the usual is:
— problems with the definition of the mode of priemoperedachy (duplex and speed)
— bad/ no category patch cord
— a weak rendering of router/switch
try to test the speed between the machines directly, change the cable
Common causes of connectivity problems are as follows:
* Network adapters and switch ports have mismatching duplex levels or transfer speed settings.
* Network adapters or switches with transmission rates of 10/100 megabits per second (Mbps) do not switch over correctly.
* Autosense Some settings may not correctly detect the speed of some network adapters.
* The network adapter is incompatible with the motherboard or other hardware or software components and drivers.