VTP

1 VTP Concepts

1.1 What is VTP

Simple network VLAN mangement

Enterprise VLAN management

VTP Advertisements

Benefits of VTP

VTP Domains

VTP Types

VTP Server

VTP Clients

VTP Pruning

VTP Transparent

2.1 Default VTP Configuration

2.2 VTP Domains

Default VTP Configuration

VTP Domains

VTP Domain name propagation

The network manager configures the VTP domain name as cisco1 on the VTP server switch S1. The VTP server sends out a VTP advertisement with the new domain name embedded inside. The S2 and S3 VTP server switches update their VTP configuration to the new domain name.

2.3 VTP Advertising

VTP Frame Structure

Destination MAC address - This address is set to 01-00-0C-CC-CC-CC, which is the reserved multicast address for all VTP messages.
LLC field - Logical link control (LLC) field contains a destination service access point (DSAP) and a source service access point (SSAP) set to the value of AA.
SNAP field - Subnetwork Access Protocol (SNAP) field has an OUI set to AAAA and type set to 2003.