To achieve connectivity through a VLAN trunk between switches, the VLAN must be configured on each switch.
The VLAN Trunking Protocol (VTP) provides a simple means of maintaining a consistent VLAN configuration throughout the switched network. VTP allows switched network solutions easily scalable to other dimensions, reducing the need for manual configuration of the network.
VTP is a messaging layer 2 protocol that maintains VLAN configuration consistency across a common administrative domain, managing additions, deletions and changes of name of the VLAN through the networks.
A VTP domain is several interconnected switches that share the same VTP environment. Each switch is configured to reside on a single VTP domain.
Copy of a show vtp status
switch # show vtp status
VTP Version: 2
Configuration Revision: 63
Maximum VLANs Supported Locally: 254
Number of existing VLANs: 20
VTP Operating Mode: Client
VTP Domain Name: damian
VTP Pruning Mode: Enabled
VTP V2 Mode: Disabled
VTP Traps Generation: Enabled
MD5 digest: 0 × 38 0 × 3F 0 × 5F 0 × 58 0xB6 0xF0 0 × 74 0 × 30
Configuration last modified by 104.10.2.3 at 04/11/2006 14:49:55