ZyXEL Communications ZyWALL 1000 User Manual

 Chapter 27 Application Patrol

ZyWALL USG 1000 User’s Guide

Figure 298   Bandwidth Management Behavior

In the following table the configured rates total less than the available bandwidth and 
maximize bandwidth usage is disabled, both servers get their configured rate.   

Here the configured rates total more than the available bandwidth. Because server A has 
higher priority, it gets up to it’s configured rate (800 kbps), leaving only 200 kbps that server 
B can use.  

With maximize bandwidth usage enabled, after each server gets its configured rate, the rest of 
the available bandwidth is divided equally between the two. So server A gets its configured 
rate of 300 kbps and server B gets its configured rate of 200 kbps. Then the ZyWALL divides 
the remaining bandwidth (1000 - 500 = 500) equally between the two (500 / 2 = 250 kbps for 
each). The priority has no effect on how much of the unused bandwidth each server gets.
So server A gets its configured rate of 300 kbps plus 250 kbps for a total of 550 kbps. Server B 
gets its configured rate of 200 kbps plus 250 kbps for a total of 450 kbps.    

Table 108   Configured Rate Effect

A

300 kbps

No

1

300 kbps

B

200 kbps

No

1

200 kbps

Table 109   Priority Effect

A

800 kbps

Yes

1

800 kbps

B

1000 kbps

Yes

2

200 kbps

Table 110   Maximize Bandwidth Usage Effect

A

300 kbps

Yes

1

550 kbps

B

200 kbps

Yes

2

450 kbps