VTP

VTP Concepts

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

Default VTP Configuration

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.

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.

VTP Frame Structure

VTP Revision number

VTP Summary

VTP Subset

VTP Request

Advertisements Details

Version - This field displays the VTP version used. On Cisco 2960 swithces the version is either VTP V1 og VTP V2.
Code - A code that identifies the type of advertisements-
Followers - The Followers field indicates that this packet is followed by a Subset Advertisement packet.
MgmtD Len - Indicated the length of the management domain name.
Management Domain Name - The name of the VTP Domain.
Update Identity - The update identity is the IP address og the switch that is the last to have incremented the configuration revision.