Problem: Depends on permanently - solution

I use the device in a fairly large network and have 8 of them in operation.
They run in bridge mode, because I necessarily need the MAC addresses of the clients at the Hotspot server,
so all is well.
Supplied is thus quite a large building with a LTE access and approximately 60 clients (phones, tablets, laptops)

Now I had also the problem that the devices have hung regularly daily.
For the time being it did the Ping Watchdog, with whom I have forced a reboot every 8 hours.
Still, I had to regularly reboot the device manually.

In many forums is talk of overflowing NAT Tabels and broadcast flooding.
Eventually I was able to solve the problem by not'm running in Mixed Mode the WLAN, but it was limited to 802.11g. 802.11n would go, but there are also older devices in the network that do not support this standard.
The network is now running in 802.11g mode (54Mbit), since the LTE access brings 50 Mbit and each user is limited to one way or 2Mbit.

The devices are now running stable and without crashes.

At home, I would go to 11n, since I use no older devices and therefore prefer the full range would be used.

I hope I could help some people, so that networks run smoothly! :)