Chapter 25 Bandwidth Management Screens
ZyWALL 5/35/70 Series User’s Guide
469
The following table describes the labels in this screen.
Table 141 ADVANCED > BW MGMT > Summary
LABEL DESCRIPTION
Class These read-only labels represent the physical interfaces. Select an interface’s check
box to enable bandwidth management on that interface. Bandwidth management
applies to all traffic flowing out of the router through the interface, regardless of the
traffic’s source.
Note: The WLAN class refers to the Ethernet interfaces in the WLAN
port role. The ZyWALL does not apply bandwidth
management to an installed wireless card's traffic.
Traffic redirect or IP alias may cause LAN-to-LAN or DMZ-to-DMZ traffic to pass
through the ZyWALL and be managed by bandwidth management.
Active Select an interface’s check box to enable bandwidth management on that interface.
Speed (kbps) Enter the amount of bandwidth for this interface that you want to allocate using
bandwidth management. This appears as the bandwidth budget of the interface’s
root class (see Section 25.3 on page 471). The recommendation is to set this speed
to match what the device connected to the port can handle. For example, set the
WAN interface speed to 1000 kbps if the broadband device connected to the WAN
port has an upstream speed of 1000 kbps.
The recommendation is to set this speed to match the interface’s actual
transmission speed. For example, set the WAN interface speed to 1000 kbps if your
Internet connection has an upstream transmission speed of 1 Mbps.
You can set this number higher than the interface’s actual transmission speed. This
will stop lower priority traffic from being sent if higher priority traffic uses all of the
actual bandwidth.
You can also set this number lower than the interface’s actual transmission speed. If
you do not enable Max Bandwidth Usage, this will cause the ZyWALL to not use
some of the interface’s available bandwidth.
Scheduler Select either Priority-Based or Fairness-Based from the drop-down menu to
control the traffic flow.
Select Priority-Based to give preference to bandwidth classes with higher priorities.
With the priority-based scheduler, the ZyWALL forwards traffic from bandwidth
classes according to the priorities that you assign to the bandwidth classes. The
larger a bandwidth class’s priority number is, the higher the priority. Assign real-time
applications (like those using audio or video) a higher priority number to provide
smoother operation.
Select Fairness-Based to treat all bandwidth classes equally. The ZyWALL divides
bandwidth equally among bandwidth classes when using the fairness-based
scheduler; thus preventing one bandwidth class from using all of the interface’s
bandwidth.
Maximize
Bandwidth
Usage
Select this check box to have the ZyWALL divide up all of the interface’s unallocated
and/or unused bandwidth among the bandwidth classes that require bandwidth. Do
not select this if you want to reserve bandwidth for traffic that does not match a
bandwidth class (see Section 25.1.5 on page 467) or you want to limit the speed of
this interface (see the Speed field description).
Apply Click Apply to save your changes back to the ZyWALL.
Reset Click Reset to begin configuring this screen afresh.
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