Ultimately only 25% of sites had clean channel plan in the 2.4G band. 2.4G ACI is primarily driven by APs not on channels 1,6 or 11, with secondary impact from BSSIDs with 40Mhz channel widths.
Surprisingly ACI isn’t much better in the 5G band as 65% of sites still suffer but the primary culprit here is 40Mhz and 80Mhz wide channels with non-overlapping primary channels.
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