Look into "heartbeat".  It keeps in touch with another server and if the connection is lost you can define action i.e. restart network.

On Sat, Feb 25, 2017 at 10:53 AM, sean darcy <seandarcy2@gmail.com> wrote:
On F25, a server keeps losing its internet connection. I've now added a cron.hourly script to restart NetworkManager. Is there a better way ? Some way to tell NetworkManager that if the connection goes down, it should try to bring it up every ___ seconds ?

sean
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