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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
OL-10101-02
Chapter 17 Configuring VTP
Configuring VTP
This example shows how to use VLAN configuration mode to configure the switch as a VTP server with
the domain name eng_group and the password mypassword:
Switch# vlan database
Switch(vlan)# vtp server
Switch(vlan)# vtp domain eng_group
Switch(vlan)# vtp password mypassword
Switch(vlan)# exit
APPLY completed.
Exiting....
Configuring a VTP Client
When a switch is in VTP client mode, you cannot change its VLAN configuration. The client switch
receives VTP updates from a VTP server in the VTP domain and then modifies its configuration
accordingly.
Note If extended-range VLANs are configured on the switch, you cannot change VTP mode to client. You
receive an error message, and the configuration is not allowed.
Note If you configure the switch for VTP client mode, the switch does not create the VLAN database file
(vlan.dat). If the switch is then powered off, it resets the VTP configuration to the default. To keep the
VTP configuration with VTP client mode after the switch restarts, you must first configure the VTP
domain name before the VTP mode.
Caution If all switches are operating in VTP client mode, do not configure a VTP domain name. If you do, it is
impossible to make changes to the VLAN configuration of that domain. Therefore, make sure you
configure at least one switch as a VTP server.
Beginning in privileged EXEC mode, follow these steps to configure the switch as a VTP client:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
vtp mode client Configure the switch for VTP client mode. The default setting is VTP
server.
Step 3
vtp domain domain-name (Optional) Enter the VTP administrative-domain name. The name can be
from
1 to 32 characters. This should be the same domain name as the VTP
server.
All switches operating in VTP server or client mode under the same
administrative responsibility must be configured with the same domain
name.
Step 4
vtp password password (Optional) Enter the password for the VTP domain.