Ever since I upgraded my RM1PE to firmware version 1.8.0, the device loses network connection roughly every 5 to 8 hours. I have it connected to an H3C 24-port switch, and the RM10 on the same switch works perfectly with no such issues.
I've tried replacing the Ethernet cable and the power adapter (the setup is backed by an online UPS), but none of these troubleshooting steps fixed the problem. When I rolled back the firmware to version 1.7.1 during testing, the device operated stably with zero disconnections.
I later heard that this issue was resolved in firmware version 1.8.2, so I upgraded to that release. Unfortunately, I'm still plagued by the exact same disconnection problem.
Quick update: My switch is an H3C S5130S-28S. I had ACL access restrictions set up on the router before, but they've been completely removed now. Also, the device works perfectly fine with no drops on firmware 1.7.2.
I followed your tutorial to set it up, and the machine has been working fine for 4 days. By the way, I found the same problem on RM1 - 1.8.0 and RM10 - 1.8.2, and the same fix worked for both.