According to this commit, the netifd now always knows when an interface goes down. This is especially relevant for 2G/3G/4G/5G mobile connections, since mobile providers sometimes perform a provider initiated disconnect. As an example, the german mobile provider o2 (telefonica) is doing so every 24 hours. An automatic reconnect does still not happen. The connection stays disconnected until a manual reconnect is being performed.
Currently, i use watchcat along with a script to restart the interface, when pings to 18.104.22.168 fail. But i feel like this isn't really necessary anymore, because of the mentioned commit.
So, I would like to kindly ask for a little LuCI checkbox in the interface configuration which automatically restarts the interface (ifup), as soon as the underlying network connection goes down.
I hope this feature request would help to reduce the "no-connection" timegap, because pinging external targets like watchcat does, always requires you to wait some time before restarting the interface (ping timeouts can happen for other reasons too).
Thanks folks, i really appreciate your work!