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Black Box DeeSL.2 Ethernet Extender
4.3.2 VLAN
Click on VLAN under Advanced
on the main menu to reach the VLAN advanced con-
figuration page.
Figure 14.
VLAN page
VLAN (Virtual Local Area Network)
allows a physical network to be partitioned into
multiple logical networks. Devices on a logical network belong to one group. A device
can belong to more than one group. With VLAN, a device cannot directly talk to or hear
from devices that are not in the same group.
With MTU (Multi-Tenant Unit) applications, VLAN is vital in providing isolation and
security among the subscribers. When properly configured, VLAN prevents one sub-
scriber from accessing the network resources of another on the same LAN.
VLAN also increases network performance by limiting broadcasts to a smaller and
more manageable logical broadcast domain. In traditional switched environments, all
broadcast packets go to each individual port. With VLAN, all broadcasts are confined
to a specific broadcast domain.
You can select from two types of VLAN: 802.1Q Tag-Based VLAN and Port-Based
VLAN. The VLAN Setup screen changes depending on whether you choose 802.1Q
Tag-Based VLAN type or Port Based VLAN type. The IEEE 802.1Q defines the opera-
tion of VLAN bridges that permit the definition, operation, and administration of VLAN
topologies within a bridged LAN infrastructure.
Figure 15. on the following page shows a diagram of possible VLAN connections.
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