Someone can tell me how to implement priority processing for different business ports on OpenWrt 18.06. Such as,there are two types of traffic to be sent on the LAN port, namely port 8888 and port 9999. I hope that the priority of sending traffic on port 9999 is higher than that on port 8888. How should I configure it on OpenWrt? Can it be implemented using/etc/configure/QoS,or another way?