Cisco Catalyst 3750 Command Reference Manual page 567
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Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
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.
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.
If extended-range VLANs are configured on the switch and you attempt to set the VTP mode to
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server or client, you receive an error message, and the configuration is not allowed.
VTP can be set to either server or client mode only when dynamic VLAN creation is disabled.
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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.
Follow these guidelines when setting VTP pruning:
VTP pruning removes information about each pruning-eligible VLAN from VTP updates if there
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are no stations belonging to that VLAN.
If you enable pruning on the VTP server, it is enabled for the entire management domain for VLAN
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IDs 1 to 1005.
Only VLANs in the pruning-eligible list can be pruned.
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Pruning is supported with VTP Version 1 and Version 2.
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Follow these guidelines when setting the VTP version:
Toggling the Version 2 (v2) mode state modifies parameters of certain default VLANs.
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Each VTP switch automatically detects the capabilities of all the other VTP devices. To use
Version 2, all VTP switches in the network must support Version 2; otherwise, you must configure
them to operate in VTP Version 1 mode.
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If all switches in a domain are VTP Version 2-capable, you need only to configure Version 2 on one
switch; the version number is then propagated to the other Version-2 capable switches in the VTP
domain.
If you are using VTP in a Token Ring environment, VTP Version 2 must be enabled.
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If you are configuring a Token Ring bridge relay function (TrBRF) or Token Ring concentrator relay
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function (TrCRF) VLAN media type, you must use Version 2.
If you are configuring a Token Ring or Token Ring-NET VLAN media type, you must use Version 1.
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You cannot save password, pruning, and version configurations in the switch configuration file.
78-16181-01
vtp (global configuration)
Catalyst 3750 Switch Command Reference
2-541
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