Allied Telesis AT-S39 - Manual (Page 132)

Section II: Local and Telnet Management
132
Basic VLAN Mode Overview
The Fast Ethernet switches support a special VLAN configuration
referred to as Basic VLAN Mode. When the Basic VLAN Mode is activated,
frames are forwarded based solely on MAC addresses. All VLAN
information, including PVIDs assigned to ports and VLAN tags in tagged
frames, is ignored. Tagged frames are analyzed only for priority level.
Packets are passed through the switch unchanged. Tagged and
untagged frames exit the switch the same as they entered, either tagged
or untagged.
You can continue to create and modify port-based and tagged VLANs
when the Basic VLAN Mode is activated, but the VLANs are ignored.
Note
For instructions on how to activate the Basic VLAN mode, refer to
Setting the VLAN Mode on page 133.