Cisco Catalyst 3750 Metro

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Catalyst 3750 Metro Switch Command Reference
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Chapter 2 Catalyst 3750 Metro 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 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 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 enter interface configuration mode:
Switch(config)# interface vlan 23
Switch(config-if)#
You can verify your setting by entering the show interfaces and show interfaces vlan vlan-id privileged
EXEC commands.
vlan-id VLAN number. The range is 1 to 4094.
Release Modification
12.1(14)AX This command was introduced.