VLAN Trunking Protocol (VTP) Explained | Version 1 & 2

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VLAN Trunking Protocol (VTP) is a Cisco proprietary protocol used for the management and maintenance of VLANS across a switched network.

Without VTP, if you need to add, delete or edit a VLAN in your network then you would need to login to each and every switch and enter the commands manually. That's not a problem if you have two or three switches, but it can become very time consuming when you have a few more.

VTP solves this issue by allowing all switches (within the VTP domain) to sync their VLANs together in a VLAN database. The goal is to have every switch running the same version of the VLAN database.

The switches do this by sending different messages to each other. These messages allow them to update, maintain and synchronise their VLAN databases.

Types of Message
------------------------------
Summery Advertisement

These messages are sent to let all the switches know the current revision number of the VLAN database

-Domain name
-Password
-Revision number
-Followers

Subset Advertisement

These messages contain VLAN information so the other switches can add them to their own database.

-Domain name
-Revision number
-VLAN info

Advertisement Request

These messages are sent when a switch needs to request a Subset Advertisement to sync it's database.

Requirements
------------------------------
There are some requirements that need to be met before the switches will sync their VLAN databases.

-Be in the same VTP domain
-Have the same VTP password if set
-Connect over a trunk

Modes
------------------------------
There are three different modes that can be used.

Server
-Can create VLANs
-Can send updates

Client
-Cannot create VLANs
-Can send updates

Transparent
-Can only create local VLANs
-Does not send updates
-Does forward updates from other switches

VTP Pruning
------------------------------
Pruning is a feature of VTP that can helps prevent unnecessary traffic from being sent to switches with no ports on a particular VLAN. The switches will 'prune' VLANs from trunks in order to reduce any unnecessary bandwidth and resource usage.  They do this by sending join messages.

#ccna #cisco #networking

[mattjoe]

CertBros, I am speechless, I don't know how to thank you, but in college these professors DO NOT explain lesson clear they want to feel important and smart, and not helping the students, If you ask them a question they tell you to go to book, CertBros thank you very much for short, smart and clear way explaining It, LOVE YOU.

[FarhanKhan-bwbm]

Simple and to the point. That is how all the tutorials should be !!

[mingxindong]

I really like how short and clear when you explain how the vtp works, thank you so much.

[zeynelsavari]

A pro on explaining, a pro with recording it, a pro with presenting it. Someone must increase your number!

[diegonegri]

I'm preparing for CCENT and I've got to say, this video is absolutely great!! Clear and full of info!! Thank you!!

[johnallen]

I'm so glad I found these videos. It's nice to be able to understand a topic thoroughly. I thought I was just gonna be able to read and pass, but I found out that wasn't gonna happen. But these videos are so helpful. They make info clear, concise, and to the point. You guys rock!

[dr.a]

I do not actually need all that information, but I really appreciate the way you deliver it ... it is fun and educational to watch. Thank you.

[hollyfielding]

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[md.shafiqulislam]

thank you bro...for your most valueable tutorials

[rajeevmishra]

I have watched so many videos but this video gives me the exact explanation what I expect . Thank you so much and i am also waiting for many more..

[Freespch]

Best because it is simple and to the point. Graphical representation is icing on cake.

[alebupeseyie]

The way you explained just wow, very clear and concise, simple and to the point.
Your video content is mesmerizing and awesome.
Thank You CertBros.

[ardentdfender]

Man I just want to really say this video was BOSS! All your videos are also BOSS. This was one the most confusing as hell topics I’ve come across so far in all of VLANS. You did a super damn great job in not only simplifying and explaining all of this, but with very great graphic and animation so well convey and e plain this that I totally get it. Your oratory skills in explaining all of it is totally on point. Whatever your doing in life, I hope your doing well at it. But please for all your subscribers and everyone that will eventually find your videos, please please Keep Making These So Well Explained Networking Concept Videos. I don’t think any subscribers here will disagree with me in the slightest on that. Your explanation of even difficult to understand concepts are in essence Nuts & Bolts Total BOSS!

[Gautam-ljwu]

I had my exam tomorrow and was not understanding this particular part.After watching the video, I am sure I would be able to do this if it comes in tomorrow's exam.Thanks for the help!

[MuhammadAnas-ctom]

This channel deserves way more subscribers, on the point with the explanation and presentation. Without wasting any time ❤️

[xtrait]

Thanks Cart.... I usually does not comment on youtube videos but after watching this video I ad comment because this is the best video I have ever seen on VLAN explianation, conceptual and configration all things are sum up here

[HarshKumar-meds]

Appreciate the clarity in the explanation. Please don't stop making them.

[batmac]

thanks for the video, its been very helpful especially for those who learn visually. Simple and Straight to the point! Thanks a lot and keep it up

[snehalakarh]

You teach the vtp trunking very easy way... Thank you so much.

[dinform]

Yes! Simple but to the point...Best explained..
You cleared all my doubts for vtp..
Thank a lot ..