i’m recently doing tests with a RUTX50 in our 5G SA campus network and came across a problem that I can’t quite explain. When the Modem is connected to the 5G network and i restart the mobile connection either via the GUI (Status->Network->Mobile->“Restart Connection”) or the API, the normal behavior is that the Modem sends a resource release request to the Core and the PDU-Session is released. After that the Modem sends a Initial UE message to the Core and the connection is re-established. This procedure takes some seconds for the modem to re-attach to the Network .
This works some time after a reboot but then the behavior changes. Basically it does nothing and ignores the restart command. Instead of sending a release request i get nothing on the Core or gNB (no messages at all from the UE/Modem) and this procedure takes only around 100 ms. This behavoir appears sometimes after one or two re-attaches, sometimes after some minutes or hours of constant re-attach cycles and doesn’t appear right to me. Has anyone an idea why this ocures or why the mechanism changes?
The Modem is running on:
Firmware version: 07.08.2
Kernel version: 5.10.217
PS: A lot of changes/fixes lately on the Firmware and on the RUTX_R_00.07.08.1 update this fix was listed → Mobile: fixed an issue where in some cases mobile network interfaces would not be brought down properly.
Is this problem related and still active?
Could you clarify if after pressing button any error appears in the WebUI?
It’s possible that the modem is busy performing some other operation, thus the command is simply ignored.
The best way to track what is actually going on is to log into the device via SSH/CLI and run the command logread -f. This command will print the logs live.
After pressing a reconnection sequence should be initiated.
I looked at the log files and can confirm that the modem both times initiates a config reload. The major difference is that on the quick reconnection where nothing is sent to the 5GC the IP address is regained from the PDP context
→ IP address on PDP context “1”: “10.10.0.82”,
while on the longer restart cycle with pdu session release/Establishment the logs show an Error message
Since logs would be useful here for further troubleshooting, I have sent you a form to fill out and get in touch with us privately. Please specify the ticket ID as 7387.
Thank you!
button any error appears in the WebUI?