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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
interface vlan
interface vlan
Use the interface vlan global configuration command to create or access a dynamic switch virtual
interface (SVI) and to enter interface configuration mode. Use the no form of this command to delete an
SVI.
interface vlan vlan-id
no interface vlan vlan-id
Syntax Description
Defaults The default VLAN interface is VLAN 1.
Command Modes Global configuration
Command History
Usage Guidelines SVIs are created the first time that you enter the interface vlan vlan-id command for a particular VLAN.
The vlan-id corresponds to the VLAN-tag associated with data frames on an ISL or IEEE 802.1Q
encapsulated trunk or the VLAN ID configured for an access port.
Note When you create an SVI, it does not become active until it is associated with a physical port.
If you delete an SVI by entering the no interface vlan vlan-id command, the deleted interface is no
longer visible in the output from the show interfaces privileged EXEC command.
Note You cannot delete the VLAN 1 interface.
You can re-instate a deleted SVI by entering the interface vlan vlan-id command for the deleted
interface. The interface comes back up, but the previous configuration is gone.
The interrelationship between the number of SVIs configured on a switch stack and the number of other
features being configured might have an impact on CPU utilization due to hardware limitations. You can
use the sdm prefer global configuration command to reallocate system hardware resources based on
templates and feature tables. For more information, see the
sdm prefer command.
Examples This example shows how to create a new SVI with VLAN ID 23 and to enter interface configuration
mode:
Switch(config)# interface vlan 23
vlan-id VLAN number. The range is 1 to 4094.
Release Modification
12.1(11)AX This command was introduced.
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