Cisco Catalyst 3560X-24P Command Reference Manual page 973

Chapter 2 Catalyst 3750-X and 3560-X Cisco IOS Commands
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
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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 no be configured to re-enter it until you clear the NVRAM and reload the software.
Domain names are case-sensitive.
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After you configure a domain name, it cannot be removed. You can only reassign it to a different
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domain.
Follow these guidelines when setting VTP mode:
The no vtp mode command returns the switch to VTP server mode.
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The vtp mode server command is the same as no vtp mode except that it does not return an error
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if the switch is not in client or transparent mode.
If the receiving switch is in client mode, the client switch changes its configuration to duplicate the
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configuration of the server. If you have switches in client mode, be sure to make all VTP or VLAN
configuration changes on a switch in server mode. If the receiving switch is in server mode or
transparent mode, the switch configuration is not changed.
Switches in transparent mode do not participate in VTP. If you make VTP or VLAN configuration
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changes on a switch in transparent mode, the changes are not propagated to other switches in the
network.
If you change the VTP or VLAN configuration on a switch that is in server mode, that change is
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propagated to all the switches in the same VTP domain.
The vtp mode transparent command disables VTP from the domain but does not remove the
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domain from the switch.
In VTP versions 1 and 2, the VTP mode must be transparent for you to add extended-range VLANs
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or for VTP and VLAN information to be saved in the running configuration file. VTP supports
extended-range VLANs in client and server mode and saved them in the VLAN database.
• With VTP versions 1 and 2, if extended-range VLANs are configured on the switch and you attempt
to set the VTP mode to server or client, you receive an error message, and the configuration is not
allowed. Changing VTP mode is allowed with extended VLANs in VTP version 3.
The VTP mode must be transparent for you to add extended-range VLANs or for VTP and VLAN
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information to be saved in the running configuration file.
VTP can be set to either server or client mode only when dynamic VLAN creation is disabled.
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The vtp mode off command sets the device to off. The no vtp mode off command resets the device
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to the VTP server mode.
Follow these guidelines when setting a VTP password:
Passwords are case sensitive. Passwords should match on all switches in the same domain.
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When you use the no vtp password form of the command, the switch returns to the no-password
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state.
The hidden and secret keywords are supported only in VTP version 3. If you convert from VTP
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version 2 to VTP version 3, you must remove the hidden or secret keyword before the conversion.
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Catalyst 3750-X and 3560-X Switch Command Reference
vtp (global configuration)
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