Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 352)

Switching Introduction
Software Reference for x310 Series Switches
14.10 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
A port can transmit VLAN-tagged frames for any VLAN to which the port belongs. A port
can transmit untagged frames for any VLAN for which the port is configured, e.g. IP
subnet-based or protocol-based, unless prevented by the port-based VLAN egress rules. A
port that belongs to a port-based VLAN can transmit untagged packets for only one VLAN.
For more information about VLANs and VLAN tagging, see
Chapter 16, VLAN
Introduction .
For more information on port tagging see the following commands:
switchport mode access command on page 17.15
switchport mode trunk command on page 17.21