Cisco Catalyst 3550

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Catalyst 3550 Multilayer Switch Command Reference
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Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
switchport
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.
switchport
no switchport
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.
Note 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.
Defaults 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.
Examples 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
Note 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.
Release Modification
12.1(4)EA1 This command was introduced.