GS1510 Series User’s Guide
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CHAPTER 10
VLAN
10.1 Overview
This chapter shows you how to configure IEEE 802.1Q tagged VLANs and port-
based VLANs.
10.2 What You Can Do
•Use the Port Isolation screen (Section 10.4 on page 64) to specify which ports
can communicate with each other.
•Use the VLAN Settings screen (Section 10.5 on page 67) to configure a VLAN
and assign member ports.
•Use the Tag Settings screen (Section 10.6 on page 68) to add a VLAN ID tag to
all outgoing frames on a member port.
•Use the Port Settings screen (Section 10.7 on page 69) to configure the VLAN
port settings.
10.3 What You Need to Know
10.3.1 Introduction to IEEE 802.1Q Tagged VLANs
A tagged VLAN uses an explicit tag (VLAN ID) in the MAC header to identify the
VLAN membership of a frame across bridges - they are not confined to the switch
on which they were created. The VLANs can be created statically by hand or
dynamically through GVRP. The VLAN ID associates a frame with a specific VLAN
and provides the information that switches need to process the frame across the
network. A tagged frame is four bytes longer than an untagged frame and
contains two bytes of TPID (Tag Protocol Identifier, residing within the type/length
field of the Ethernet frame) and two bytes of TCI (Tag Control Information, starts
after the source address field of the Ethernet frame).
