User's Manual

UTT Technologies Chapter 10 QoS
http://www.uttglobal.com Page 272
10.6.2 Example Two
1. Requirements
In this example, an Internet café has a single Internet connection with uplink bandwidth 50
Mbit/s and downlink bandwidth 100 Mbit/s. And the number of network devices is
approximately 100. The Internet café consists of three areas: Video Area, Online Game
Area, and Common Area. There are 30 hosts in Video Area, 30 hosts in Online Game
Area, and 40 hosts in Common Area. The IP address ranges of the areas are as follows:
Ɣ Video Area: 192.168.16.2~192.168.16.40
Ɣ Online Game Area: 192.168.16.41~192.168.16.80
Ɣ Common Area: the remaining IP addresses
The requirements are as follows: The hosts in Video Area have high bandwidth demand,
the hosts in Online Game Area have mid bandwidth demand, and the hosts in Common
Area have low bandwidth demand (that is, the bandwidth just need to meet the
requirements of web browsing and any other general operation); furthermore, the LAN
userV¶ Web traffic has the highest priority.
2. Analysis
We need to do the following settings:
Ɣ Set the Internet connection¶s Uplink Bandwidth and Downlink Bandwidth to 51200
Kbit/s and 102400 Kbit/s respectively.
Ɣ Enable rate limit and set Capacity to 100 in the QoS > Global Settings page.
Ɣ Create rate limit rule 1 for all the LAN users: Min. Tx Bandwidth is 256 Kbit/s, Min.
Rx Bandwidth is 512 Kbit/s, and Bandwidth Priority is Low. Note that as this rule
has lowest priority, it should be created at first.
Ɣ Create rate limit rule 2 for the hosts in the Online Game Area: Min. Tx Bandwidth is
1 Mbit/s, Min. Rx Bandwidth is 2 Mbit/s, and Bandwidth Priority is Mid.
Ɣ Create rate limit rule 3 for the hosts in the Video Area: Min. Tx Bandwidth is 2 Mbit/s,
Min. Rx Bandwidth is 4 Mbit/s, and Bandwidth Priority is High.
Ɣ Enable preferential forwarding for Web traffic feature in the QoS > APP QoS page.