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WGS3 Layer 3 Switch User’s Manual
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6.3.2 Forwarding Tagged/Untagged Frames
Ports can be assigned to multiple tagged or untagged VLANs. Each port on the switch is therefore
capable of passing tagged or untagged frames.
To forward a frame from a VLAN-aware device to a VLAN-unaware device, the switch first decides where
to forward the frame, and then strips off the VLAN tag. However, to forward a frame from a
VLAN-unaware device to a VLAN-aware device, the switch first decides where to forward the frame, and
then inserts a VLAN tag reflecting this port’ s default VID.
The default PVID is VLAN 1 for all ports, but this can be changed.
VLAN aware
switch
VLAN aware
switch
VLAN aware
switch
VLAN aware
switch
VLAN aware
switch
VLAN aware
switch
VLAN 1,2
802.1Q
tags
VLAN 1,3
802.1Q
tags
trunk
VLAN 1.2.3
(802.1Q
ta
g
s
)
VLAN
1,2,.3
802.1Q
VLAN 1,3
(untagge
d)