SSH Connecting to server X attempted a socket operation on an unreachable network. (os error 10051)

SSH Connecting to server X attempted a socket operation on an unreachable network. (os error 10051). The company network does not have IPv6 enabled. Connecting to a remote IPv6 server is very troublesome. Every time, you have to turn on your mobile phone hotspot to manage it. Suddenly, there is a problem with a good server. SSH Connecting to server X attempted a socket operation on an unreachable network. (os error 10051). Finally, it was found that the mobile phone is connected to the company's WiFi, so there is still no IPv6 address. Solution: Turn off WiFi and turn on the mobile phone hotspot to reconnect to the remote IPv6 server.