I use a RUTX09 router with now, firmware “RUTX_R_00.07.16.1” (today updated from an old version 2024). I also updated the modem firmware to “EG06ELAR04A25M4G”.
With this maintenance I also checked the “Event Log”. There I found that since beginning of this month (July) nearly every 10-20 minutes the “IPv4 connectivity started to fail” and is restored afterwards (like in the snippet below).
|4831|2025-07-22 08:23:44|Health checker|Network|Notice|IPv4 connectivity restored|
|4830|2025-07-22 08:22:41|Health checker|Network|Notice|IPv4 connectivity started to fail|
Well, this already started before the firmware update today, but it still happens every 10-20 minutes. In this forum, I only found a similar request related to DNS. But it seems to be related to IP4 in special.
The router is inside a fully waterproof LTE-antenna below the roof. AFAIK, nothing happens to the cable or hardware in any way. Up to now, there were 2 modem firmware updates today.
Due to the “normal operation” at the endpoints, I don’t realize the failures in daily work. But the failures spam the event logs. In my opinion some maintenance must be done. But which? And, of course, the router is rebooted every day - and after the firmware update, today.
First, to understand and analyze the issue further, please confirm the following checks and tests:
Please check and confirm the following general connection points:
Mobile antennas are firmly attached and properly tightened. Loose or partially connected antennas can cause signal instability.
The APN is set correctly. If using an auto APN, try setting it manually and ensuring it matches your mobile operator’s settings (authentication type, credentials, etc.)
Please provide a screenshot of the Status → Network → Mobile page, ensuring any sensitive information (public IP addresses, ICCID, IMEI, etc.) is hidden or blurred.
For testing purposes, try the following:
Navigate to Network → WAN → mob1s1a1 settings, and under PDP Type, set it to IPv4 only (instead of IPv4/IPv6 or IPv6).
Try locking the modem to specific LTE bands known to provide the most stable reception in your area. Band locking can significantly improve stability if certain bands are congested or unstable. Instructions for band locking can be found here.
Log in to the router via CLI (SSH or WebUI) as root and run the following commands:
uci set network.mob1s1a1.dhcp='0'
uci commit network
/etc/init.d/network restart
(You may also reboot the device after applying these changes for consistency.)
If none of these steps improve the situation, further investigation will be required. In that case, we kindly ask you to reach out through our internal support platform, where we can review more detailed troubleshooting information that cannot be shared publicly.
Let me know how it goes and if the issue persists after these checks.
Hello Martynas,
thanks very much for your fast reply. Here a first quick answer to the general points:
The antenna (incl. RUTX09) was installed 2 years ago by myself as “professional” as possible (all screws tighten safely, cable tension released and so on). Since then no one touches the antenna (QuMax XR All-In).
After some toubles at the beginning (APN: internet.eplus.de, MTU had to be reduced to 1420 manually) it worked fine.
Attached I put 2 screenshots of the “Status → Network → Mobile page” showing the “instable behavior”.
Thank you for the update. In this case, to assist you effectively, we’ll need to continue this process privately, because sensitive/publicly unshareable information needs to be gathered. You should find a support request form in the inbox of the email address you used for your forum registration. Kindly fill out the form, and please reference Ticket ID: 14762 when submitting it. Once the form is completed, we’ll contact you directly via email to investigate the issue in detail and help work towards a solution.
