VLAN Trunking Protocol (VTP) - Theory and Configuration

[@incrediblestevrhymz2260]

My Experience with VTP during a deployment for a client was horrible. It was a network optimization project, our client bought some new switches - two 3850 switches to be stacked and used at the core layer and a couple of 2960-x switches as well for the access layer. We avoided VTP configuration as we didnt want all of the VLANs on the Core Switches replicated on the Access layer switches, unknown to us, VTP had been configured on some of the older existing switches, no password or domain name but VTP was running on them. Everything was working fine until we plugged in the old switches to the network....like a plague, the entire network just came to a screeching stop, this happened while serious work was going on . I nearly ran mad, my heart was pounding, I couldn't understand what was going on... I did a little bit of troubleshooting and discovered that the VLAN assignment on some of the new switches had changed to the VLANs on the old switches we had just connected to the network. I checked the Core Switches and discovered the same thing....The luck I had was I already had a backup copy of the configuration running on the Core switches.... took me about 30Min to get things back up again.....that was the longest 30 to 40 min of my career as a network engineer, calls were just coming in from right left and center..................After that experience, I made it a point to always put every switch on transparent mode irrespective of the existing configuration before adding them to a network......

[@damiannaziomek8714]

Now I finally deeply understand how VTP works . Great job Kevin !!

[@jeffherdzina6716]

Great job, Kevin. I am so glad I found your channel.

[@therealdaveh2428]

Thank you Kevin, it's greatly appreciated! I recently purchased your CCNA 200-301 Video Course also and are really enjoying it.

[@twincities651]

Did you purchase his course directly from his website or safaribooks online?

[@shadowthehedgehog2818]

Thank you Kevin, much appreciated

[@jaydnteoh8448]

Love how you explained everything. Thank you so much. It’s even better than my lecturer😂

[@vuaiuongvuakechuyen5859]

Thank you Kevin. I love your enthusiast expressing in your face!

[@lucas93177]

I heard that some people had questions about VTP in the exam. Suprisingly VTP is described in the ENCOR official certification guide!

[@lucas93177]

Btw 278 likes/0 dislike! Never seens that on youtube!

[@kwallaceccie]

While I can’t speak to what I’ve seen on the exam due to NDA restrictions, VTP is a topic 8 cover in my ENCOR training class.

[@isimoto]

Thank you, couldn't be better, a video few days after I read about the VTP...just made everything clear now :)

[@mikendala6722]

Watched in July 2021, well put. Easy understanding

[@guimaraeste]

Best video about VTP! I finally understood the concept! Thank you!

[@Techtips200]

nice videos ..2020 will see Kevin back to his best.

[@IT-Presales]

Kevin makes people understand very easily and in a simplified way... Kevin any idea on GVRP or MVRP..

[@kwallaceccie]

Great question! We haven’t produced any training on GVRP and MVRP yet, but those would be very interesting topics.

[@IT-Presales]

As these are Industry standard protocols so does Cisco also support GVRP or MVRP.....

[@Cryp2nalist]

Thanks Kevin, you make it so easy to understand.

[@fabrypm]

VTP is an alternative to reduce broadcasting on the network that should be used in corporate data networks?

[@NavidDariya]

Thank u Kevin for sharing about VTP although it isn't more in the CCNA

[@kwallaceccie]

As I say in the video, it’s not on the CCNA or ENCOR blueprints, but I still think it’s important for you to know.

[@marioschatzipavlis2468]

Congrats for the great video. It was very helpful for me. Keep on the good work.

[@jackwilson4863]

Could VTP be used in conjunction with a VMPS? So only one VMPS would be necessary for the whole switched network instead of one VMPS for each switch. Is that possible?

[@amirshadmani4830]

Great explanation thank you!

[@ericgoodman9876]

Kevin, can you also remove the vtp domain name, and then re-add it before you put back into production? Won't that change the revision number back to 0

[@androidery1999]

Perfect. Thank you !

[@lidoratar2509]

when you change the switch to transparent mode so the revision number will be set to 0 and then changing it to client mode, does the revision number change back to what it was or stays on 0?

[@marcuspezzotti5063]

thank you this is very helpful

[@scorpio_1312]

Thank you Kevin, well done sir!

[@benjaminwharton6264]

Thanks Kevin

[@BullCraftMaxx]

Great video!

[@byhelvete4757]

Amazing

[@twincities651]

Is your CCNA-301 course on your website different than the one on safaribooks online? I'm confused because the course on safaribooks says it's still not finished but the course on your website is?

[@kwallaceccie]

Thanks so much for your interest. The videos are the same as what’s on Safari. The course on my site is complete, and I turned the course over to them in mid-October of last year. So, I don’t know why they would say it’s not complete.

[@twincities651]

@@kwallaceccieThanks for the fast reply. Yeah safaribooks is calling it a sneak peak and saying the videos might still be in production and the product might not be completed. I may still purchase from your website just because of the practice labs.

[@network_king]

Some reason just never liked the idea of this protocol, maybe V3 would not be so bad but still dislike this protocol. I also have to wonder about security with this as in theory it seems someone could find a way to make a switch with like a VTP revision number say 500 then that switch has no vlans in it plugs in network and boom nukes everything. I guess V3 this would be less an issue, but then that master switch seems like a single point of failure. Network I deal with is small so I just assume do it all manually as changing a trunk is just 2 changes, or I could also just push the changes in bulk through something like Cisco Prime.

[@IT-Presales]

Hi Kevin...does Cisco support MVRP or GVRP...?

[@kwallaceccie]

Some, but not all, Cisco switches support MVRP and GVRP. Please check your switch’s documentation for your specific switch’s capabilities.

[@Bruce.-Wayne]

Thanks...👍

[@MohamedAli-yw9nz]

Thanks Mr.kevin٫ VTP is a good technology , but it can turn to a nightmare if u didn't deploy it probably

[@kwallaceccie]

Absolutely! That’s why we cover best practices in this video, such as how to reset the Configuration Revision Number, apply a password, or use VTP version 3.