Gigabyte GN-GSV2401S, Руководство пользователя

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Figure 3.16 VLAN Configuration
There are two most popular VLAN implementation, IEEE 802.1q Tagged VLAN
and Port-based VLAN. GN-GSV2401S supports both VLAN implementation. The
biggest difference between both VLAN implementations is Tagged VLAN can
cross Layer-2 switch but Port-based VLAN can not.
IEEE802.1q VLAN
IEEE 802 Local Area Networks (LANs) of all types may be connected together
with Media Access Control (MAC) Bridges, as specified in ISO/IEC 15802-3. This
standard defines the operation of Virtual LAN (VLAN) Bridges that permit the
definition, operation and administration of Virtual LAN topologies within a Bridged
LAN infrastructure.
There are two key components to understanding IEEE 802.1Q VLANs - Port
VLAN ID numbers (PVID) and VLAN ID numbers (VID). Although both variables
are assigned to a switch port, there are important differences between them.
For instance, a user can only assign one PVID to each switch port. When packets
have to be forwarded to another switch port or somewhere else on the network,
the PVID defines the relevant VLAN recipient.
On the other hand, a user can define a port as a member of multiple VLANs (VIDs)
thus allowing the connected segment to receive packets from many VLANs on the
network.