Token Ring Vlans - Cisco Catalyst 2975 Software Configuration Manual

Chapter 13 Configuring VLANs
These sections contain normal-range VLAN configuration information:
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Token Ring VLANs

Although the switch does 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:
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For more information on configuring Token Ring VLANs, see the Catalyst 5000 Series Software
Configuration Guide.
Normal-Range VLAN Configuration Guidelines
Follow these guidelines when creating and modifying normal-range VLANs in your network:
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OL-19720-02
Token Ring VLANs, page 13-5
Normal-Range VLAN Configuration Guidelines, page 13-5
Configuring Normal-Range VLANs, page 13-6
Default Ethernet VLAN Configuration, page 13-6
Creating or Modifying an Ethernet VLAN, page 13-7
Deleting a VLAN, page 13-8
Assigning Static-Access Ports to a VLAN, page 13-9
Token Ring TrBRF VLANs
Token Ring TrCRF VLANs
The switch supports 255 VLANs in VTP client, server, and transparent modes.
Normal-range VLANs are identified with a number between 1 and 1001. VLAN numbers 1002
through 1005 are reserved for Token Ring and FDDI VLANs.
VLAN configuration for VLANs 1 to 1005 are always saved in the VLAN database. If the VTP
mode is transparent, VTP and VLAN configuration are also saved in the switch running
configuration file.
With VTP versions 1 and 2, the switch supports VLAN IDs 1006 through 4094 only in VTP
transparent mode (VTP disabled). These are extended-range VLANs and configuration options are
limited. Extended-range VLANs created in VTP transparent mode are not saved in the VLAN
database and are not propagated. VTP version 3 supports extended range VLAN (VLANs 1006 to
4094) database propagation. If extended VLANs are configured, you cannot convert from VTP
version 3 to version 1 or 2. See the
Before you can create a VLAN, the switch must be in VTP server mode or VTP transparent mode.
If the switch is a VTP server, you must define a VTP domain or VTP will not function.
The switch does not support Token Ring or FDDI media. The switch does not forward FDDI,
FDDI-Net, TrCRF, or TrBRF traffic, but it does propagate the VLAN configuration through VTP.
The switch supports 128 spanning-tree instances. If a switch has more active VLANs than supported
spanning-tree instances, spanning tree can be enabled on 128 VLANs and is disabled on the
remaining VLANs. If you have already used all available spanning-tree instances on a switch,
adding another VLAN anywhere in the VTP domain creates a VLAN on that switch that is not
running spanning-tree. If you have the default allowed list on the trunk ports of that switch (which
"Configuring Extended-Range VLANs" section on page
Catalyst 2975 Switch Software Configuration Guide
Configuring Normal-Range VLANs
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