3 ms·
The problem with 5GHz is that some 60% of the spectrum is locked behind 1/10 min DFS for ill-conceived radar coexistence, so all the APs usually bunch in the fe
by stefan_ 6y ago
The problem with 5GHz is that some 60% of the spectrum is locked behind 1/10 min DFS for ill-conceived radar coexistence, so all the APs usually bunch in the few channels that don't require that.
- dboreham 6y agoIf the AP supports DFS channels at all.
- stefan_ 6y agoIt cuts both ways - when 5GHz was new, there were lots of client devices that didn't support the DFS channels at all (even if as stations they don't need to do DFS). So still today AP vendors are cautious to use them because of the potential for support calls from people with older mobile devices that "don't show the AP at all".
- dboreham 6y agoThis can even happen on 2.4GHz with the extra channel allowed in Japan. Stations and AP can disagree about whether they're in Japan.
- stefan_ 6y ago2.4GHz channels are another of the many many regrettable paper cut things with WiFi. I have a 2.4 only gadget that the manufacturer ships with the narrowest regulatory settings so they can sell one SKU and it can't use channel 12 that is available almost everywhere but the US.
- Reason077 6y agoI just suck it up and take the DFS hit, which seems to be about +30 seconds of additional router reboot time. The interference-free 80 Mhz channels are absolutely worth it! If my router could remember the DFS state between reboots it would be even better, though.
- drewg123 6y agoThis is actually super helpful. Next time I'm there, I'll see if her router supports DFS!