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Updated:November 29, 2018
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Quality of Service (QoS) Queue Settings on ESW2-550X Switch
The Quality of Service (QoS) queue in the network device enables the device to handle outgoing traffic from its interface effectively. The switch supports four queues for each interface. Queue number four is the highest priority queue whereas queue number one is the lowest priority queue. Strict Priority and Weighted Round Robin (WRR) are selected from the respective queues to enable both of the scheduling methods. There are two ways of determining how traffic in queues is handled: Strict Priority and WRR. Traffic in a Queue under Strict Priority is sent first followed by the traffic in a Queue under WRR. This article explains how to configure QoS queue settings on ESW2-550X switches.
• ESW2-550X-48DC-R • ESW2-550X-48-R
QoS Queue Settings
Step 1. Log in to the web configuration utility and choose Quality of Service > General > Queue. The Queue page opens:
The Queue Table contains these parameters:
• Queue — Each interface on this switch has four Queues. Queue ranges from 1 to 4.
• Scheduling Methods — Strict Priority and WRR are the two methods by which traffic in the queue can be scheduled. Perform Step 2 and skip Step 3, if the Strict Priority scheduling method is chosen, otherwise skip to Step 3.
Step 2. Click the Strict Priority radio button if traffic from the highest priority queue is to be transmitted first followed by the lower priority queues. Queue 1 has the lowest priority while queue 4 has the highest priority.
Note: Egress traffic from the highest-priority queue is transmitted first. Traffic from the lower queues is processed only after the highest queue has been transmitted. Also each queue can have its own scheduling method.
Step 3. Click the WRR radio button if traffic from the queue is to be sent in proportional to the weight of the queue. In WRR mode the number of packets sent from the queue is proportional to the weight of the queue (the higher the weight the more packets are sent). This means queues are serviced until their quota has been used up and then another queue is serviced.
• WRR Weight — The weight used by each Queue is displayed. The default weight values are 1, 2, 4, and 8 for the Queues ranges from 1 to 4.
• % of WRR Bandwidth — The amount of bandwidth available to each queue is displayed in percentage.