Chapter 27 Application Patrol

Figure 298 Bandwidth Management Behavior

1000 kbps

BWM

1000 kbps

 

1000 kbps

27.4.5.1 Configured Rate Effect

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.

Table 108 Configured Rate Effect

POLICY

CONFIGURED RATE

MAX. B. U.

PRIORITY

ACTUAL RATE

A

300 kbps

No

1

300 kbps

 

 

 

 

 

B

200 kbps

No

1

200 kbps

 

 

 

 

 

27.4.5.2 Priority Effect

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.

Table 109

Priority Effect

 

 

 

POLICY

 

CONFIGURED RATE

MAX. B. U.

PRIORITY

ACTUAL RATE

A

 

800 kbps

Yes

1

800 kbps

 

 

 

 

 

 

B

 

1000 kbps

Yes

2

200 kbps

 

 

 

 

 

 

27.4.5.3 Maximize Bandwidth Usage Effect

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 110 Maximize Bandwidth Usage Effect

POLICY

CONFIGURED RATE

MAX. B. U.

PRIORITY

ACTUAL RATE

A

300 kbps

Yes

1

550 kbps

 

 

 

 

 

B

200 kbps

Yes

2

450 kbps

 

 

 

 

 

 

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ZyWALL USG 1000 User’s Guide