The network connection has been disconnected

Hi
I have a mesa 7i96s. I had a working ethernet connection to it until I didn't. I changed nothing. After a restart, I could no longer retain connection. When I ping 10.10.10.10 it works while it's "connecting to it" while "the symbol for the connection is spinning and then disconnecting. I saw that I can't have wifi and the Lan at the same time so I unticked wifi, but still had this problem. I am on a laptop and am booting from USB. I reflashed the USB with the Debian iso but have the same problem. . Any ideas?  .

I will bring a PC today and just do a clean install and see if that works. Maybe as the PC will not inherently have wifi it won't cause this problem>? The cable works fine as you can see I can ping it for some time while its re-connecting.
I will buy a new USB as well as for some reason it was not booting the last time and re-flashing worked. 

Ahh. I guess after restarting it multiple times I got I started mistyping it. But now Even when I type it properly I get the network is unreachable and the top right corner is constantly spinning (trying to connect). While it's trying to connect I am getting ping and "mesaflash --device 7i96 --addr 10.10.10.10 --readhmid" works too. but when it gives up and top right stops swirling and just shows 2 monitors with a cross I get unreachable. While its trying to connect the ping stays for a minute or so.

I tried sudo ethtool -C eth0 rx-usecs 0 but am getting ethtool commadn not found

I think I fixed it. thank you.

On IPv4 Settings TAB Method should be Manual and DNS servers blank.

Give it a try.

Haha. yea that was the problem. I am so embarrassed. I followed the tutorial properly but after rebooting 100 times I started missing stuff. Now I installed the linux on the drive and the settings are set and saved. No more re setting the network settings or anything. Thank you :3