Specifications

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0XO(15.1(1)XO)

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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

interface vlan

To create or access a Layer 3 switch virtual interface (SVI), use the interface vlan command. To delete

an SVI, use the no form of this command.

interface vlan vlan_id

no interface vlan vlan_id

Syntax Description

Defaults F ast Et herChannel i s no t specifie d.

Command Modes Global c onfiguratio n mode

Usage Guidelines T he SVIs are created the first time that you enter the interface vlan vlan_id command for a particular

VLAN. The vlan_id value corresponds to the VLAN tag that is associated with the data frames on an

ISL or 802.1Q-encapsula ted trunk or the VLAN ID that is config ured for an access port . A message is

displayed whenever a VLAN interface is newly created, so you can check that you entered the correct

VLAN number.

If you delete an SVI by entering the no interface vlan vlan_id command, the associated interface is

forced into an administrative down state and marked as deleted. The deleted interface will no longer be

visible in a show interface 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.

Examples This example shows the output when you enter the interface vlan vlan_id command for a new VLAN

number:

Switch(config)# interface vlan 23

% Creating new VLAN interface.

Switch(config)#

vlan_id Number of the VLAN; valid values are from 1 to 4094.