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PVID
PVID (Port VLAN ID) is the default VID of the port. When the switch receives an un-VLAN-tagged
packet, it will add a VLAN tag to the packet according to the PVID of its received port and forward
the packets.
When creating VLANs, the PVID of each port, indicating the default VLAN to which the port
belongs, is an important parameter with the following two purposes:
（1） When the switch receives an un-VLAN-tagged packet, it will add a VLAN tag to the packet
according to the PVID of its received port
（2） PVID determines the default broadcast domain of the port, i.e. when the port receives UL
packets or broadcast packets, the port will broadcast the packets in its default VLAN.
Different packets, tagged or untagged, will be processed in different ways, after being received by
ports of different link types, which is illustrated in the following table.
Receiving Packets Forwarding Packets
Port Type
Untagged
Packets
Tagged Packets Untagged Packets
Tagged
Packets
Untagged
The packet will be
forwarded
unchanged.
The packet will
be forwarded
after removing
its VLAN tag
Tagged
When untagged
packets are
received, the
port will add the
default VLAN
tag, i.e. the PVID
of the ingress
port, to the
packets.
If the VID of packet
is allowed by the
port, the packet will
be received.
If the VID of packet
is forbidden by the
port, the packet will
be dropped.
The packet will be
forwarded with the
PVID of egress port
as its VLAN tag.
The packet will
be forwarded
with its current
VLAN tag.
Table 6-1 Relationship between Port Types and VLAN Packets Processing
IEEE 802.1Q VLAN function is implemented on the VLAN Config pages.
6.1.1 VLAN Config
On this page, you can configure the 802.1Q VLAN and its ports.
Choose the menu VLAN→802.1Q VLAN→VLAN Config to lo
ad the following page.
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