Chapter 28 Bandwidth Management

Unused bandwidth is divided equally. Higher priority traffic does not get a larger portion of the unused bandwidth.

Bandwidth Management Behavior

The following sections show how bandwidth management behaves with various settings. For example, you configure DMZ to WAN policies for FTP servers A and B. Each server tries to send 1000 kbps, but the WAN is set to a maximum outgoing speed of 1000 kbps. You configure policy A for server A’s traffic and policy B for server B’s traffic.

Figure 280 Bandwidth Management Behavior

1000 kbps

BWM

1000 kbps

 

1000 kbps

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 127 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

 

 

 

 

 

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 for server B.

Table 128

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

 

 

 

 

 

 

456

 

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