wilsodg wrote:
Turning off the 2925 wifi and replacing it with the spare 902 has made a marked improvement (no black hole for the Apple devices). So it seems that when a device on the AP's want to roam, somehow the 2925 is blocking data. I can now wander around the house and the phones change AP almost seamlessly. Moral of saga - Router wifi is fine stand-alone, but if you want to extend it, it's better to go with all external APs and turn router wifi off. Which is counter to the marketing blurb from draytek.

Settings.
Channels selected so no/minimal overlap.

Bandwidth = Auto (seems to select 20).

Under roaming, Strictly Min RSSI is -70db (50%).

Band steering is off. In a home environment, I see no benefit to this

hornbyp wrote:
Let me start by saying, I know very little about Apple products...

My thoughts:-

wilsodg wrote:
Turning off the 2925 wifi and replacing it with the spare 902 has made a marked improvement (no black hole for the Apple devices). So it seems that when a device on the AP's want to roam, somehow the 2925 is blocking data. I can now wander around the house and the phones change AP almost seamlessly. Moral of saga - Router wifi is fine stand-alone, but if you want to extend it, it's better to go with all external APs and turn router wifi off. Which is counter to the marketing blurb from draytek.

You seem to have found an interaction - though I'm not convinced it's quite what you think...

It's always the client, that decides what to connect to. Access Points can 'boot them off' and can stop them connecting - they can't, however, force them to connect, in the first place. This is how the various AP-assisted roaming schemes work: i.e. disconnect the client and then add it to a (timed) block-list.

SYSLOG is the place to look for diagnostics - collecting all the APs via one central Syslog server makes it easier to see the overall interactions.

Settings.
Channels selected so no/minimal overlap.

That's got to be good.

Bandwidth = Auto (seems to select 20).

Wider is better (i.e. faster - but if you're only accessing the Internet, this may not matter). 5GHz is measurably faster than 2.4GHz, if it still gives you the range you require. Again channel width has an effect (watch out for Sky Q boxes using all the available non-DFS channels, by-default!)

Under roaming, Strictly Min RSSI is -70db (50%).

With an all Draytek implementation, the "Minimum RSSI" (the cooperative scheme) ought to work better. Rather than just chopping a client, it only happens if the APs agree it would be beneficial. You could experiment with Transmit Power settings as well, if devices are tending to 'hang on' to the first AP they encounter.

Band steering is off. In a home environment, I see no benefit to this

I agree - and sometimes it fails miserably, bouncing clients to a totally different AP
I went further and separated the 2.4GHz and 5GHz SSIDs (on the basis that they are separate radio systems, with nothing in common!)

tazladd wrote:
What would you suggest for min RSSI then in an home environment?