D-Link xStack DGS-3400 Series, User Manual

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xStack DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch
QoS Output Scheduling
QoS can be customized by changing the output scheduling used for the hardware classes of service in the Switch. As with any
changes to QoS implementation, careful consideration should be given to how network traffic in lower priority classes of service
is affected. Changes in scheduling may result in unacceptable levels of packet loss or significant transmission delay. If choosing to
customize this setting, it is important to monitor network performance, especially during peak demand, as bottlenecks can quickly
develop if the QoS settings are not suitable. In the
Configuration folder open the QoS folder and click QoS Output Scheduling,
to view the screen shown below.
Figure 7- 47. QoS Output Scheduling Configuration window
The following values may be assigned to the QoS classes to set the scheduling.
Parameter Description
Max. Packets
Specifies the maximum number of packets the above specified hardware priority class of service will
be allowed to transmit before allowing the next lowest priority queue to transmit its packets. A value
between 0 and 15 can be specified.
Click Apply to implement changes made.
NOTE: Entering a 0 for the Max Packets field in the QoS Output Scheduling Configuration
window above will create a Combination Queue. For more information on implementation of this
feature, see the next section,
Configuring the Combination Queue.
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