ZyXEL Communications ZYWALL USG 20 Manual page 456

Unified security gateway
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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
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
A
B
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
A
B
456
1000 kbps
1000 kbps
CONFIGURED RATE MAX. B. U. PRIORITY
300 kbps
200 kbps
CONFIGURED RATE
MAX. B. U. PRIORITY ACTUAL RATE
800 kbps
1000 kbps
BWM
1000 kbps
ACTUAL RATE
No
1
No
1
Yes
1
Yes
2
ZyWALL USG 20/20W User's Guide
300 kbps
200 kbps
800 kbps
200 kbps

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