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Hi, I am trying to get a new RUT951 (FW version RUT9M_R_00.07.02.3) up on LTE as the only WAN connection, using sim 1.
I get as far as where I can observe that the 4g connection is ok, but the wwan0 network interface is not coming up:

uqmi -d /dev/cdc-wdm0 --get-current-settings
       "pdp-type": "ipv4",
       "ip-family": "ipv4",
       "mtu": 1500,
       "ipv4": {
               "ip": "",
               "dns1": "",
               "dns2": "",
               "gateway": "",
               "subnet": ""
       "ipv6": {

       "domain-names": {


If I now go ahead and configure it manually, it seems to work (for a short while until the autmation takes over and fails again):

ip addr add brd dev wwan0
ip link set wwan0 up
ip route add default dev wwan0 proto static scope link src metric 3


PING ( 56 data bytes
64 bytes from seq=0 ttl=54 time=55.390 ms
64 bytes from seq=1 ttl=54 time=55.038 ms

I see the following from mob1s1a1 in the log:

Starting network mob1s1a1 using APN <my apn>
cid4: 7
uqmi -d "/dev/cdc-wdm0" --timeout 3000 --set-ip-family ipv4 --set-client-id wds,"7"
uqmi -d "/dev/cdc-wdm0" --timeout 3000 --set-client-id wds,"7" --start-network --profile 1
pdh4: "No effect"
Unable to connect IPv4
Releasing client-id 7 on /dev/cdc-wdm0
Failed to create IPV4 connection
Stopping network mob1s1a1
Command failed: Not found
Command failed: Not found
Command failed: Permission denied

so it appears something is going wrong in some script somewhere but I have not been able to figure out where.

I have been able to update a RUT950 from fw version 06.08.5 (which we have a lot of) to the same firmware version and get it online on 4g with similar settings.

Any hints as to what goes wrong appreciated!

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Thank you for contacting us.

I would like you to attach a troubleshoot file to your question. Please, replicate the issue, then access router's WebUI, go to System -> Administration > Troubleshoot section and download troubleshoot file from there.

Best regards,



Working on it - the troubleshooter function by default bundled that router's VPN certificates since I am using the inline OpenVPN config format. Maybe it is better to filter/garble at least the private key section before creating the tarball?

Uploaded troubleshooting now.

This was the result of a clean factory reset from the GUI + a configuration run from our ansible setup, but leaving out the final vpn configuration steps


Make sure you are using a correct APN. You can also try Auto APN option in Network -> Interfaces -> <Your_mobile_interface_settings>.

Check if your provider does not require you to have VoLTE enabled. You can enable it in Network -> Mobile -> General section.

If the above are correct, I would like you to update your device's modem firmware. Before attempting the update, you need to connect your router a different WAN source, either wired or wireless. Below are the the instructions:

  • Access your device via SSH and execute the following commands:
    • opkg update
    • opkg install modem_updater
    • opkg install sshfs
    • modem_updater -g
  • The last command will list available firmware versions. Next modify the following command:
    • modem_updater -i <ID> -v <VERSION>
      • <ID> - should be 1-1, however, in case of an error you should be shown a correct ID.
      • <VERSION> - enter the latest firmware version from the list of the previously executed command, it should be EC25ECGAR06A12.

Best regards,



Thanks for the feedback - unfortunately it does not appear to have solved the problem:

I first tested with volte enabled (no difference)
and then updated the modem firmware according to your instructions. There was a choice between  version

root@nmtest:~# modem_updater -g

Available versions:

I chose the non-beta version.
After the update and reboot, I still see no WAN link coming up automatically, and I am still able to configure it manually and ping out via mobile until automation kicks in again,suggesting to me that there's something with the script logic rather than the mobile interface?

I would like you to generate another troubleshoot file with new modem firmware. I will forward it to the RnD to check.

Best regards,
Seems I had to delete the old file to upload a new - just done that now.
I tried upgrading to RUT9_R_00.07.02.5 today - still no mobile connection - any news on this?