User's Manual

SME VoIP System Guide, Version 1.5
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Chapter: VLAN Setup Management
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12 VLAN Setup Management
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:
1) Configure a VLAN Aware Switch to a specific (un)tagged VLAN ID, so the SME system can process
untagged frames forwarded to it.
2) Setup the Time Server (NTP Server) and other relevant network servers.
3) Configure the HTTP server in relevant Base stations to access the features in the PBX or SME
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.