DXS-3350SR Gigabit Layer 3 Switch
Configuring The Combination Queue
Utilizing the
QoS Output Scheduling Configuration
window shown above, the DXS-3350SR can implement a
combination queue for forwarding packets. This combination queue allows for a combination of strict and weight-fair
(weighted round-robin
“
WRR
”
) scheduling. To set the combination queue, enter a 0 for the Max Packets entry of the
corresponding priority queues listed in the window above. Priority queues that have a
0
in the
Max Packet
field will
forward packets with strict priority scheduling. The remaining queues, that do not have a
0
in their
Max Packet
field, will
follow a weighted round-robin (
WRR
) method of forwarding packets — as long as the priority queues with a
0
in their
Max
Packet
field are empty. When a packet arrives in a priority queue with a
0
in its
Max Packet
field, this queue will
automatically begin forwarding packets until it is empty. Once a priority queue with a
0
in its
Max Packet
field is empty,
the remaining priority queues will reset the weighted round-robin (
WRR
) cycle of forwarding packets, starting with the
highest available priority queue. Priority queues with an equal level of priority and equal entries in their
Max Packet
field
will empty their fields based on hardware priority scheduling. The
Max Packet
parameter allows you to specify the
maximum number of packets a given priority queue can transmit per weighted round-robin (
WRR
) scheduling cycle. This
provides for a controllable CoS behavior while allowing other queues to empty as well. A value between 0 and 15 packets
can be specified per priority queue to create the combination queue.
The example window below displays an example of the combination queue where Class-1 will have a strict priority for
emptying its queue, while the other classes will follow a weight fair scheduling.
Figure 6- 45. QoS Output Scheduling Configuration window – Combination queue example
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Summary of Contents for xStack DXS-3350SR
Page 114: ...DXS 3350SR Gigabit Layer 3 Switch Figure 6 56 Access Profile Configuration IP 105 ...
Page 118: ...DXS 3350SR Gigabit Layer 3 Switch Figure 6 59 Access Rule Configuration window IP window 109 ...
Page 125: ...DXS 3350SR Gigabit Layer 3 Switch Figure 6 66 Access Rule Display Packet Content 116 ...
Page 129: ...DXS 3350SR Gigabit Layer 3 Switch Figure 6 70 Second 802 1X Authenticator Settings menu 120 ...
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