Perhaps I'm using the wrong terminology, if so apologies. I want to extend my main/root router from upstaris to devices that are located downstairs. The devices downstairs are wired and wireless. I'd previously done this using HomePlugs with one of them offering wired and wireless connections but I was having issues.
I understood that I needed to put the VR600 (downstairs) into bridge mode because it wan't connecting to the internet directly (but through the 8800 upstairs). I did this by resetting the VR600, and then on the Quick Set-up select "Other" from the ISP list, and then selecting "Bridge" on the connection Type dropdown. I disabled DHCP and changed the VR600 IP address to 192.168.1.2 to avoid the 8800 DHCP range/IP address. I connected a port on the 8800 (root router) to LAN4/WAN on the VR600. Wired devices connected to the VR600 work OK, and so do wireless devices now - but there was an initial hiccup where the 8800 was seeing the Iphone connected through SSID2 (VR600) to the 8800 and was congused because it had seen it on the 8800 via SSID1.I have found this page https://www.tp-link.com/us/faq-1199.html
which summarises what I've done apart from the "bridge" part.
The above relies on an ethernet cable to connect upstairs to downstairs. I think I'll have trouble hiding the cable (currently runs down the side of the stairs - but only a temporarary/test scenario). Is it possible to connect 8800 to VR600 via wireless signal but still have the VR600 use the LAN ports for my Freeview recorder?