I have a TP-Link Archer C2600 dual-band router set up in the first floor of my house that provides poor signal strength at the opposite 2nd story corner of my house.
In order to extend my wireless range and also connect upstairs devices in a wired configuration I bought a TP-Link Archer C5 dual-band router and successfully setup a WDS backhaul over the 2.4GHz band as instructed by this TP-Link article. See figure below
What I found interesting is that TP-Link instructs to configure WDS only on the extended/repeater router (C5 in my scenario) and to leave the root router (C2600) as-is. TP-Link calls this Active WDS for the Repeater and Passive WDS for the root router.
However, this article from Netgear requires configuration changes on both the root & repeater router such that both routers know each other's MAC address. Using TP-Link's terminology, this would be dual Active WDS