User manual

GS2210 Series User’s Guide
93
CHAPTER 9
VLAN
9.1 Overview
This chapter shows you how to configure 802.1Q tagged and port-based VLANs. The type of screen you
see here depends on the VLAN Type you selected in the Switch Setup screen.
9.1.1 What You Can Do
• Use the VLAN Status screen (Section 9.2 on page 96) to view and search all VLAN groups.
• Use the VLAN Detail screen (Section 9.2.1 on page 97) to view detailed port settings and status of the
VLAN group.
• Use the Static VLAN Setup screen (Section 9.4 on page 98) to configure and view 802.1Q VLAN
parameters for the Switch.
• Use the VLAN Port Setup screen (Section 9.5 on page 100) to configure the static VLAN (IEEE 802.1Q)
settings on a port.
• Use the Subnet Based VLAN Setup screen (Section 9.6 on page 101) to set up VLANs that allow you to
group traffic into logical VLANs based on the source IP subnet you specify.
• Use the Protocol Based VLAN Setup screen (Section 9.7 on page 104) to set up VLANs that allow you
to group traffic into logical VLANs based on the protocol you specify.
• Use the Voice VLAN Setup screen (Section 9.8 on page 106) to set up VLANs that allow you to group
voice traffic with defined priority and enable the switch port to carry the voice traffic separately from
data traffic to ensure the sound quality does not deteriorate.
• Use the MAC Based VLAN Setup screen (Section 9.9 on page 107) to set up VLANs that allow you to
group untagged packets into logical VLANs based on the source MAC address of the packet. This
eliminates the need to reconfigure the switch when you change ports. The switch will forward the
packets based on the source MAC address you setup previously.
• Use the Port-Based VLAN Setup screen (Section 9.10 on page 108) to set up VLANs where the packet
forwarding decision is based on the destination MAC address and its associated port.
9.1.2 What You Need to Know
Read this section to know more about VLAN and how to configure the screens.
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).