Interface Vlan - Cisco 4500M 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
Command History Release
12.1(8a)EW
12.1(12c)EW
Usage Guidelines
SVIs are created the first time you enter the interface vlan vlan_id command for a particular VLAN.
The vlan_id value 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. 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)#
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
2-110
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.
Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
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