Switchport - Cisco Catalyst 3550 Command Reference Manual

Multilayer switch

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switchport

Use the switchport interface configuration command with no keywords to put an interface that is in

Layer 3 mode into Layer 2 mode for Layer 2 configuration. Use the no form of this command to put an

interface in Layer 3 mode.

Use the no switchport command (without parameters) to set the interface to the routed-interface status

and to erase all Layer 2 configurations. You must use this command before assigning an IP address to a

routed port.

If an interface is to be configured as a Layer 3 interface, you must first enter the switchport command

with no keywords to configure the interface as a Layer 2 port. Then you can enter additional switchport

commands with keywords.

Syntax Description

This command has no arguments or keywords.

By default, all interfaces are in Layer 2 mode.

Command Modes

Interface configuration

Command History

Usage Guidelines

Entering the no switchport command shuts the port down and then re-enables it, which might generate

messages on the device to which the port is connected.

This example shows how to cause an interface to cease operating as a Layer 2 port and become a

Cisco-routed port:

Switch(config-if)# no switchport

This example shows how to cause the port interface to cease operating as a Cisco-routed port and convert

to a Layer 2-switched interface:

Switch(config-if)# switchport

The switchport command without keywords is not used on platforms that do not support Cisco-routed

ports. All physical ports on such platforms are assumed to be Layer 2-switched interfaces.

Catalyst 3550 Multilayer Switch Command Reference

no switchport

Modification

This command was introduced.

Chapter 2 Catalyst 3550 Switch Cisco IOS Commands

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