If the network performance is poor. How do I deal with this phenomenon?

1. Please check the cable connected with the Switch.

2. Please check the network environment. To see there is any loop exist or not? If. Yes. Please remove the Ethernet connection cause loop appears.

3. Please check the duplex mode between the connect device (i.e. workstation or switch) and the Switch. Please set the fixed duplex mode on both of device.