Cisco Systems 3130 VTP Configuration Guidelines

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Cisco Catalyst Blade Switch 3130 for Dell Software Configuration Guide

OL-13270-01

Chapter13 Configuring VTP

Configuring VTP

You can configure all VTP parameters in VLAN database configuration mode, which you access by

entering the vlan database privileged EXEC command. For more information about available keywords,

see the vtp VLAN database configuration command description in the command referenc e for this

release. When you enter the exit command in VLAN database configuration mode, it applies all the

commands that you entered and updates the VLAN database. VTP messages are sent to other switche s

in the VTP domain, and the privileged EXEC mode prompt appears.

If VTP mode is transparent, the domain name and the mo de (transparent) are saved in the switch running

configuration, and you can save this information in the switch startup configuration file by en tering the

copy running-config startup-config privileged EXEC command.

VTP Configuration Guidelines

These sections describe guidelines you should follow when implementing VTP in your network.

When configuring VTP for the first time, you must always assign a domain name. You must configure

all switches in the VTP domain with the same domain name. Switches in VTP transparent mode do not

exchange VTP messages with other switches, and you do not need to configure a VTP domain name

for them.

Note If NVRAM and DRAM storage is sufficient, all switches in a VTP domain should be in VTP server

mode.

Caution Do not configure a VTP domain if all switches are operating in VTP client mode. If you configure the

domain, it is impossible to make changes to the VLAN configuration of that domain. Make sure that you

configure at least one switch in the VTP domain for VTP server mode.

You can configure a password for the VTP domain, but it is not required. If you do configure a domain

password, all domain switches must share the same password and you must configure the password on

each switch in the management domain. Switches without a password or with the wrong password reject

VTP advertisements.

If you configure a VTP password for a domain, a switch that is booted without a VTP configuration does

not accept VTP advertisements until you configure it with the correct password. After the configur ation,

the switch accepts the next VTP advertisement that uses the same password and domain name in the

advertisement.

If you are adding a new switch to an existing network with VTP capability, the new switch learns the

domain name only after the applicable password has been configured on it.

Caution When you configure a VTP domain password, the management domain does not functi on properly if you

do not assign a management domain password to each switch in the domain.