We have a ISP that provides access using DHCP, so we have to set up WAN DHCP client.
Unfortunately the Teltonika routers are not able to resolve an adress. Testing with other routers or even only with a PC we get an IP and connection without problems.
I tried a RUTX08 and a RUTX10. Even with different firmware versions (newest and also older one). Of course we tried the factory reset but everything without success.
It brings up the link on the WAN, but then we get udhcpc: sending discover and then ubi0 error: ubi_open_volume.part.0: cannot open device 0, volume 2, error -16
Attached the troubleshoot from the RUTX08 and RUTX10 and a picture of the system log.