ZyXEL Communications 200 Series - Manual (Page 446)

Chapter 27 Application Patrol
ZyWALL USG 100/200 Series User’s Guide
446
• Inbound traffic is limited to 500 kbs. The connection initiator is on LAN1 so inbound
means the traffic traveling from the WAN to the LAN1.
Figure 355 LAN 1to WAN, Outbound 200 kbps, Inbound 500 kbps
Bandwidth Management Priority
• The ZyWALL gives bandwidth to higher-priority traffic first, until it reaches its
configured bandwidth rate.
• Then lower-priority traffic gets bandwidth.
• The ZyWALL uses a fairness-based (round-robin) scheduler to divide bandwidth among
traffic flows with the same priority.
• The ZyWALL 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 ZyWALL 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 Outbound
500 kbps 200 kbps 200 kbps