I have a D-Link router.
Recently, my Internet provider switched to automatic address determination. After that, the DNS periodically began to be cut off. He does not come to the corporate portal on IP without problems, he does not find websites by URL. A neighbor advised to reconfigure to automatically determine the address.
I went to the web interface of the router by IP 192.168.0.1 and clicked on the Radio-button, which resembles the automatic determination of the address. After clicking on Submit, the router suggested switching to some other IP. The Internet has earned, but neither on 192.168.0.1, nor on the IP that offered the web interface of the router, you can not go in - stupidly waiting for it to fall off by timeout. Hard reboot and pressing the Reset button on the body of the router did not lead to anything.
Little of. The Internet works for about half an hour, after which it is cut down. If you go to the network connections and fix the connection, it is restored. For half an hour.
What happened and how to deal with it?