Interface Vlan; Interface Configuration Mode - Cisco Catalyst 3560-X Command Reference Manual

interface vlan

interface vlan
Syntax Description
Defaults
Command Modes
Command History
Usage Guidelines
Note
Note
Catalyst 3750-X and 3560-X Switch Command Reference
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Use the interface vlan global configuration command on the switch stack or on a standalone switch 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
vlan-id VLAN number. The range is 1 to 4094.
The default VLAN interface is VLAN 1.
Global configuration
Release Modification
12.2(53)SE2 This command was introduced.
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.
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.
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 or 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
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Chapter 2 Catalyst 3750-X and 3560-X Switch Cisco IOS Commands
sdm prefer command.
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