Connection issue on any release of Linino

[Andrea Rocco Lotronto]

As I wrote in the object of the discussion, Linino has a connection problem that occurs in all the versions of Linino and LininoIO used.

I think it is an OpenWRT heritage, because I have solved the problem using a very old OpenWRT patch 2013.

I will illustrate the problem in short:

The "WAN" port is connected to a network that provides DHCP and an internet connection. After a couple of hours, the default route disappears.

As I wrote before, I have solved using a solution proposed in 2013 in the  OpenWRT forum this is the link https://forum.openwrt.org/viewtopic.php?id=44877