Why does the Internet disappear through Zyxel Keenetic 4G lll?

Question

WiFi

Hello everyone, guys, I am again turning to you for help in setting up Internet equipment, now I will try to describe the full picture that is happening at my house ....
In general:
There is a mikrotik rb951g-2hnd to which the Internet comes through Nanostation M5 (Radio Bridge), on Mikrotik it is turned on A DHCP server that distributes from 192.168.18.10 - to 192.168.18.250
Further, a Zyxel Keenetic 4G lll router is connected to it using a wire, which is located in a neighboring house, the wire is inserted into the WAN port and receives an IP address automatically
Zyxel Keenetic 4G lll has a DHCP server enabled which distributes from 192.168.2.10- to 192.168.2.200
Zyxel Keenetic 4G lll is connected to: 1 Nanostation M2 that distributes the Internet to the yard, and 2 more Unifi AP Long Range are connected .....
I can’t understand why, but the Internet works on Zuksel, Unifi and Nanostation MAXIMUM 6 hours, after which either you can connect to the network but there is NO Internet, or it’s even impossible to connect from the Wi-Fi network itself ...
Please help me solve the problem, everything seems primitive and understandable, but I can’t find out what is the reason for the loss of the Internet or the unavailability of the Wi-Fi network

Answer 1

Six hours is most similar to the DHCP address lease time (lease time) configured by default on the mikrotik rb951g-2hnd or on the Zyxel Keenetic 4G III.
Try to manually configure an IP address on the computer from the range 192.168.2.10-….2.200 after the Internet fails and see:
1) whether Keenetik pings;
2) whether mikrotik responds;
3) whether Nanostation M5 responds (which is on the other side of the radio bridge, as I understand it).
It is likely that one of the devices is not requesting an extension of the lease of the address, or the DHCP server is not responding to it. In this case, if everything else works fine, you can enable static routing between network devices on the problematic segment.

Answer 2

просто если я просто перезагружаю zyxel, то интернет на устройствах которые дальше питаются от зукселя начинает нормально работать