Vtp Version; Configuration Requirements; Configuring A Vtp Server - Cisco Catalyst 2950 Software Configuration Manual

Chapter 17 Configuring VTP

VTP Version

Follow these guidelines when deciding which VTP version to implement:
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Configuration Requirements

When you configure VTP, you must configure a trunk port so that the switch can send and receive VTP
advertisements. For more information, see the
If you are configuring VTP on a cluster member switch to a VLAN, use the rcommand privileged EXEC
command to log into the member switch. For more information about the command, see the command
reference for this release.
If you are configuring extended-range VLANs on the switch, the switch must be in VTP transparent
mode.

Configuring a VTP Server

When a switch is in VTP server mode, you can change the VLAN configuration and have it propagated
throughout the network.
Note If extended-range VLANs are configured on the switch, you cannot change VTP mode to server. You
receive an error message, and the configuration is not allowed.
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All switches in a VTP domain must run the same VTP version.
A VTP version 2-capable switch can operate in the same VTP domain as a switch running VTP
version 1 if version 2 is disabled on the version 2-capable switch (version 2 is disabled by default).
Do not enable VTP version 2 on a switch unless all of the switches in the same VTP domain are
version-2-capable. When you enable version 2 on a switch, all of the version-2-capable switches in
the domain enable version 2. If there is a version 1-only switch, it does not exchange VTP
information with switches with version 2 enabled.
If there are TrBRF and TrCRF Token Ring networks in your environment, you must enable VTP
version 2 for Token Ring VLAN switching to function properly. To run Token Ring and Token
Ring-Net, disable VTP version 2.
"Configuring VLAN Trunks" section on page
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Configuring VTP
16-14.
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