The Bandwidth Management Screen - ZyXEL Communications USG40 User Manual

Priority and Over Allotment of Bandwidth Effect
Server A has a configured rate that equals the total amount of available bandwidth and a higher
priority. You should regard extreme over allotment of traffic with different priorities (as shown here)
as a configuration error. Even though the ZyWALL/USG still attempts to let all traffic get through
and not be lost, regardless of its priority, server B gets almost no bandwidth with this configuration.
Table 163 Priority and Over Allotment of Bandwidth Effect
POLICY
A
B

24.2 The Bandwidth Management Screen

The Bandwidth management screens control the bandwidth allocation for TCP and UDP traffic. You
can use source interface, destination interface, destination port, schedule, user, source, destination
information, DSCP code and service type as criteria to create a sequence of specific conditions,
similar to the sequence of rules used by firewalls, to specify how the ZyWALL/USG handles the
DSCP value and allocate bandwidth for the matching packets.
Click Configuration > BWM to open the following screen. This screen allows you to enable/disable
bandwidth management and add, edit, and remove user-defined bandwidth management policies.
The default bandwidth management policy is the one with the priority of "default". It is the last
policy the ZyWALL/USG checks if traffic does not match any other bandwidth management policies
you have configured. You cannot remove, activate, deactivate or move the default bandwidth
management policy.
Figure 287
The following table describes the labels in this screen. See
information as well.
Table 164
LABEL
Enable BWM
Enable Highest
Bandwidth Priority
for SIP Traffic
Chapter 24 BWM (Bandwidth Management)
CONFIGURED RATE
1000 kbps
1000 kbps
Configuration > Bandwidth Management
Configuration > Bandwidth Management
DESCRIPTION
Select this check box to activate management bandwidth.
Select this to maximize the throughput of SIP traffic to improve SIP-based VoIP call
sound quality. This has the ZyWALL/USG immediately send SIP traffic upon
identifying it. When this option is enabled the ZyWALL/USG ignores any other
application patrol rules for SIP traffic (so there is no bandwidth control for SIP traffic)
and does not record SIP traffic bandwidth usage statistics.
ZyWALL/USG Series User's Guide
MAX. B. U. PRIORITY
Yes 1
Yes 2
Section 24.2.1 on page 413
411
ACTUAL RATE
999 kbps
1 kbps
for more