On Wed, Jul 6, 2022 at 10:03 AM Sven Schwermer via networkmanager-list < networkmanager-list@gnome.org> wrote:
> Hi, > > I have a device with cellular modem running a Linux-based OS with > ModemManager/NetworkManager used for the connectivity management. > Occasionally, the cellular connection breaks and it takes several > connection attempts until the connection can be established again. > Currently, we have autoconnect-retries=0 for our cellular connection so > there are infinite retries. This, however, can cause significant system > load if the ModemManager connect (dbus) calls fail immediately which > occasionally happens. > > As far as I understand, NetworkManager will attempt a new autoconnection > attempt right away after the previous attempt failed. The only way of > slowing this down is to set autoconnect-retries=1 which will cause > NetworkManager to wait for 5 minutes between attempts. This wait > duration seems to be fixed. > > Is there a way to make NetworkManager perform a backoff (e.g. linear or > exponential) between connection attempts? Are there any other ways to > guarantee that the cellular modem is "always connected" without having > NetworkManager to loop like crazy when a (re-)connection attempt fails? > > Thanks and best regards, > Sven > Sounds like a device that is going to be remotely controlled over LTE / GSM / CDMA.. If it is unreachable, what does it matter until it comes back up? You will not get to it anyhow :)
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