ZyXEL UAG715 User Guide - Page 309

Bandwidth Management Priority, Maximize Bandwidth Usage, Bandwidth Management Behavior

Page 309 highlights

Chapter 26 Bandwidth Management Figure 213 LAN1 to WAN, Outbound 200 kbps, Inbound 500 kbps Outbound 200 kbps Inbound 500 kbps Bandwidth Management Priority • The UAG gives bandwidth to higher-priority traffic first, until it reaches its configured bandwidth rate. • Then lower-priority traffic gets bandwidth. • The UAG uses a fairness-based (round-robin) scheduler to divide bandwidth among traffic flows with the same priority. • The UAG automatically treats traffic with bandwidth management disabled as priority 7 (the lowest priority). Maximize Bandwidth Usage Maximize bandwidth usage allows applications with maximize bandwidth usage enabled to "borrow" any unused bandwidth on the out-going interface. After each application gets its configured bandwidth rate, the UAG uses the fairness- based scheduler to divide any unused bandwidth on the out-going interface amongst applications that need more bandwidth and have maximize bandwidth usage enabled. 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. UAG715 User's Guide 309

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Chapter 26 Bandwidth Management
UAG715 User’s Guide
309
Figure 213
LAN1 to WAN, Outbound 200 kbps, Inbound 500 kbps
Bandwidth Management Priority
The UAG gives bandwidth to higher-priority traffic first, until it reaches its configured bandwidth
rate.
Then lower-priority traffic gets bandwidth.
The UAG uses a fairness-based (round-robin) scheduler to divide bandwidth among traffic flows
with the same priority.
The UAG automatically treats traffic with bandwidth management disabled as priority 7 (the
lowest priority).
Maximize Bandwidth Usage
Maximize bandwidth usage allows applications with maximize bandwidth usage enabled to “borrow”
any unused bandwidth on the out-going interface.
After each application gets its configured bandwidth rate, the UAG uses the fairness- based
scheduler to divide any unused bandwidth on the out-going interface amongst applications that
need more bandwidth and have maximize bandwidth usage enabled.
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.
Inbound
Outbound
500 kbps
200 kbps