Hi I saw such events when we faced bug CSCva66176<https://bst.cloudapps.cisco.com/bugsearch/bug/CSCva66176> but it was massive and recurrent. When we moved from WISM2 to 8540s last May, thinking I should be careful I kept my old controllers (that were turned off) in the list of devices in the mobility group so that we’d have a quick rollback. According to the initial description of the bug we were not at risk but when the student (and yours truly) came back last week, surprise!
Resolution was to delete the old controllers and the rest is history. Might not be exactly what you are experiencing though... Manon Lessard Technicienne en développement de systèmes CCNP, CWNA, CWDP Direction des technologies de l'information Pavillon Louis-Jacques-Casault 1055, avenue du Séminaire Bureau 0403 Université Laval, Québec (Québec) G1V 0A6, Canada 418 656-2131, poste 12853 Télécopieur : 418 656-7305 manon.less...@dti.ulaval.ca<mailto:manon.less...@dti.ulaval.ca> www.dti.ulaval.ca<http://www.dti.ulaval.ca/> Avis relatif à la confidentialité | Notice of Confidentiality<http://www.rec.ulaval.ca/lce/securite/confidentialite.htm> [Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Description : Logo de l'Université Laval] From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: 11 septembre 2017 15:04 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] spurious cpi report of mass AP disassociation Out of curiosity- how many APs, clients (in general) and are you doing 802.1X? Lee Badman | Network Architect Certified Wireless Network Expert (#200) Information Technology Services 206 Machinery Hall 120 Smith Drive Syracuse, New York 13244 t 315.443.3003 f 315.443.4325 e lhbad...@syr.edu<mailto:lhbad...@syr.edu> w its.syr.edu SYRACUSE UNIVERSITY syr.edu From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mark Duling Sent: Monday, September 11, 2017 2:48 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> 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. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
