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
Пікірлер: 268
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.
Simple and to the point. That is how all the tutorials should be !!
@Certbros
6 жыл бұрын
Thanks Farhan! Just what I was going for.
@FarhanKhan-bw4bm
6 жыл бұрын
CertBros I think there is one more mode in VTP called OFF mode to disable VTP completely.
@Certbros
6 жыл бұрын
Yes that's right. On some switches you can disable VTP with the 'Off' mode.
@VW_Fan
6 жыл бұрын
Off mode in in IOS 15 only. It isn't in IOS 12.
@ardentdfender4116
4 жыл бұрын
The additional info here by all those who commented on their being an “OFF” mode in later is very helpful to acknowledge. Thanks.
A pro on explaining, a pro with recording it, a pro with presenting it. Someone must increase your number!
@Certbros
4 жыл бұрын
Thanks Zeynel!
@ardentdfender4116
4 жыл бұрын
I agree with you man. His numbers will increase as people studying networking find his videos like me. And then find his videos so well explained both graphically in presentation but oratory explained as well.
I really like how short and clear when you explain how the vtp works , thank you so much.
@Certbros
4 жыл бұрын
Thanks!
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!
@Certbros
4 жыл бұрын
Thanks John! You're right, reading the books is only half the battle. A good video course, labs and practice exams should get you to a pass in no time. Good luck! 👍
I'm preparing for CCENT and I've got to say, this video is absolutely great!! Clear and full of info!! Thank you!!
@Certbros
4 жыл бұрын
Thanks Diego. Happy it helped. Let us know how the exam goes!
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!
@Certbros
4 жыл бұрын
Wow! Thanks for the awesome feedback Ardent. I'm currently working hard on a lot more videos. You will see a lot of content on this channel in 2020! Thanks for the support.
This channel deserves way more subscribers, on the point with the explanation and presentation. Without wasting any time ❤️
@Certbros
4 жыл бұрын
Thanks Muhammad. Need to get that KZread play button! 👌
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.
@Certbros
4 жыл бұрын
Thanks Dr. A!
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..
@Certbros
4 жыл бұрын
Thanks Rajeev!
@ardentdfender4116
4 жыл бұрын
Rajeev Mishra So true as well. I’ve studied this topic several times and all to end in some confusion. Go to KZread batch many other lengthy videos to still remain somewhat unclear. Find his video here explaining same VTP and all the lightbulbs go AHA, I totally get it. I feel so much better now.
I don't often comment but I got a new Job and was feeling a little bit out of my depth, but wow thank you all so much for these videos I am really getting up to speed and feeling a lot better about myself.🙏🙏🙏🙏🙏🙏
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
@Certbros
5 жыл бұрын
Thanks!!
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.
@Certbros
4 жыл бұрын
Thanks man!
You are a god send
@Certbros
5 жыл бұрын
Thanks Luis!
Appreciate the clarity in the explanation. Please don't stop making them.
@Certbros
5 жыл бұрын
Thanks Harsh. Working on some videos now.
Amazing, you explained in 17 min what my teacher could not in 3 hours, thank you very much for the content
@Certbros
3 жыл бұрын
That's great to hear! Thanks Roberth!
You teach the vtp trunking very easy way... Thank you so much.
@Certbros
5 жыл бұрын
Thanks!
Best because it is simple and to the point. Graphical representation is icing on cake.
@Certbros
3 жыл бұрын
Thanks Aashir!
best explanation. never commented on any video or like it but the way you explain is extraordinary.. made me do it
@Certbros
5 жыл бұрын
Thanks for the comment Junaid! Good to hear you liked the video!
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!
thank you bro...for your most valueable tutorials
Wow, that was a great video! So informative. Thank you for helping me program my switch. I've liked and subscribed. Thanks again!
Great video! The second time I watch it, now with a bit more knowledge on the subject, and you do a wonderful job at explaining everything. Congrats!
@Certbros
3 жыл бұрын
Thanks for the comments Antonio. Great to hear your are learning from these videos. Sometimes it can take a few watches.
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
The videos from cetbros are really tremendous. The most of the topics the way you explained was awesome. The people will love and start learning who doesn't have idea or interest in Networking !!! . We are really awaiting for more tech videos !!! Appreciate your great works
solid info. I enjoy your videos. keep them coming.
@Certbros
4 жыл бұрын
Thanks Steve
Great explanation about VTP prunning. I like the idea to putting all on Transparent mode.
@Certbros
4 жыл бұрын
Glad it was helpful!
Yes! Simple but to the point...Best explained.. You cleared all my doubts for vtp.. Thank a lot ..
Very clear and concise. I would love to see more videos from you for us starters
@Certbros
5 жыл бұрын
Thanks! Working on more videos
This is the best explaination on VTP ever. Thanks buddy
@Certbros
3 жыл бұрын
Thank you!
Great video as usual I see, Thank You!!!
@Certbros
4 жыл бұрын
Thank you!
I'd heard not to use VTP before but I didnt really know why until now!
Crystal Clear explanation
@Certbros
3 жыл бұрын
Thank you!
A+ Tutorial (simplicity at its finest) Thank you :)
@Certbros
3 жыл бұрын
Thanks Ashley! Great to hear you liked the video.
Great video. Easy to follow.
I want to thank you so uch for this video #certbros your channel should have millions following this great content .
@Certbros
4 жыл бұрын
Thanks Alay!! One day we'll get there!
Brilliant explanation, thanks to you mate I now fully understand this …. Thank you!
@Certbros
5 жыл бұрын
Thanks Daniel!
Very clear explanation. Finally I understood!
@Certbros
3 жыл бұрын
Great to hear this helped Marilyn!
best tutorial so far
@Certbros
4 жыл бұрын
Thanks Adil
Everything explained very precisely and crystal clear!!!!
Great video. Now I can talk about VTP with my eyes closed. Thanks
fabulous video, thank you so much certbros
@Certbros
4 жыл бұрын
No problem. Thanks!
this helps me for my exam revision. thank you
@Certbros
5 жыл бұрын
Hows it going?
@M3nt4LC4t
5 жыл бұрын
@@Certbros pretty good.. with your videos I could understand much better.. i was taking CCNA3 exam paper btw :D
Even if a switch has learned some VLANs through VTP, you still need to go on the switch to configure the access ports you need in what VLAN, the trunk ports who allows what VLANs etc. I don't see that tremendous help of VTP. It must be something I'm missing.
simple and to the point
@Certbros
3 жыл бұрын
Thanks Ashish!
Thank you for the videos 👍 I‘d love to see more of them coming!
@Certbros
5 жыл бұрын
Thanks Niklas! More will come.
Great video, helped put some things in perspective for me.
Awesome video btw, you guys are great! Keep it up!
@Certbros
6 жыл бұрын
Thanks David!
Really well explained! Thank you so much!
Explanation on point. Thanks for clarifying.
@Certbros
4 жыл бұрын
Thanks
awesome! thanks fo helping me study during this deppressing pandemic!
@Certbros
3 жыл бұрын
Thanks Liam. Happy to help where I can! Stay safe.
Are all of your videos like this? I just subscribed!
@Certbros
4 жыл бұрын
Yes they are! Thanks!
Best Tutorial for VTP
Great Video. Easy to understand. Very well explained.
@Certbros
5 жыл бұрын
Thanks Manny!
Please do a video on BGP (Border Gateway Protocol).
I'm so glad I found these videos
@Certbros
3 жыл бұрын
Glad you're here Mehdi!
Great video. I think you should mention that the vtp wipeout occurs when the removed and reconnected switch is in vtp server mode. If you change the vtp mode to client first, it shouldn't advertise the new database.
@Certbros
4 жыл бұрын
Thanks Scott, glad you liked the video. VTP clients can still cause wipeouts. When the server sees the higher revision number it will request a copy of the database.
@mountainscott5274
4 жыл бұрын
@@Certbros Thanks for correcting my misunderstanding.
Excellent 👍👍👍👍👍👍 you are genis such a great explanation
offcourse simle and to the point...cool..loved it.
@Certbros
5 жыл бұрын
Thanks Bijaya!
Thanks a lot for your great explanations.
Love this video! Thanks man!
@Certbros
3 жыл бұрын
No problem! Thanks.
very clear ! thank you so much
@Certbros
4 жыл бұрын
Thanks!
awesome, thanks straight to the point
@Certbros
5 жыл бұрын
Thanks Glen!
Amazing and absolutely clear ❤️
@Certbros
2 жыл бұрын
Thank you!
Nice and clear explanation about VTP, it was so useful.
@Certbros
2 жыл бұрын
Glad you liked it! Thanks.
I have never seen such a wonderful explanation in my life. Why do not you go through the full CCNA curriculum?
@mattjoe67
5 жыл бұрын
VERY GOOD IDEA, CERTBROS ARE VERY SMART THEY SHOULD START TAKING OVER THE CISCO CURRICULUM, THESE INSTRUCTOR OR PROFESSOR TEACHES IN COLLEGES, THEY ARE ALL BOZO AND RUDE.
@Certbros
4 жыл бұрын
Thanks Mohammad! Working on more content now.
@ardentdfender4116
4 жыл бұрын
I so agree on this. I would appeal to the universe as well that he goes through the entire and add the concepts missing from CCNA Course and make video explaining them in how he already explain stuff. Because he does it already so well in presentation and in a very understandable way. I hope he does.
Yea that's right BirsbaneAU, if you ever take a switch off the shelf, no matter what, delete the VLAN.dat before putting it into production.
@SEAhawkstwelfthman
3 жыл бұрын
Everything back to default IOS image.
Good stuff man. Clear and well explained.
Great! explanations are very clear
easy and simple well done
@Certbros
4 жыл бұрын
Thanks Sheba
Aweosme videos, so helpfull please keep them comming!
@Certbros
4 жыл бұрын
Thanks! More videos on the way 👍
VTP YOU CANT STOP US NOW!!!!
Loved this, thank you
@Certbros
4 жыл бұрын
Thanks!
thank you
@Certbros
3 жыл бұрын
You're welcome 👍
Thank you so much
informative, thanks big guy
@Certbros
4 жыл бұрын
No problem! Thanks
Bravo!🔥🔥
@Certbros
4 жыл бұрын
Thanks!
Awesome! Continue doing your awesome videos :)
@Certbros
4 жыл бұрын
Will do! Appreciate it 👌
Great guide man thank you.
I brought down a whole high school for a couple of hours because of the VTP revision. For all you youngsters out there use VTP with caution.
@Certbros
4 жыл бұрын
Haha. You're not a real network engineer until you bring down a network!
You guys make tutorials interesting. Legit
@Certbros
6 жыл бұрын
Thanks man!
really helpful!
@Certbros
5 жыл бұрын
Thanks!
after cbt nuggets videos i did not think vtp explanation could be made simpler.. boy was i wrong
I would also add that VTP configuration is stored in VLAN.dat and not running-config / startup-config.
@NaveenUmariya
6 жыл бұрын
In NVRAM , .dat file ✌️
Thanks for the great content
@Certbros
3 жыл бұрын
You're welcome! Thank you for the comment 👍
Amazing explanation
amazing teaching technique
8:28 - No the switch doesn't need to be in server mode. A switch in client mode with a higher revision number will push out its database to al other switches in the VTP domain.
@Certbros
6 жыл бұрын
Yes you are right! Slight oversight. Video has been updated. Good spot.
@VW_Fan
6 жыл бұрын
Quick reply! Thanks!
@Gksec-lr7xg
6 жыл бұрын
Good point, had to let the CCNA instructor know about this..
NIce ,Simple and to the point.
@Certbros
5 жыл бұрын
Thanks Negatu!
amazing explanation!!!!! maybe you can add rstp for the next one?
@Certbros
5 жыл бұрын
It's on my to-do list for sure!
best explination this totrl help me in my revision stdy thx!!!!!!!!!!!!!!!!
Thanks
great sir
thanks for your help
@Certbros
4 жыл бұрын
No problem!
Thank you CertBros
@Certbros
5 жыл бұрын
Thank you Darryl!
To save the risk of deletion because of increased revision no, can't we just erase entire configuration and make it fresh, now since it's revision no is less than servers it must be able to sync with server
Excellent tutorial, Thank you
@Certbros
5 жыл бұрын
Thanks Mohammad!
wonderful explanation Keep the good work.
@Certbros
5 жыл бұрын
Thanks Hamza!
Mate your explanation is just awesome. Thank you very much. Any ETA on your new CCNA course? Cheers
@Certbros
3 жыл бұрын
Thanks! I'm working hard on the course but there is a lot to cover. I'll be doing a prelaunch soon for everyone who has registered their interest so make sure to sign up. 👍
Thanks for the awesome tutorial! I've a question: @5:50 "Links must be trunks" what does this mean?