If the network is disconnected because of IP problems, just reconnect, and the IP will change (preferably for a long time).

If it's an ID card, that's your problem.

I don't know the login address of your router (if you are routing at home)

Disconnect and reconnect after boarding.

Or turn off the route and connect yourself.

If it is in other situations, such as in a community or an Internet cafe, find the main server. ...