Some questions about 5GHz WiFi Channels and Channel Width

[Winudertas]

Hi everyone. I’m learning about 5GHz WiFi Channels and Channel Width and I have some specific questions. If someone have some knowledge to answer, that would be very helpful.

1. For example, say I have three routers. We’re talking about Non-DFS channels, so that would be 36-48. All routers are on 80MHz width, but with different selected channels, so Router 1 is 36(42), Router is 44(42) and Router 3 is 48(42). Will I have CCI (Channel Co-Interference), because in this range there is only one not-overlapping 80MHz channel?
2. Router uses Auto channel width and it’s, according Wi-Fi analyzers, 80MHz. Does it affect clients without 80MHz support, because either 40MHz or 60MHz is wasted?
3. Router 1 is using 80MHz width, so example 48(42). Router 2 is on 40MHz width, so example 36(38). Will Router 1 suffers from co-interference, because he is using all 5170-5250MHz range and Router 2 is on the same range? Will Router 1 have any impact on Router 2?

Thank you for answers.

 

[remixedcat]

1900 sq ft house mixed construction, mixed era. typical 1910 layout. Lots of plaster and dropped celings.

The following channel config:
AC-LITE DOWNSTAIRS (MEDIA ROOM): CH 1 FOR 2.4 AND CH 155 FOR 5
AC-LITE DOWNSTAIRS-NX (DINING/FAMILY ROOM): CH 6 FOR 2.4 AND CH 38 FOR 5
AC-LR UPSTAIRS (OFFICE): CH 6 FOR 2.4 AND CH 42 FOR 5
CISCO MERAKI MR32 (BEDROOM):CH 11 FOR 2.4 AND CH 161 FOR 5

All status on ubiquiti controll are "good" for 5 and 2.4 is "acceptable"
Wifi experience is all in the upper 80s lower 90s.

Got tons of neighboring wifi APs. Dense single family homes closer than 30ft


You may want to use those upper channels. Not many do... Most auto configured channels don't use those. I've had way better results on those.