Overview
VLAN Trunking Protocol (VTP) simplifies VLAN management by allowing an administrator to create, delete, or rename a VLAN on one 'Server' switch and have those changes propagate to all other switches in the VTP domain.
VTP Modes
- Server: Can create/modify/delete VLANs and sends advertisements.
- Client: Receives advertisements and updates its VLAN database; cannot modify VLANs.
- Transparent: Does not participate in VTP but forwards advertisements to other switches.
- Off: Ignores VTP advertisements.
Risks
A switch with a higher Configuration Revision Number can accidentally overwrite the VLAN database of an entire network if added incorrectly.