I yesterday tried the last trick: Setting the laptop to the same IP address as the relay unit and connecting it to the router. As expected, the router did not restart, and I had normal connectivity...

Today I tried a few new tricks: Plugged the cable that comes from the relay unit into the laptop, to see if the laptop will get an IP address. It did not, so there's not a DHCP server running on the...

@Sunshine Thanx for the reply, good to see there's some support on my issue. Regarding your requests, here's the version information from the bottom of the MR6400's web interface, please let me know...

I did some extra testing, adding an ethernet switch between the relay unit and the router. Same thing. So, I guess it is a software issue. The relay unit only supports static IP. I have set it to...

Hello. I manage three (so far) solar parks of decent (1GWp each) size. I am using a TL-MR6400 4G router for connectivity on each one of them. Had no problems until today, that is until I tried to...

@TP-Link thank you for the reply, I really appreciate it. I was expecting that. Good thing it does work as an access point when connected through Ethernet, not being part of a powerline network.