D-Link xStack DGS-3600 Series User Manual - Qos Scheduling Mechanism
xStack DGS-3600 Series Layer 3 Gigabit Ethernet Managed Switch
QoS Scheduling Mechanism
Figure 9- 3. QoS Output Scheduling window
The
Scheduling Mechanism
has the following parameters.
Parameter Description
Strict
The highest class of service is the first to process traffic. That is, the highest class of service
will finish before other queues empty.
Weight fair
Use the weighted round-robin (
WRR
) algorithm to handle packets in an even distribution in
priority classes of service.
Click
Apply
to implement changes made.
QoS Output Scheduling
Changing the output scheduling used for the
hardware queues in the Switch can customize QoS.
As with any changes to QoS implementation, careful
consideration should be given to how network traffic
in lower priority queues is affected. Changes in
scheduling may result in unacceptable levels of
packet loss or significant transmission delay. If the
user chooses 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
QoS
folder,
click
QoS Scheduling Mechanism
, to view the
window shown below.
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
QoS
folder click
QoS Output
Scheduling
, to view the screen shown below.
Figure 9- 4. QoS Output Scheduling 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.
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