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Catalyst 2950 and Catalyst 2955 Switch Command Reference

OL-10102-02

Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands

vtp (global configuration)

Defaults The default filename is flash:vlan.dat.

The default mode is server mode.

No domain name or password is defined.

No password is configured.

Pruning is disabled.

The default version is version 1.

Command Modes Global configuration

Command History

Usage Guidelines When you save VTP mode and domain name and VLAN configurations in the switch startup

configuration file and reboot the switch, the VTP and VLAN configurations are determined by these

conditions:

• If both the VLAN database and the configuration file show the VTP mode as transparent and the

VTP domain names match, the VLAN database is ignored. The VTP and VLAN configurations in

the startup configuration file are used. The VLAN database revision number remains unchanged in

the VLAN database.

• If the startup VTP mode is server mode, or the startup VTP mode or domain names do not match the

VLAN database, the VTP mode and VLAN configuration information for the first 1005 VLAN IDs

are determined by VLAN database information, and configuration for VLAN IDs greater than 1005

is determined by the switch configuration file.

• If the image on the switch or the configuration file is earlier than Cisco IOS Release 12.1(9)EA1,

the switch reboots using the information in the VLAN database.

The vtp file filename cannot be used to load a new database; it renames only the file in which the existing

database is stored.

Follow these guidelines when configuring a VTP domain name:

• The switch is in the no-management-domain state until you configure a domain name. While in the

no-management-domain state, the switch does not send any VTP advertisements even if changes

occur to the local VLAN configuration. The switch leaves the no-management-domain state after it

receives the first VTP summary packet on any port that is trunking or after you configure a domain

name by using the vtp domain command. If the switch receives its domain from a summary packet,

it resets its configuration revision number to 0. After the switch leaves the no-management-domain

state, it can not be configured to re-enter it until you clear the NVRAM and reload the software.

• Domain names are case-sensitive.

Release Modification

12.0(5.2)WC(1) This command was introduced.

12.1(6)EA2 The if-id keyword was added.

12.1(9)EA1 The domain and mode keywords were added. The if-id keyword was

replaced by the interface keyword.

12.1(11)EA1 The password, pruning, and version keywords were added.

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