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VTP mode

As explained in Acing the CCNA Exam: Volume 1 Fundamentals and Protocols

A VTP mode is a switch operating role that determines how the switch creates, synchronizes, forwards, or ignores VTP information.

VTP mode determines whether a switch creates VLANs, synchronizes its VLAN database, advertises changes, forwards VTP messages, or ignores VTP. Configure it with `vtp mode mode`. section 13.2.2

The four modes have distinct operational effects:

  • Server: the default; creates, modifies, and deletes VLANs, advertises changes, and synchronizes to higher revision numbers. section 13.2.2
  • Client: synchronizes like a server but cannot create, modify, or delete VLANs. section 13.2.2
  • Transparent: manages an independent VLAN database, does not synchronize or advertise its changes, but forwards VTP messages. section 13.2.2

Client-mode restriction

After `SW3(config)# vtp mode client`, entering `vlan 5` produces `VTP VLAN configuration not allowed when device is in CLIENT mode.`

How Acing the CCNA Exam: Volume 1 Fundamentals and Protocols covers it

How deep it goes
Explains four modes, synchronization behavior, revision numbers, message forwarding, and a rejected client command.
Examples
Uses a client-mode VLAN-creation failure and a transparent-mode message-forwarding scenario.
What it assumes
Assumes basic VLAN knowledge while defining VTP participation, synchronization, and revision-number behavior.
What you can do after
Operate/configure VTP roles with `vtp mode mode` and distinguish their VLAN and synchronization consequences.
How it connects
Connects VTP mode with VLAN databases, VTP domains, revision numbers, VTP messages, and VTP version 3.
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Related concepts

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