Cisco 4500M Command Reference Manual page 495

Chapter2 Cisco IOS Commands for the Catalyst 4500 Series Switches
If you enter dynamic desirable mode, the interface becomes a trunk interface if the neighboring
interface is set to trunk, desirable , or auto mode.
If you enter specify the dot1q-tunnel keyword, the port is set unconditionally as an 802.1Q tunnel port.
The port becomes inactive if you configure it as a private VLAN trunk port and one of the following
applies:
•
•
If a private port PVLAN association or mapping is deleted, or if a private port is configured as a SPAN
destination, it becomes inactive.
Examples
This example shows how to set the interface to dynamic desirable mode:
Switch(config-if)# switchport mode dynamic desirable
Switch(config-if)#
This example shows how to set a port to PVLAN host mode:
Switch(config-if)# switchport mode private-vlan host
Switch(config-if)#
This example shows how to set a port to private VLAN trunk:
Switch(config-if)# switchport mode private-vlan trunk
Switch(config-if)#
This example shows how to configure a port for an 802.1Q tunnel port:
Switch(config-if)# switchport mode dot1q-tunnel
Switch(config-if)#
You can verify your settings by entering the show interfaces switchport command and examining
information in the Administrative Mode and Operational Mode rows.
Related Commands
show interfaces switchport
switchport
switchport private-vlan host-association
switchport private-vlan mapping
78-16201-01
Port does not have a valid PVLAN association.
Port does not have valid allowed normal VLANs.
Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
switchport mode
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