10-09-2019, 02:26 PM
Yes, I'd guess that the TG-789 and the Deco are both running in Router mode which means they will both be handing out DHCP addresses to clients. The TG-789 looks like its using 10. address space while the Deco is using 192. address space. This makes for a bad network configuration
Since the TG-789 is also functioning as your broadband modem I think you have a couple of configuration choices.
1.) Buy a dedicated broadband modem (no Router functionality) and plug the Deco into its LAN port. Your ISP should support a self-purchased modem and they should be pretty inexpensive. I use an ARRIS SURFboard DOCSIS 3.0 Cable Modem and it was about $70 at Amazon.
2) Turn off the Router functionality on the Deco. Its a setting in the Operating Mode screen.
https://static.tp-link.com/2019/201909/2...0M5_UG.pdf
If you do #2 then all your clients should get IP addresses from the TG-789.
-Tim
Since the TG-789 is also functioning as your broadband modem I think you have a couple of configuration choices.
1.) Buy a dedicated broadband modem (no Router functionality) and plug the Deco into its LAN port. Your ISP should support a self-purchased modem and they should be pretty inexpensive. I use an ARRIS SURFboard DOCSIS 3.0 Cable Modem and it was about $70 at Amazon.
2) Turn off the Router functionality on the Deco. Its a setting in the Operating Mode screen.
https://static.tp-link.com/2019/201909/2...0M5_UG.pdf
If you do #2 then all your clients should get IP addresses from the TG-789.
-Tim