Allied Telesis AT-S25 - Manual (Page 152)

Introduction to Virtual LANs
152
Basic VLAN Mode
The third type of VLAN system support by the AT-8316F Series and AT-
8324 Switches is referred to as the Basic VLAN Mode. When the Basic
VLAN Mode is activated, the switch or stack forwards frames based only
on MAC addresses. All VLAN information, including PVIDs assigned to
ports and VLAN tags in tagged frames, are ignored. Tagged frames are
analyzed only for priority level.
Packets are passed through the switch unchanged. Tagged and
untagged frames egress the switch the same as they entered, either
tagged or untagged, regardless of the type of port on which the frame is
received or transmitted.
You cannot create or modify VLANs when the Basic VLAN Mode is
activated, and the Virtual LAN/QOS selection is removed from the Omega
Main Menu. The configurations of any pre-existing VLANs are retained in
the event you later disabled Basic VLAN Mode, but the VLAN
configurations are not used.
For instructions on how to enable or disable the Basic VLAN Mode, refer
to Activating or Deactivating the Basic VLAN Mode on page 107 in
Chapter 5.