Interface Vlan - Cisco Catalyst 4500 Series Command Reference Manual

interface vlan

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.
Syntax Description
vlan_id
Defaults Fast EtherChannel is not specified.
Command Modes Global configuration mode
Command History Release
12.1(8a)EW
12.1(12c)EW
Usage Guidelines The 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-encapsulated trunk or the VLAN ID that is configured 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)#
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interface vlan vlan_id
no interface vlan vlan_id
Number of the VLAN; valid values are from 1 to 4094.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Support for extended addressing was added.
Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
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