Good Morning Lee, Is AP Failover configured on each of the APs that moved? Is AP Fallback enabled on the production and disabled on the new? Is the 8510 already a member of the mobility group?
If yes to each of these, I would assume that the APs moved for some reason, maybe a small drop in the network. Since they moved and AP fallback was disabled on the new controller they never went back to the primary failover. I hope this helps… From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Lee H Badman Sent: Thursday, February 19, 2015 9:50 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Cisco WLC "AP Fallback" Gone Wonky? Hello from snowy Syracuse. For the Cisco WLANers in the group: Adding a new 8510 HA Pair to an existing large environment. The 8510s are up with management addresses, and AP fallback is disabled. Basically, these are controllers that are being configured as time allows and so need to be on the wire. Typically, disabling AP fallback is all that's needed to keep the APs away while working on a WLC. These 8510s have been sitting there for a week- idle and a work in progress-, and last night out of the blue one of them took on like 150 APs (is licensed for 1000) from a few different controllers in a very random feeling event (no disruption to the controllers that shed APs). Since the APs hit a controller that wasn't properly configured, lots of clients were dead in the water. Did something change in 8.0.100 code or the 8510 that makes "AP fallback disabled" not effective? Is there any more positive way of keeping APs off of a controller that's a work in progress other than ACLs and putting them on different networks, etc? Seems reasonable to be able to just turn off a controller's willingness to take APs... (just copied my inquiry from Cisco forums to this email) Anyone have thoughts? Thanks- Lee Lee H. Badman Network Architect/Wireless TME ITS, Syracuse University 315.443.3003 ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
