I've got a question about one of the data points pulled and reported by the WLCCA tool. If this isn't the best place to ask, just point me in the right direction. 
My question is about the Channel Utilization number reported by the APs in the "show run-config" command (and shown in the WLCCA tool under the RF Summary tab). The numbers reported by the APs are routinely higher than the utilization percentages I see when walking the same area using Cisco Spectrum Expert/Cognio. I'd guess they are easily 20% higher than my "eyeball estimate" from CSE, but I've honestly never done a side-by-side comparison.
How is the reported Channel Utilization number derived on the APs? Is it a timed average (such as a 5-second or a 60-second average), or is it a high-level watermark over the last N seconds?
I'm working with a customer where we are relying on these numbers (collected from the WLCCA tool) to determine which changes are having a positive impact -- and by how much. More than 45% of their APs are reporting channel utilization over 50%, and at least 15% of the APs are reporting channel utilization higher than 70%. Compared to other customers I've worked with, those numbers are pretty bad (although they are a distant second to my worst customer, but they are a developer of consumer-based wireless products so that wasn't too much of a surprise with thousands of "rogue APs" being present).
Thanks in advance, as always!
Regards,
Steve
