PLANET WGSW-5242 - Manual (Page 61)

User’s Manual of WGSW-5242
61
4.4.4 VLAN Setting
The VLAN Setting screen contains fields for configuring ports to a VLAN. The port default VLAN ID (PVID) is configured on the
Create VLAN screen. All untagged packets arriving to the device are tagged by the ports PVID. The VLAN Settings screen
contains a Port Table for VLAN parameters for each port. Ports are assigned VLAN membership by selecting and configuring
the presented configuration options, you can refer to Figure 4-4-2 .
Figure 4-4-2
VLAN Setting Screenshot
Understand nomenclature of the Switch
■ IEEE 802.1Q Tagged and Untagged
Every port on an 802.1Q compliant switch can be configured as tagged or untagged.
• Tagged: Ports with tagging enabled will put the VID number, priority and other VLAN information into the
header of all packets that flow into those ports. If a packet has previously been tagged, the port
will not alter the packet, thus keeping the VLAN information intact. The VLAN information in the
tag can then be used by other 802.1Q compliant devices on the network to make
packet-forwarding decisions.
• Untagged: Ports with untagging enabled will strip the 802.1Q tag from all packets that flow into those
ports. If the packet doesn't have an 802.1Q VLAN tag, the port will not alter the packet. Thus,
all packets received by and forwarded by an untagging port will have no 802.1Q VLAN
information. (Remember that the PVID is only used internally within the Switch). Untagging is
used to send packets from an 802.1Q-compliant network device to a non-compliant network