UNICOM Electric SmartGST-2402M - Manual (Page 63)

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In the default configuration, VLAN support is disabled.
NOTE: Restart the Switch after making changes to the VLAN mode.
Support Port-based VLAN
Packets are only passed among members of the same VLAN group. Note: All
unselected ports are treated as belonging to another single VLAN. If the port-based
VLAN is enabled, the VLAN-tagging is ignored.
Tag-based VLAN (IEEE 802.1Q VLAN) Support
Tagged-based VLAN is an IEEE 802.1Q specification standard. Therefore, it is possible
to create a VLAN across devices from different switch venders. IEEE 802.1Q VLAN
uses a technique to insert a “tag” into the Ethernet frames. Each tag contains a VLAN
Identifier (VID) that indicates the VLAN numbers.
Support Protocol-based VLAN
In order for an end station to send packets to different VLANs, it must be capable of
either tagging the packets it sends with VLAN tags or be able to attach to a VLAN-aware
bridge that is capable of classifying and tagging the packets with different VIDs. These
IDs are based on not only default PVID but also on other information about the packet,
such as the protocol.
SmartGST-2402M supports protocol-based VLAN classification by means of built-in
knowledge of layer 2 packet formats used by selected popular protocols, such as Novell
IPX and AppleTalk’s EtherTalk, and some degree of programmable protocol matching
capability.