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Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
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Chapter17 Configuring VLANs Configuring Normal-Range VLANs
To return the VLAN name to the default settings, use the no vlan name, no vlan mtu, or no remote
span 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:
Step3 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.
Step4 mtu mtu-size (Optional) Change the MTU size (or other VLAN characteristic).
Step5 remote-span (Optional) Configure the VLAN as the RSPAN VLAN for a remote
SPAN session. For more information on remote SPAN, see Chapter25,
“Configuring SPAN and RSPAN.”
Step6 end Return to privileged EXEC mode.
Step7 show vlan {name vlan-name | id vlan-id} Verify your entries.
Step8 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
Command Purpose
Step1 vlan database Enter VLAN database configuration mode.
Step2 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.
Step3 vlan vlan-id mtu mtu-size (Optional) To modify a VLAN, identify the VLAN and change a
characteristic, such as the MTU size.
Step4 exit Update the VLAN database, propagate it throughout the administrative
domain, and return to privileged EXEC mode.
Step5 show vlan {name vlan-name | id vlan-id} Verify your entries.
Step6 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 wel l as in th e
VLAN database. This saves the configuration in the switch startup
configuration file.