User manual
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wEb-bASED bROwSER MANAGEMENT
VLAN Conguration List: Options range from “VLAN Group 1” to ““VLAN Group
24” (default). Species the VLAN Group No. to congure its members.
VLAN Members: Options range from “Port 1” to “Port 24” and “Trunk 01” to
“Trunk 08” (default: none selected). These are ports that are allowed to be
members of the VLAN. A trunk can be selected as a VLAN member, but a trunk
group needs to be congured rst. NOTE: Model 524063 (24-Port) allows up to
12 member ports per trunk; Model 524087 (16-Port) allows up to 8 member ports
per trunk.
Delete: Click to delete the current VLAN Group conguration.
Modify: Click to complete the current VLAN conguration.
802.1Q VLANS
A virtual LAN, or VLAN, is a group of devices on one or more LAN segments that
communicate as if they were attached to the same physical LAN segment. VLANs
are extremely exible because they are based on logical instead of physical
connections. When VLANs are introduced, all trafc in the network must belong
to one or another VLAN. Trafc on one VLAN cannot pass to another, except
through an intranetwork router or Layer 3 switch. A VLAN tag is the identication
information that is present in frames in order to support VLAN operation.
Tagged vs. Untagged Frames
Tagged frames are frames with 802.1Q (VLAN) tags that specify a valid VLAN
identier (VID). Untagged frames are frames without tags or frames that carry 802.1p
(Prioritization) tags only having prioritization information and a VID of 0. Frames
with a VID of 0 are also called priority-tagged frames. When a switch receives a
tagged frame, it extracts the VID and forwards the frame to other ports in the same
VLAN.
Native VLAN
Each port is assigned a native VLAN number, the port VLAN ID (PVID). When an
untagged frame ingresses a port, it is associated with the port’s native VLAN. By
default, when the switch transmits a frame on the native VLAN, it sends the frame
untagged, but can be congured to transmit frames on the native VLAN tagged.
VLAN Ingress and Egress Rules
Ingress rules are the rules applied to all frames when they are received by the
switch, as indicated below.