Interface Vlan - Cisco Catalyst 3750 Command Reference Manual
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interface vlan
interface vlan
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.
Syntax Description
vlan-id
Defaults
The default VLAN interface is VLAN 1.
Command Modes
Global configuration
Command History
Release
12.1(11)AX
Usage Guidelines
You cannot delete the VLAN 1 interface.
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 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.
You can reinstate a deleted SVI by entering the interface vlan vlan-id command for the deleted
interface. The interface comes back up, but much of the previous configuration will be 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
Catalyst 3750 Switch Command Reference
2-98
interface vlan vlan-id
no interface vlan vlan-id
VLAN number. The range is 1 to 4094.
Modification
This command was introduced.
Chapter 2
Catalyst 3750 Switch Cisco IOS Commands
sdm prefer
command.
78-16181-01
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