Switchport Mode - Cisco Catalyst 3030 Command Reference Manual

switchport mode

switchport mode
Use the switchport mode interface configuration command to configure the VLAN membership mode
of a port. Use the no form of this command to reset the mode to the appropriate default for the device.
Syntax Description access
dynamic auto
dynamic desirable
trunk
Defaults The default mode is dynamic auto.
Command Modes Interface configuration
Command History Release
12.2(25)SEE
Usage Guidelines
A configuration that uses the access or trunk keywords takes effect only when you configure the port in
the appropriate mode by using the switchport mode command. The static-access and trunk
configuration are saved, but only one configuration is active at a time.
When you enter access mode, the interface changes to permanent nontrunking mode and negotiates to
convert the link into a nontrunk link even if the neighboring interface does not agree to the change.
When you enter trunk mode, the interface changes to permanent trunking mode and negotiates to
convert the link into a trunk link even if the interface connecting to it does not agree to the change.
When you enter dynamic auto mode, the interface converts the link to a trunk link if the neighboring
interface is set to trunk or desirable mode.
When you enter dynamic desirable mode, the interface becomes a trunk interface if the neighboring
interface is set to trunk, desirable, or auto mode.
Cisco Catalyst Blade Switch 3030 Command Reference
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switchport mode {access | dynamic {auto | desirable} | trunk}
no switchport mode {access | dynamic | trunk}
Set the port to access mode (either static-access or dynamic-access depending
on the setting of the switchport access vlan interface configuration command).
The port is set to access unconditionally and operates as a nontrunking, single
VLAN interface that sends and receives nonencapsulated (non-tagged) frames.
An access port can be assigned to only one VLAN.
Set the interface trunking mode dynamic parameter to auto to specify that the
interface convert the link to a trunk link. This is the default switchport mode.
Set the interface trunking mode dynamic parameter to desirable to specify that
the interface actively attempt to convert the link to a trunk link.
Set the port to trunk unconditionally. The port is a trunking VLAN Layer 2
interface. The port sends and receives encapsulated (tagged) frames that
identify the VLAN of origination. A trunk is a point-to-point link between two
switches or between a switch and a router.
Modification
This command was introduced.
Chapter 2 Cisco Catalyst Blade Switch 3030 Cisco IOS Commands
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