User's Manual

UTT Technologies Chapter 10 QoS
http://www.uttglobal.com Page 257
Chapter 10 QoS
This chapter describes how to control and manage Internet bandwidth of the LAN users,
including global settings, rate limit rule settings and P2P rate limit settings.
10.1 Introduction to Bandwidth Management
10.1.1 Why We Need Bandwidth Management
With the growing popularity of P2P, Internet users are able to quickly download high definition
movies and video clips, massively multiplayer online games, and hundreds of megabytes of
data, also share them with others. But at the same time, as the P2P has the nature of seizing
bandwidth, it can maximize the
consumption of bandwidth, and thus it has been given a
name of ³network vampire´.
Using P2P applications in the LAN will impact the other users
accessing the Internet, even cause network congestion and performance deterioration,
which will ultimately lead to that those users can¶t access the Internet. Therefore, in order
to restrain the aggressive consumption of network resources by P2P applications to
provide a stable and secure network to the users, we need to effectively limit the
maximum bandwidth for the LAN users and applications. However, if we only limit the
maximum bandwidth, the bandwidth will be wasted when the network is idle, which will
undoubtedly greatly reduce bandwidth utilization. To solve this problem, we introduce a
new feature of intelligent bandwidth management on the UTT products to provide users a
more reasonable network bandwidth management solution.
The UTT products support intelligent bandwidth management based on token bucket
algorithm. It allows you to create rate limit rules based on source IP address, destination
IP address, protocol type (TCP, UDP or ICMP), port, schedule, and so on. Through the
user-defined capacity and actual network conditions, the Device will get an idea whether
the network is idle, normal, busy and exhausted; besides, it can flexibly control the upload
and download bandwidth for each LAN host according to the network status and
user-defined rate limit rules. In short, using intelligent bandwidth management feature can
help you truly implement intelligent and flexible bandwidth management.