Vlan; Vlan Overview - Planet GS-5220 Series User Manual

4.6 VLAN

4.6.1 VLAN Overview

A Virtual Local Area Network (VLAN) is a network topology configured according to a logical scheme rather than
the physical layout. VLAN can be used to combine any collection of LAN segments into an autonomous user
group that appears as a single LAN. VLAN also logically segment the network into different broadcast domains so
that packets are forwarded only between ports within the VLAN. Typically, a VLAN corresponds to a particular
subnet, although not necessarily.
VLAN can enhance performance by conserving bandwidth, and improve security by limiting traffic to specific
domains.
A VLAN is a collection of end nodes grouped by logic instead of physical location. End nodes that frequently
communicate with each other are assigned to the same VLAN, regardless of where they are physically on the
network. Logically, a VLAN can be equated to a broadcast domain, because broadcast packets are forwarded to
only members of the VLAN on which the broadcast was initiated.
1. No matter what basis is used to uniquely identify end nodes and assign these nodes
VLAN membership, packets cannot cross VLAN without a network device
performing a routing function between the VLANs.
2. The Managed Switch supports IEEE 802.1Q VLAN. The port untagging function can
be used to remove the 802.1 tag from packet headers to maintain compatibility
with devices that are tag-unaware..
The Managed Switch's default is to assign all ports to a single 802.1Q VLAN named
DEFAULT_VLAN. As new VLAN is created, the member ports assigned to the new VLAN
will be removed from the DEFAULT_ VLAN port member list. The DEFAULT_VLAN has a
VID = 1.
This section has the following items:
VLAN Port Configuration

Enables VLAN group
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