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14-9
Catalyst 2950 Desktop Switch Software Configuration Guide
78-14982-01
Chapter 14 Configuring VLANs
Configuring Normal-Range VLANs
Beginning in privileged EXEC mode, follow these steps to use config-vlan mode to create or modify an
Ethernet VLAN:
To return the VLAN name to the default settings, use the no vlan name or no vlan mtu config-vlan
commands.
This example shows how to use config-vlan mode to create Ethernet VLAN 20, name it test20, and add
it to the VLAN database:
Switch# configure terminal
Switch(config)# vlan 20
Switch(config-vlan)# name test20
Switch(config-vlan)# end
Beginning in privileged EXEC mode, follow these steps to use VLAN configuration mode to create or
modify an Ethernet VLAN:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
vlan vlan-id Enter a VLAN ID, and enter config-vlan mode. Enter a new VLAN ID
to create a VLAN, or enter an existing VLAN ID to modify a VLAN.
Note The available VLAN ID range for this command is 1 to 1005
when the SI is installed and 1 to 4094 when the EI is installed;
do not enter leading zeros. For information about adding VLAN
IDs greater than 1005 (extended-range VLANs), see the
“Configuring Extended-Range VLANs” section on page 14-12.
Step 3
name vlan-name (Optional) Enter a name for the VLAN. If no name is entered for the
VLAN, the default is to append the vlan-id with leading zeros to the
word VLAN. For example, VLAN0004 is a default VLAN name for
VLAN 4.
Step 4
mtu mtu-size (Optional) Change the MTU size (or other VLAN characteristic).
Step 5
end Return to privileged EXEC mode.
Step 6
show vlan {name vlan-name | id vlan-id} Verify your entries.
Step 7
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.
Command Purpose
Step 1
vlan database Enter VLAN configuration mode.
Step 2
vlan vlan-id name vlan-name Add an Ethernet VLAN by assigning a number to it. The range is 1 to
1001; do not enter leading zeros.
If no name is entered for the VLAN, the default is to append the vlan-id
with leading zeros to the word VLAN. For example, VLAN0004 is a
default VLAN name for VLAN 4.
Step 3
vlan vlan-id mtu mtu-size (Optional) To modify a VLAN, identify the VLAN and change a
characteristic, such as the MTU size.