Quality of Service (QoS) includes the transmission bandwidth, delay, packet loss rate and etc. Increasing network bandwidth, decreasing network delay, and reducing packet losses can improve QoS in network service. You can configure the scheduling mode and port priority of QoS.

1. Go to Switch Configuration > Basic Configuration > QoS > Scheduling Mode to select a scheduling type.
   Figure 1. Scheduling Mode

   NORMAL

   First In First Out (FIFO) mode. Transmit the message coming in first. QoS is not enabled.

   SP

   Strict Priority mode. Transmit the message according to the actual priority configuration.

   WRR

   Weighted Round Robin mode. Transmit the message according to the respective weight for low priority and high priority.

2. Configure the port priority in Port Priority.
   Figure 2. Port Priority
3. Click Save to complete the configuration.