@C1rm0ska, I have the same situation with the same configuration. The issue started after the last upgrade.

Hi... as I mentioned on my response, It was a cable issue. You can close the ticket. Thanks for the response

Thanks for the reponse. I found the problem. There was an problem with 2 lan cables, they fit perfect with the laptop' and other devices LAN ports, but they don't fit properly with the Decos' LAN...

Thanks for the reply... I reset all the Decos and set the network from scratch. It solved the issue for a couple of days but again I have the same issue. I tested with the following procedure: 1. I...

After the last firmware update, my decos lan ports limited the speee to 100Mbps (M4 has gigabit ports). However my wireless speed is 300Mbps, the same as the provided by my ISP. My network topology...