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Chapter 50 Queuing Method
XGS2220 Series User’s Guide
367
Figure 285 SWITCHING > QoS > Queuing Method (Stacking Mode)
The following table describes the labels in this screen.
Table 179 SWITCHING > QoS > Queuing Method
LABEL DESCRIPTION
SLOT This field appears only in Stacking mode. Click the drop-down list to choose the slot number of the
Switch in a stack.
Port This field displays the port number. In Stacking mode, the first number represents the slot ID and the
second is the port number. Please note that the default stacking ports (the last four ports of your
Switch) cannot be configured. They are reserved for stacking only.
* Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this row first to set the
common settings and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you make them.
Method Select SPQ (Strictly Priority Queuing), WFQ (Weighted Fair Queuing) or WRR (Weighted Round Robin).
Strictly Priority Queuing services queues based on priority only. When the highest priority queue
empties, traffic on the next highest-priority queue begins. Q7 has the highest priority and Q0 the
lowest.
Weighted Fair Queuing is used to guarantee each queue's minimum bandwidth based on their
bandwidth portion (weight) (the number you configure in the Weight field). Queues with larger
weights get more guaranteed bandwidth than queues with smaller weights.
Weighted Round Robin Scheduling services queues on a rotating basis based on their queue weight
(the number you configure in the queue Weight field). Queues with larger weights get more service
than queues with smaller weights.
Weight When you select WFQ or WRR, enter the queue weight here. Bandwidth is divided across the different
traffic queues according to their weights.
Hybrid-SPQ
Lowest-
Queue
This field is applicable only when you select WFQ or WRR.
Select a queue (Q0 to Q7) to have the Switch use SPQ to service the subsequent queues after and
including the specified queue for the port. For example, if you select Q5, the Switch services traffic on
Q5, Q6 and Q7 using SPQ.
Select None to always use WFQ or WRR for the port.
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