disable the backpressure function for half duplex. If it is enable, it can prevent packets lost in half duplex mode. But it will also reject packets when the network traffic is very heavy and that may cause some network connections fail.
2.Port Setting :
You can set the operation speed, duplex mode from here. If
"Auto_Negotiation" is enable, the settings in speed and duplex will be ignored. If "Auto_Negotiation" is disable, the speed and duplex setting will take effect.