Vlan, VTP and Trunking are most fundamentals yet important topics in Layer 2 Networking.
I explain this topic from design, theory and hands-on perspective in my CCIE Enterprise Infrastructure Training.
Before using Vlan, VTP or enabling Trunk in the network, below best practices should be kept in mind.
Of course best practices may not be applicable to every network, so whichever is suitable for your network, on your networking devices, and necessary, then consider them.
Orhan Ergun, CCIE/CCDE Trainer, Author of Many Networking Books, Network Design Advisor, and Cisco Champion 2019/2020/2021
He created OrhanErgun.Net 10 years ago and has been serving the IT industry with his renowned and awarded training.
Wrote many books, mostly on Network Design, joined many IETF RFCs, gave Public talks at many Forums, and mentored thousands of his students.
Today, with his carefully selected instructors, OrhanErgun.Net is providing IT courses to tens of thousands of IT engineers.