10

VLAN

10.1 Overview

This chapter shows you how to configure IEEE 802.1Q tagged VLANs and port- based VLANs.

10.2What 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.

10.3What 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).

 

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GS1510 Series User’s Guide