mwan3 default config is not proper
Example
- install LTE extension in reForis
- set it up
mwan on
- plug in WAN
- ping a web
- unplug WAN
- ping a web
mwan off
/etc/init.d/mwan3 stop
- plug in WAN
- ping a web
- unplug WAN
- ping a web
LTE works
Solution
Modify mwan3
configuration so it works.