Nearly daily the internet is disconnected without any apparent cause.

I tried the following (all without cure) :

- Connect with ethernet cable .. tried disable IPV6 .. tried disable automatic
( It reports IP 10.110.33.41, DNS/Gateway 10.110.33.254)
- Connect with wifi .. tried disable IPV6 ... tried disable automatic
( It reports IP 10.110.33.23, DNS/Gateway 10.110.33.254)
- Other (new) router
- Replace ethernet cable

The fastest way to reconnect is unplug /plug the ethernet cable.

Any other suggestions?