3.Assign the port priority value. The value range is from 0 to 255. The lowest value has higher priority.
4.Click Apply 
button.
SPT – Per Port Configuration interface
Port Mirroring
The Port mirroring is a method for monitor traffic in switched networks. Traffic through ports can be monitored by one specific port. That is, traffic goes in or out monitored ports will be duplicated into mirror port.
1.Port Mirroring State: set mirror mode: Disable, RX, TX, and Both.
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