Switchport - Cisco Catalyst 3750 Command Reference Manual

switchport

switchport
Use the switchport interface configuration command with no keywords on the switch stack or on a
standalone switch 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 configured as a Layer 3 interface, you must first enter this switchport command with
Note
no keywords to configure the interface as a Layer 2 port. Then you can enter additional switchport
commands with keywords, as shown on the pages that follow.
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 Release
12.1(11)AX
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
The switchport command without keywords is not used on platforms that do not support Cisco-routed
Note
ports. All physical ports on such platforms are assumed to be Layer 2-switched interfaces.
Catalyst 3750 Switch Command Reference
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switchport
no switchport
Modification
This command was introduced.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
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