Cisco WS-C3560E-48PD-SF Command Reference - Page 658

switchport mode Chapter 2 Catalyst 3560 Switch Cisco IOS Commands 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. switchport mode {access | dot1q-tunnel | dynamic {auto | desirable} | private-vlan | trunk} no switchport mode {access | dot1q-tunnel | dynamic | trunk} Syntax Description access dot1q-tunnel dynamic auto dynamic desirable private-vlan 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 port as an IEEE 802.1Q tunnel port. 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. See the switchport mode private-vlan command. 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. Defaults The default mode is dynamic auto. Command Modes Interface configuration Command History Release 12.1(19)EA1 12.2(20)SE 12.2(25)SE Modification This command was introduced. The private-vlan keyword was added. The dot1q-tunnel keyword was added. Usage Guidelines A configuration that uses the access, dot1q-tunnel, 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. 2-626 Catalyst 3560 Switch Command Reference 78-16405-05