Enable tagging on the ports before configuring Untagged VLANs.
default encapsulation dot1q
default encapsulation dot1q port {slot/port[/sub-port][-slot/port[/sub-port]][,...]}
encapsulation dot1q
encapsulation dot1q port {slot/port[/sub-port][-slot/port[/sub-port]][,...]}
no encapsulation dot1q
no encapsulation dot1q port {slot/port[/sub-port][-slot/port[/sub-port]][,...]}
Identifies the slot and port in one of the following formats: a single slot and port (slot/port), a range of slots and ports (slot/port-slot/port), or a series of slots and ports (slot/port,slot/port,slot/port). If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port.
None
GigabitEthernet Interface Configuration