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Bandwidth Management
16.1 Demands
1. PC1_1 is downloading the MP3 files from the FTP Server. This occupies the bandwidth of PC1_2 who is watching the
video provided by the Web Server, causing the video to be blocked and to have poor quality.
2. WAN_PC is downloading the files from Web Server, causing the blocking of the VPN transfer from LAN_1 to LAN_2.
16.2 Objectives
1. Guarantee the video quality of the PC1_2 (192.168.40.2). The remaining bandwidth can be utilized by the PC1_1
(192.168.40.1) to download the mp3 files from FTP Server (140.113.179.3). However, when the movie is over, the whole
bandwidth can be utilized by the PC1_1.
2. Reserve at least 1Mbps for the LANa-to-LANb transfer. The others can share the remaining 463kbps. However, when the
LANa-to-LANb traffic has only 300kbps, the others can occupy the bandwidth up to (1003kbps - 300kbps) + 463kbps.
16.3 Methods
1. Partition the inbound bandwidth (1.544Mbps) into two classes, the FTP and the Video classes. Set the Video class to obtain
the 447kbps and set it to be able to be borrowed to others. Set the FTP class to obtain 1019kbps.
2. Partition the outbound bandwidth (1.544Mbps) into two classes, the LANa-to-LANb and the Others classes. Set the
LANa-to-LANb to obtain 1Mbps and set it to be able to be borrowed to Others. Set the others class to obtain 463kbps.
This chapter introduces bandwidth management and explains how to implement it.
Figure 16-1 Use bandwidth management mechanism to shape the data flow
Bandwidth Management
89
DFL-900 User Manual
Chapter 16
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