Cisco 2950G 24 Software Configuration Guide - Page 377
VTP Version, Configuration Requirements, Configuring a VTP Server
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Chapter 15 Configuring VTP Configuring VTP VTP Version Follow these guidelines when deciding which VTP version to implement: • 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. 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 "Configuring VLAN Trunks" section on page 14-15. 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, refer to 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. Beginning in privileged EXEC mode, follow these steps to configure the switch as a VTP server: Step 1 Step 2 Step 3 Command configure terminal vtp mode server vtp domain domain-name Purpose Enter global configuration mode. Configure the switch for VTP server mode (the default). Configure the VTP administrative-domain name. The name can be from 1 to 32 characters. All switches operating in VTP server or client mode under the same administrative responsibility must be configured with the same domain name. 78-14982-01 Catalyst 2950 Desktop Switch Software Configuration Guide 15-9
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