D-Link xStack DGS-3426P User Manual - Qos Output Scheduling

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. Click, 

QoS >

QoS Output Scheduling,

 to view the screen shown below. 

Figure 8- 4. 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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