It could be all kinds of things. A slow scan for DNS servers, but a really well paced one! But since the clients IPs showing up are scattered across multiple SSIDs and vlans, and no pattern has jumped out at me, I was more interested in trying to figure out what Clarity is really reporting.
Since the report is showing singular time-outs for things that aren't expected to answer, I haven't figured out how to get more info from (Airwave/Clarity) to help me track down the source/cause. It may be that this is not working on my installation (8.2.1.1) but I can't even filter for an IP address or partial, to see if there is a pattern. And the lack of any kind of relationship to a time-stamp means it's "yeah - that happened."
Obviously, if I could filter on my known, wanted servers, and display them all at once - I could see if there was a problem with our wanted DNS service. I'm intrigued by these failures only as a curiosity, but Clarity doesn't give me any info to track it down.
Or does it, and I just haven't been able to figure that out? I haven't found any documentation on it. Any pointers to documentation I've missed?
-j