Switching between networks from LAN to wifi?

Question

Computer networks

Good afternoon!
There is a wired network with access to the terminal Internet.
There is a USB wifi adapter with which we bypass the terminal Internet.
How can you quickly switch between them, because in order for the whistle to work, you have to bang the wired connection on behalf of the admin so that the waffle works

Answer 1

write and add a script to the scheduler that pings an address on the Internet and, if it is not available, changes the default route to wifi. True, there may be difficulties with the restoration of the channel and the transition back. But as a thought...