworkDirection

[iyiolapeter]

I've never gained so much in a Youtube video. Gained my CCNA in 2019 and I've been in IT as Infrastructure engineer ever since, but I've learnt so much from your videos than I've from any other. This is beautiful

[MrMengemeto]

This is one of the best lectures all over the network!!! So understandable so easy to swallow. I love it.

[kylecostlow]

Its like you are reading my mind with the viewer questions you simulate, no one else seems to talk about the basic use case information you bring up, thank you.

[johnstonebos]

This must be one of the best networking tutorials not only in YouTube but also Udemy and all other paid services…

[kristiyanivanov]

thanks for mentioning cisco packet tracer in one of the previous videos, I did the whole course in one go and it was fun

[-uclw]

Best channel for networking, by far. I would highly recommend it to anyone interested in learning

[squelchedotter]

Thanks once again for this great series!

[jairusan]

Just excellent and enjoyable to watch. Keep it up Network Direction 👍

[radingoranov]

Love your vids! They are really helpful and easy to understand. Thanks for making them. ^u^

[dasmalas]

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[hassenbouchhiwa]

This channel is underrated .. thank you guys

[francescogalli]

I simply love your Channel... Really congrats✌🏻
It is really useful for me

[tinabatra]

Thank you so much for sharing this information

[globalfaith]

Thank you again for the great content and easy learning experience. I went on your website and checked out your "labs" my question is do you need and "special" software to run the "labs" ?
I was also wondering if you would do a tutorial/promo video about your "labs"

Thanks for all your help with simplifying "networking" You definitely have easy to follow content.
May God bless you and your channel !

[abdullaalblooshi]

Nice animations, clear voice and explanation. Just wondering which program you are using for making such nice video.

Thanks

[Velo]

Yes, I have trouble understanding VLANS, also.

[tymon]

Please are you using the CISCO packet tracer I am trying to do what you're using for the labs on a IMAC

[mocello]

Hey, great video as always! Your channel helped me a lot in understanding the fundamentals about networking :)
I think I found a typo though: in the logical diagram (10:50) both networks are called 192.168.10.0/24. But when you ping from workstation 1 (15:45) you use the IP 192.168.20.1 for server 1. So I guess the server network really is 192.168.20/24?

[power-max]

OK, so I pick up some fancy smartswitch or managed switch used on eBay.. And I hook it up to my edge-router. If I have 10 VLANs configured on my 24 port managed switch, do I need 23 routers to tie them all together? My edge router only has a couple ports, the "LAN" ports are just switched so really only 2 right?

[swt.angela]

So, why isn't the switch also the router in this case? Is it due to separation of duties and that the switch is not powerful enough / not equipped to route packets? And why two physical interfaces to the router for each VLAN? Wouldn't it be more efficient to just have one?