ATL LTE18 kit reboots every 5 minutes

Hardware MikroTik hardware general
1

Hello,

I have ATL LTE18 kit mounted on a pole and after a /system reboot command the ATL LTE18 kit did not boot. Since then (almost 24 hours later) the device doesn’t work and seems to reboot itself every 5 minutes. I guess it is the watchdog rebooting it.

The ATL LTE18 kit is connected to ether1 of a hAP ac2 router. The hAP ac2 ether1 status is:

Last Link Down Time Jul/21/2024 04:53:54
Last Link Up Time Jul/21/2024 04:53:36
Link Downs 281

After every 5 minute reboot the ether1 of the ATL LTE18 kit is up for around 18 seconds.

What might be the problem?
Is there a solution that doesn’t include climbing the pole?

And no, I did not do any modifications of the firmware or the configuration prior to the reboot. I was diagnosing a firewall issue and I wanted to make sure I clear all active connections - that is why I did the reboot.

Thanks in advance!

2

What does the log for the ATL LTE18 kit say?

3

Thank you for asking. I don’t know because I cannot login to the LTE kit. I will edit my question.

4

It’s very difficult to say. We need to look at your configuration and would like to know what is written in the logs

5

I just managed to do a torch on the interface of the hAP ac2. There is no single packet received from the LTE kit during the 15-17 seconds window that the ethernet interface is up. I guess the device is in a bad state and cannot boot at all.

6

How do you power the ATL? Try to use a different power source (e.g. another power adapter), power adapters can go bad after some time due to low quality capacitors, some PAs fare worse than others.

The worse possibility is that you upgraded routerboot firmware some time ago but you didn’t reboot device at that time … but upgrade went wrong and it only presented as such after first reboot. In this case you’ll have to climb if only to press the button to initiate boot through backup routerboot (and then try to flash routerboot again).

And the third possibiliry, which will require netinstall to recover: your flash storage ran out of free space (16MB for v7 on ARM is pretty tight) and config got borked on the permanent storage (device works fine until reboot, the config copy in RAM is fine).

7

Thank you for your suggestion. I am powering the ATL with the included adapter and the included gigabit PoE injector. It’s been less than 3 months since I bought it. I will change the injector and the PA.

The idea of filling the memory is kind of possible because I enabled disk logging (10 files, 1000 lines each). The average size of one file like this is 80-90-100 kb. Total is no more than 1 MB.