LevelOne FSW-1671 - Manual (Page 28)

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VLAN Mode: Displays VLAN mode: port based/Tag based VLAN
(a) “Add tag” means the outgoing packet of the selected port will be inserted a
802.1Q tag if the packet received at the source port does not include 802,1Q
tag.
(b) “Don’t care” means the outgoing packet of the selected port keep the original
packet received at the source port.
(c) “Remove tag’’ means the 802.1Q tag of the outgoing packet of the selected port
will be stripped if the incoming packet received at the source packet contains
802.1Q tag.
Note: In tag based VLAN mode, it will show error message as below if you add tag
on the port of the NIC which is not support VLAN tag.