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9-15
Catalyst 3550 Multilayer Switch Software Configuration Guide
78-11194-03
Chapter 9 Creating and Maintaining VLANs
VLANs in the VTP Database
VLANs in the VTP Database
You can set these parameters when you create a new VLAN or modify an existing VLAN in the VTP
database:
• VLAN ID
• VLAN name
• VLAN type (Ethernet, Fiber Distributed Data Interface [FDDI], FDDI network entity title [NET],
TrBRF, or TrCRF, Token Ring, Token Ring-Net)
• VLAN state (active or suspended)
• Maximum transmission unit (MTU) for the VLAN
• Security Association Identifier (SAID)
• Bridge identification number for TrBRF VLANs
• Ring number for FDDI and TrCRF VLANs
• Parent VLAN number for TrCRF VLANs
• Spanning Tree Protocol (STP) type for TrCRF VLANs
• VLAN number to use when translating from one VLAN type to another
The “Default VLAN Configuration” section on page 9-15 lists the default values and possible ranges for
each VLAN media type.
Token Ring VLANs
Although the Catalyst 3550 switches do not support Token Ring connections, a remote device such as a
Catalyst 5000 series switch with Token Ring connections could be managed from one of the supported
switches. Switches running VTP version 2 advertise information about these Token Ring VLANs:
• Token Ring TrBRF VLANs
• Token Ring TrCRF VLANs
For more information on configuring Token Ring VLANs, see the Catalyst 5000 Series Software
Configuration Guide.
Default VLAN Configuration
Table 9-5 shows the default configuration for Ethernet VLANs.
Note The switch supports Ethernet interfaces exclusively. Because FDDI and Token Ring VLANs are not
locally supported, you only configure FDDI and Token Ring media-specific characteristics for VTP
global advertisements to other switches.