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TANDBERG Border Controller User Manual
4 Bandwidth Control
The TANDBERG Border Controller allows you to control endpoints’ use of bandwidth on your
network. Figure 4 shows a typical deployment: a broadband LAN, where high bandwidth
calls are acceptable, a pipe to the internet with restricted bandwidth, and two satellite offices,
each with their own restr icted pipes. In order to utilize the available bandwidth efficiently, the
TANDBERG Border Controller allows you to model your network, and bandwidth controls on
individual components of the network. Ba ndw idth controls may be set on a call by call basis and
on a total concurrent usage basis.
Figure 4: Typical network deployment
All endpoints registered with your Border Controller are part of its local zone. As shown in Figure
4, the local zone can contain many different networks with different bandwidth limitations. In
order to model this, the local zone is made up of one or more subzones. When an endpoi nt
registers with the Border Controller it is assigned to a subzone, based on its IP address.
By default all endpoints registering with the Border Controller are assigned to the default subzone.
This is suitable if you have uniform bandwidth available between all your endpoints. When you
have differing bandwidth provision, as in Figure 4, you should create a new subzone for each
pool of endpoints.
Subzones are added and configured t hrough the web interface on the Border Controller Configu-
ration → SubZones page (Figure 5), or through the command line using the following commands:
xConfiguration SubZones SubZone [1..100] Name
xConfiguration SubZones SubZone [1..100] Subnet IP Prefixlength
xConfiguration SubZones SubZone [1..100] Subnet IP Address
Subzones may be configured with links joining them to each other and to other zones. These links
are used to calculate how a call is routed over the network and so which zones and subzones
are involved. If multiple routes are possible, your Border Controller will select the one with the
fewest links.
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