Solution to HyperV Virtual Machine 1 network performance problems

Recently, When I configured some windows server 2008 r2 server HyperV virtual machines, there was a network performance problem, that is, the server that configured the HyperV virtual network card, when copying large files from other servers through a virtual Nic, the network may be disconnected and inaccessible. You can connect to the device only after you disable and re-enable the corresponding Nic In the Device Manager or restart the system. By searching through the network, you can find that changing the advanced settings of the Broadcom Nic integrated on the motherboard from Enable to Disable can solve the problem. So I tried and solved it.