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12 Appendix B: Using Base with VLAN Network
In this chapter, we describe how to setup a typical VLAN in the network.
12.1 Introduction
In this chapter, we describe how to setup VLAN to typical network. There are three main stages involved in this
procedure:
a) Configure a VLAN Aware Switch to a specific (un)tagged VLAN ID, so the system can process untagged frames
forwarded to it.
b) Setup the Time Server (NTP Server) and other relevant network servers.
c) Configure the HTTP server in the Base station to access the features in the PBX or system.
VLAN allows administrators to separate logical network connectivity from physical connectivity analogous to
traditional LAN which is limited by its physical connectivity. Normally, users in a LAN belong to a single broadcast
domain and communicate with each other at the Data Link Layer or “Layer 2”. LANs are segmented into smaller units
for each IP subnets and here communication between subnets is possible at the Network Layer or “Layer 3”, using IP
routers.
A VLAN can be described as a single physical network that can be logically divided into discrete LANs that can operate
independently of each other.
An Illustration of using VLANs to create independent broadcast domains across switches is shown below:
The figure above highlights several key differences between traditional LANs and VLANs.
 All switches are interconnected to each other. However, there are three different VLANs or broadcast
domains on the network. Physical isolation is not required to define broadcast domains. If the figure was a
traditional LAN without VLAN-aware switches, all stations would belong to one broadcast domain.
 All switch ports can communicate with one another at the Data Link Layer, if they become members of the
same VLAN.
 The physical location of an end station does not define its LAN boundary.
1. An end station can be physically moved from one switch port to another without losing its “view of the
network”. That is, the set of stations it can communicate with at the Data Link Layer remains the same,
provided that its VLAN membership is also migrated from port to port.
2. By reconfiguring the VLAN membership of the switch port an end station is attached to, you can change
the network view of the end station easily, without requiring a physical move from port to port.