LAN Router issues
 

For months I had an ISP supplied wifi router in the loft, where the phone cable comes into the house #1. When we changed ISP's to Plusnet, I just changed the login details and away it went. Its predecessor had always been fine there until the sheer number of local wifi AP's increased and my ground floor coverage became a bit patchy. So I added a second wifi router #2 on the ground floor via an already existing wired LAN cable. It seemed to mostly work, except sometimes things on the ground floor would sometimes struggle on first trying to connect, or if I swapped from connect to #2 to #1, then back again.

The addition of a Firestick at Christmas, connecting to #2 showed how troublesome it actually was. I swapped #2 for several different routers, some quite ancient, tried lots of settings and nothing I did helped. Connect to #1 and it would connect near instantly, swap back to #2 and it could take an hour before I had a full connection with the WAN/internet available via #2. No apparent issue with any connection to #1 at all. No issues changing the settings at all on #1 router either

It went on for months of trying different things. Yesterday I decided to swap the location of #1 with that of #2, to see if that made a difference and bingo.....

Despite using a wired connection to #1, I struggled to configure it. It would refuse to change its password, its IP, I kept loosing access to it, constantly having to press its reset button to regain access. So I tried another router, as a ground floor access point and all was worked absolutely fine at last. I can swap in a fraction of a second between the two access points.

The problematical original #1 was a D-link DSL 3780, as supplied by Talktalk, not many months ago.