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5.2.4 Port-based Priority
Port priority is a priority level of the port. After port priority is configured, the data stream will be mapped to the egress
queues directly according to the priority level of the port.
Choose the menu Configuration →QoS →Port-based Priority to load the following page.
Figure 5-2-4
1. Displays the physical port number of the switch.
2. Select the desired port to configure its priority.
3. Specify the priority for the port.
5.2.5 Packet Scheduling
When the network is congested, the problem that many packets compete for resources must be solved, usually in the way
of queue scheduling. The switch implements eight scheduling queues.
SP-Mode: Strict-Priority Mode. In this mode, the queue with higher priority will occupy the whole bandwidth. Packets in
the queue with lower priority are sent only when the queue with higher priority is empty. The switch has four egress
queues labeled. The disadvantage of SP queue is that: if there are packets in the queues with higher priority for a long
time in congestion, the packets in the queues with lower priority will be “starved to death” because they are not served.
WFQ-Mode: Weighted fair queueing (WFQ) is a method of automatically smoothing out the flow of data in
packet-switched communication networks by sorting packets to minimize the average latency and prevent exaggerated
discrepancies between the transmission efficiency afforded to narrowband versus broadband signals. In WFQ, the priority
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