Please see URL
http://www.cisco.com/en/US/tech/tk389/tk689/technologies_configuration_example09186a0080890607.shtml
In global configuration mode:
In Cisco IOS Software global configuration mode, you can configure all VTP parameters with Cisco IOS Software commands. This is the command format:
Router(config)#vtp ?
domain Set the name of the VTP administrative domain.
file Configure IFS filesystem file where VTP configuration is stored.
interface Configure interface as the preferred source for the VTP IP updater
address.
mode Configure VTP device mode
password Set the password for the VTP administrative domain
pruning Set the administrative domain to permit pruning
version Set the administrative domain to VTP version
