Hello,
I would like you to try the following:
Access the router via SSH or CLI (in the WebUI navigate to System -> CLI), use root as user name and router's WebUI password to login.
Next execute the following command:
Check if under config condition section for mob1s1a1 interface you have lines like these:
- option track_ip '1.1.1.1'
- option track_ip '8.8.8.8'
If you find these, you will need to edit the config file by first entering this command:
Then press letter i to start editing and change previously mentioned lines to:
- list track_ip '1.1.1.1'
- list track_ip '8.8.8.8'
Once done, press Esc button, then enter :wq and press Enter.
You can read more about the issue here: https://community.teltonika-networks.com/50556/bug-in-failover-config-handling.
See if that helps.
Best regards,
Žygimantas