How about if you connect your PC to your modem directly? You also need to check the negotiation speed of your computer.

CaptainRon19 wrote I'm having the same exact issue as you. I've tried everything I can think of but still no success and the 5ghz Band 1 is consistently disabled.I tried the latest firmware upgrade,...

Generally speaking, TL-SG1016 has no DHCP function and the devices which are connecting to it will obtain IP address from previous router. How you connect all those network devices? In your case,...

Do you mean after you update the latest FW and this issue starts to occur?Have you tried resetting them? you may try that.If the issue still exists after resetting, it's better to send email at...

Connect PC to Deco and connect PC to your main router with ethernet cable to test the speed. If the speed is still low when it connects to Deco, check whether there is other clients connected or...

Try to exchange the place of the RE units to see whether it will be better.