WDS feature simply does not work
I have this TD-W8961N 300Mbps Wireless N ADSL2+ Modem Router, which according to the official guide, can be setup to work as a wireless bridge / WiFi repeater device. The guide configures 2 identical TD-W8961N to act as primary and extended router, and (supposedly) everything works.
Essentially, the user must enable WDS and input the source WLAN pre-shared key and its MAC address, and set the WLAN channel to the same one as the source device. The guide also disables DHCP, but I assume it's not mandatory if I setup DHCP to start from the 192.168.0.100 range to avoid IP conflicts. Also, the router is set as Bridge Mode in the Interface Setup > Internet > Encapsulation page.
I've tried to configure it with the MAC address of my ISP's Cisco Router DPC3848VE, and also this TP-Link repeater to no avail, the router's WLAN is never connected to the other device, no matter how many times I reboot, reconnect or reset and reconfigure the ADSL modem router.
Firmware was already updated to latest version. Any ideas and suggestions will be greatly appreciated.