I was advised to ask this here (also asked on dslreports). I see my issue is not exclusive. I have had a G1100 router and wcb6200q wi-fi extender for awhile now. Not really many issues, although I've found that streaming through the extender is sometimes hit or miss. Anyway, all of a sudden over the last few days, I have all kinds of issues with 5Ghz via the extender. Devices are connected, but no internet traffic, can't even ping the router! 2.4Ghz is working fine.
User on DSLR suggested I turn SON on (had been off). Another suggested I "disable DFS on the 5g radio."
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As far as I see it, SON is an idiosyncratic way of negotiating wireless protocols with devices and between access points.
Some devices have problems joining a SON-enabled WLAN. It is the best to do the configuration manually. I don't want the devices to be too "smart."
It’s really not necessary. My netgear routers do the same thing only called something different. I simply turned it off. I believe it is called steering on my router.
totally unnecessary to have it assign WiFi as it feels it should be.