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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
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Chapter 17 Configuring VLANs
Configuring Normal-Range VLANs
Note You cannot configure an RSPAN VLAN in VLAN database configuration mode.
To return the VLAN name to the default settings, use the no vlan vlan-id name or no vlan vlan-id mtu
VLAN configuration command.
This example shows how to use VLAN database configuration mode to create Ethernet VLAN 20, name
it test20, and add it to the VLAN database:
Switch# vlan database
Switch(vlan)# vlan 20 name test20
Switch(vlan)# exit
APPLY completed.
Exiting....
Switch#
Deleting a VLAN
When you delete a VLAN from a switch that is in VTP server mode, the VLAN is removed from the
VLAN database for all switches in the VTP domain. When you delete a VLAN from a switch that is in
VTP transparent mode, the VLAN is deleted only on that specific switch.
You cannot delete the default VLANs for the different media types: Ethernet VLAN 1 and FDDI or
Token Ring VLANs 1002 to 1005.
Caution When you delete a VLAN, any ports assigned to that VLAN become inactive. They remain associated
with the VLAN (and thus inactive) until you assign them to a new VLAN.
Beginning in privileged EXEC mode, follow these steps to delete a VLAN on the switch by using global
configuration mode:
To delete a VLAN in VLAN database configuration mode, use the vlan database privileged EXEC
command to enter VLAN database configuration mode and the no vlan vlan-id VLAN configuration
command.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
no vlan vlan-id Remove the VLAN by entering the VLAN ID.
Step 3
end Return to privileged EXEC mode.
Step 4
show vlan brief Verify the VLAN removal.
Step 5
copy running-config startup config (Optional) If the switch is in VTP transparent mode, the VLAN
configuration is saved in the running configuration file as well as in
the VLAN database. This saves the configuration in the switch startup
configuration file.
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