Luxul XMS-1024P - Manual (Page 65)

65
User Guide
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as if they are in a LAN. However, hosts in different VLANs cannot communicate with
one another directly. Broadcast packets are limited to the ports or hosts assigned to
the same VLAN. Hosts in the same VLAN communicate with one another via Layer
2 (Broadcast Domain), hosts in different VLANs can communicate with one another
through Boundary devices such as Routers or the Layer 3 Switches. The following fi gure
illustrates a simple VLAN implementation.
Figure 6-1 VLAN implementation
VLAN confi gurations enjoy the following advantages.
„
Broadcasts are confi ned to the VLAN. This decreases bandwidth utilization and
improves Network performance.
„
Network security is improved, VLANs cannot communicate with one another directly.
A host in a VLAN cannot access resources in another VLAN directly, Boundary devices
such as Routers or Layer 3 Switches are required.
„
VLANs can be used to group specifi c client devices. When the physical location of a
client device changes, you do not need to change its Network confi guration, simply
make sure the client device is still a member of its original VLAN.
A VLAN can span multiple Switches. This enables client devices in a VLAN to be
dispersed across your entire infrastructure and still maintain isolation. The Switch
supports three VLAN modes, 802.1Q based VLAN, MAC based VLAN and Protocol based
VLAN. VLAN tags are used to allow the Switch to identify packets of different VLANs.