how to figure out which channel isn't interference with the other ap.

[zlinuxboy]

I deploy an aerohive ap on a public space, and choose 36 channel(width 80Mhz). If the other guy deploy anohter ap(802.11 ac2 ) neaby and choose 44 channle(width 160Mhz), does this two channel interference with each other?

[zlinuxboy]

base on the image you posted, If choose 40Mhz channel width, then the center point of channel should be 38, 46… 151, 159 etc, but here is the result of `show acsp`

Interface Channel select state  Primary channel  Channel width Power ctrl state      Tx power(dbm) Use Last Selection
--------- --------------------- ---------------- ------------- --------------------- ------------- ---------------------
Wifi0     Disable(Link down)    Down             20            Disable(Link down)    Down          Channel:No  Power:No
Wifi1     Enable                157              40            Enable                14            Channel:No  Power:No

the channel is 157, how to determine if 157 is bonding with 161 or 153?

[Tomasz]

P.S. According to your question in the topic, please try to avoid reusing same 20 MHz channel or overlapping bonded channels as long as it is possible:

Grabbed the above image from the interwebz.

Cheers,

Tomasz

[Tomasz · Accepted solution]

Hi,

Yes, they will. The sort of issue you may experience is overlapping BSS, where primary channels are more strict about clear channel assessment than secondary channels from what I remember. That means, you may end up with lots of traffic on wide channel secondary part bursting lot of MCS data not caring much about what’s going on this channel as another AP’s primary. It would be better to keep them off on the spectrum or - if they need to overlap - keep their primary channels the same. You will split your channel capacity in half but it’s better. Is that wide channel really needed? In enterprise I’d aim to remain 20 MHz or go into 40 MHz depending on the radio environment size and density.

More:

https://www.mikealbano.com/2015/10/channelization-obss-impact.html

https://divdyn.com/wi-fi-throughput/

Hope that helps,

Tomasz