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2 forwarding tagged/untagged frames – Planet Technology WGS3-2620 User Manual

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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
tags)

VLAN
1,2,.3
802.1Q

VLAN 1,3
(untagge
d)