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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
vtp (VLAN configuration)
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
receiving the first VTP summary packet on any port that is currently trunking or after configuring a
domain name with the vtp domain command. If the switch receives its domain from a summary
packet, it resets its configuration revision number to zero. After the switch leaves the
no-management-domain state, it can never be configured to reenter it until you clear the NVRAM
and reload the software.
• Domain names are case sensitive.
• After you configure a domain name, it cannot be removed. You can reassign it only to a different
domain.
Follow these guidelines when configuring a VTP password:
• Passwords are case sensitive. Passwords should match on all switches in the same domain.
• When the no vtp password form of the command is used, the switch returns to the no-password
state.
Follow these guidelines when enabling VTP pruning:
• If you enable pruning on the VTP server, it is enabled for the entire management domain.
• Only VLANs included in the pruning-eligible list can be pruned.
• Pruning is supported with VTP Version 1 and Version 2.
Follow these guidelines when enabling VTP Version 2 (v2-mode):
• Toggling the version (v2-mode) state modifies certain parameters of certain default VLANs.
• Each VTP switch automatically detects the capabilities of all the other VTP devices. To use VTP
Version 2, all VTP switches in the network must support Version 2; otherwise, you must configure
them to operate in VTP Version 1 (no vtp v2-mode).
• If all switches in a domain are VTP Version 2-capable, you need only to enable VTP 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 or configuring a Token Ring bridge relay
function (TrBRF) or Token Ring concentrator relay function (TrCRF) VLAN media type, VTP
Version 2 (v2-mode) must be enabled.
• If you are configuring a Token Ring or Token Ring-NET VLAN media type, you must use VTP
Version 1.
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