Default VTP Configuration

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VTP Versions

VTP has three versions, 1, 2, and 3. Only one VTP version is allowed in a VTP domain. The default is VTP version 1. A Cisco 2960 switch supports VTP version 2, but it is disabled. A discussion of VTP versions is beyond the scope of this course.
Displaying the VTP Status
Switch#show vtp status
VTP Version                        : 2
Configuration Revision            : 0
Maximum VLANs supported locally : 255
Number of existing VLANs          : 5
VTP Operating Mode                : Server
VTP Domain Name                :
VTP Pruning Mode                  : Disabled
VTP V2 Mode                      : Disabled
VTP Traps Generation            : Disabled
MD5 digest                        : 0x7D 0x5A 0xA6 0x0E 0x9A 0x72 0xA0 0x3A
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
Local updater ID is 0.0.0.0 (no valid interface found)

The figure shows how to view the VTP settings for a Cisco 2960 switch, S1. The Cisco IOS command show VTP status displays the VTP status. The output shows that switch S1 is in VTP server mode by default and that there is no VTP domain name assigned. The output also shows that the maximum VTP version available for the switch is version 2, and that VTP version 2 is disabled. You will use the show VTP status command frequently as you configure and manage VTP on a network. The following briefly describes the show VTP status parameters:

VTP Version-Displays the VTP version the switch is capable of running. By default, the switch implements version 1, but can be set to version 2.
Configuration Revision-Current configuration revision number on this switch. You will learn more about revisions numbers in this chapter.
Maximum VLANs Supported Locally-Maximum number of VLANs supported locally.
Number of Existing VLANs-Number of existing VLANs.
VTP Operating Mode-Can be server, client, or transparent.
VTP Domain Name-Name that identifies the administrative domain for the switch.
VTP Pruning Mode-Displays whether pruning is enabled or disabled.
VTP V2 Mode-Displays if VTP version 2 mode is enabled. VTP version 2 is disabled by default.
VTP Traps Generation-Displays whether VTP traps are sent to a network management station.
MD5 Digest-A 16-byte checksum of the VTP configuration.
Configuration Last Modified-Date and time of the last configuration modification. Displays the IP address of the switch that caused the configuration change to the database.

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Default VTP Configuration