Hello, my X1500 works fine with three nodes and a fibre 300 MB incoming line.  I do have an issue with a 10+ yr old Brother BW-2270 printer, (runs only on 2.4 G band) - whereas I have enabled both bands in the network.  Both bands have same password and network name and I can see the printer connecting to one of the routers.

Now, for some reason unknown to me the printer drops out, this is not a range issue, the router is 8 meters from the printer and signal strong - I suspect it may have something
to do with the old equipment, I have a newer Canon inkjset also running on 2.4 which never drops out. The BW is my reliable workhorse and way beyond end of life/no support available.  But I'd have to replace it, any suggestions are highly appreciated.  I have the latest SW on all nodes.

Best regards