I had a quick look at your home link and spotted the instructions to set a DGN2200 as an access point. I have an old HomeHub4 and thought I will have a go. There is no mention of the SSID or password so I imagine you recommend keeping the original. However, I did a bit of a search and found most blogs recommended using the SSID and password from the main router.
It works a treat, BUT, every now and then it freezes. My iPad shows that I have a full signal but it will not connect. Sometimes it will after a minute or so, other times I have to switch off Wi-Fi then re-connect. I suspect that the iPad is switching between routers, even though the main router has a reasonable signal in the room that has the access router. If I set a different SSID to my HomeHub5 I imagine there will be the same sort of problem when I move about the house. 5Ghz is switched off on both routers indecently as it has always been a problem in the past
Your comments would be appreciated.