Cisco 3200 Series Hardware Reference Manual page 130

VLAN Trunk Protocol (VTP)
VLAN Trunk Protocol (VTP)
VLAN Trunk Protocol (VTP) is a Layer 2 messaging protocol that maintains VLAN configuration
consistency by managing the addition, deletion, and renaming of VLANs within a VTP domain. A VTP
domain (also called a VLAN management domain) is made up of one or more switches that share the
same VTP domain name and that are interconnected with trunks. VTP minimizes configuration errors
and configuration inconsistencies that can result in a number of problems, such as duplicate VLAN
names, incorrect VLAN-type specifications, and security violations.
The FESMIC supports both VTP version 1 and version 2.
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VTP Server Example
The following example shows how to configure the switch as a VTP server:
Router# vlan database
Router(vlan)# vtp server
Setting device to VTP SERVER mode.
Router(vlan)# vtp domain Lab_Network
Setting VTP domain name to Lab_Network
Router(vlan)# vtp password WATER
Setting device VLAN database password to WATER.
Router(vlan)# exit
APPLY completed.
Exiting....
Router#
VTP Client Example
The following example shows how to configure the switch as a VTP client:
Router# vlan database
Router(vlan)# vtp client
Setting device to VTP CLIENT mode.
Router(vlan)# exit
In CLIENT state, no apply attempted.
Exiting....
Router#
Cisco 3200 Series Router Hardware Reference
C-6
VTP server mode—You can create, modify, or delete VLANs and specify other configuration
parameters (such as VTP version and VTP pruning) for the entire VTP domain. VTP servers
advertise their VLAN configuration to other switches in the same VTP domain and synchronize their
VLAN configuration with other switches, based on advertisements received over trunk links. VTP
server is the default mode.
VTP clients mode— Behaves the same way as VTP servers, but you cannot create, change, or delete
VLANs on a VTP client.
VTP transparent mode—Switches do not participate in VTP. A VTP-transparent switch does not
advertise its VLAN configuration and does not synchronize its VLAN configuration based on
received advertisements. However, in VTP version 2, transparent switches do forward VTP
advertisements that they receive out their trunk interfaces.
Appendix C Switch Port Functionality
OL-5816-10