Did you go back and correlate the event? For example, SSH into a few of the WAP’s and look at their logs to see what they thought happened. Did the CAPWAP uptime actually change on their WAPs qne/or the hours they report being connected. The WAP logs tend to be very informative.
If you use DHCP to hand out IPs for the WAPs, did you have a look at your DHCP logs? Many years ago, I saw something similar and it turned out to be the DHCP server – a mass of WAPs went to renew at the same time, DHCP server couldn’t take the load, and failing the renewal, a mass of WAPs disassociated/associated. Jeff From: "[email protected]" <[email protected]> on behalf of "[email protected]" <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Monday, September 11, 2017 at 11:48 AM To: "[email protected]" <[email protected]> Subject: [WIRELESS-LAN] spurious cpi report of mass AP disassociation We're using Cisco 8540 on code 8.2.151.0. Last week CPI reported a great number of simultaneous AP disassociations and then reassociation. CPI shows all the events had the exact same timestamp right down to the hundredth second. It was just a single event. But I can find no event preceding it that would cause such a thing. No preceding controller errors that I can see. At least a hundred APs were on the list. The APs weren't the same type or in the same buildings. I can find no common thing at all about it. No one called in to report any issues. I would think if they really did drop those on an affected AP would have noticed. Only one AP in the building housing IT was on the report, so perhaps not surprising that none of us noticed anything. Has anyone out there seen anything like this? Aside from the unknown cause, is it possible for disassocation and reassociation happened fast enough that users wouldn't see any serious disruption if only doing stateless stuff? I'd have trouble believing the controller would report AP drops that didn't happen. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
