We had this occur when we upgraded WLC's from one code version to another. It only happened on Foundry PoE switches, and the fix was to upgrade code on the foundry switch, use a PoE injector, and/or in some cases change the AP setting to "Pre-standard 802.3af switches".
It was easier to find which ones were having trouble via the CLI commands: show advanced 802.11b summary show advanced 802.11a summary Good luck. Curtis Larsen University of Utah IT/CIS Sr. Network Engineer ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv [WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] on behalf of Gregg Heimer [ghei...@mc3.edu] Sent: Thursday, September 10, 2015 10:32 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Cisco Wireless AP's Radio Down Anyone with Cisco APs and Cisco Prime get these odd alerts from PI that state the radio is administratively up but operationally down with a reason of unknown? I have been getting a slew of these lately. We have introduced quite a few 1702’s into our environment and I am wondering if there is some issue with recalculation, or something that triggers a radio reset to resolve a different issue? Below is the alert notification. Cisco forums haven’t been much help, so I figured I’d take a shot at the group. Thanks! Virtual Domain: ROOT-DOMAIN PI has detected a change in one or more alarms of category AP and severity Critical in Virtual Domain ROOT-DOMAIN. The new severity of the following items is Clear: 1. Alarm Condition:Radio administratively up and operationally down Message: '802.11a/n/ac' interface of AP 'AP01-XXXX' associated to controller ‘XXXXXX (172.X.X.X)' is down. Reason: Unknown - Device Name: ‘XXXXXXXXX Failure Source: AP AP01-XXXX, Interface 802.11a/n/ac ___________________________________ Gregg Heimer Sr. Network Engineer Montgomery County Community College 340 Dekalb Pike Blue Bell, PA 19422 ghei...@mc3.edu<mailto:jsta...@mc3.edu> 215.641.6442 ________________________________ Montgomery County Community College is proud to be designated as an Achieving the Dream Leader College for its commitment to student access and success. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
