ZyXEL Communications ZyWALL USG 50 User Manual page 447

• Inbound traffic is limited to 500 kbs. The connection initiator is on the LAN1 so
inbound means the traffic traveling from the WAN to the LAN1.
Figure 271 LAN1 to WAN, Outbound 200 kbps, Inbound 500 kbps
Outbound
200 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
ZyWALL USG 50 User's Guide
Outbound Inbound
500 kbps
200 kbps
Chapter 28 Application Patrol
447