Configuring VTP

Default VTP Configuration

•For VTP version 1 and version 2, if extended-range VLANs are configured on the switch stack, you cannot change VTP mode to client or server. You receive an error message, and the configuration is not allowed. VTP version 1 and version 2 do not propagate configuration information for extended range VLANs (VLANs 1006 to 4094). You must manually configure these VLANs on each device.

Note For VTP version 1 and 2, before you create extended-range VLANs (VLAN IDs 1006 to 4094), you must set VTP mode to transparent by using the vtp mode transparent global configuration command. Save this configuration to the startup configuration so that the switch starts in VTP transparent mode. Otherwise, you lose the extended-range VLAN configuration if the switch resets and boots up in VTP server mode (the default).

•VTP version 3 supports extended-range VLANs. If extended VLANs are configured, you cannot convert from VTP version 3 to VTP version 2.

•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.

Related Topics

Enabling the VTP Version, on page 28

Default VTP Configuration

The following table shows the default VTP configuration.

Table 5: Default VTP Configuration

Feature

VTP domain name

VTP mode (VTP version 1 and version 2)

VTP mode (VTP version 3)

VTP version

MST database mode

VTP version 3 server type

Default Setting

Null

Server

The mode is the same as the mode in VTP version 1 or 2 before conversion to version 3.

Version 1

Transparent

Secondary

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Cisco Systems WSC2960XR48FPSI manual Default VTP Configuration, Feature, Default Setting
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WSC2960XR48FPSI specifications

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