How to set up Tenda Nova mesh for wired backhaul - MW5, MW6, etc.

[pumpkins001]

Great thread here all. I've also been having problems all of a sudden with my MW3 3-node setup that's been running fine for years. Over the last couple of months I've had wifi dropouts, most notably seen on my cell phone / mobile phone as I use wifi on that when at home. My phone drops internet connection but wifi connection is still there - I look at the MW3 node and the green light is flashing. But I can jump onto my PC that's connected to the same switch as the node and the internet is fine - no change. After a minute or two, the led goes back to solid green and the internet comes back on.

Happens across all 3 nodes. All 3 nodes are wired backhaul. Primary node set to bridge mode, and is the only thing between my ISP router and my entire network - ISP router connected to WAN port, LAN then goes to switch that connects to all the other nodes via their LAN port.

I've tried powering all the nodes off and bringing them back online. All firmware is updated. Capacity-orientated mode off, fast roaming on. The events don't affect any of my other wired devices (TVs, 3 x PCs, power logging, hardwired Chromecast etc) that are all connected to the same wired network as all the nodes.

Any thoughts?