You might open a TAC case as all scenarios are different, perhaps especially when it comes to RRM.
But as your issue sounds similar to one I had when upgrading my controllers this past October, you might check your DCA sensitivity. The threshold for channel changes was lowered at one point making channel changes significantly more frequent for me. I altered my settings back to 'low' which I had to do on each controller itself - I could not do so through WCS. On the controller: Wireless..802.11<x>...RRM..DCA...'DCA Channel sensitivity' My issues with this problem tend to revolve around a lack of rogue AP enforcement. Knowing about them is one thing - physically locating them can be much harder. You can change to less frequent automatic channel assignments (or manual periodic ones) instead of trying to be a nice neighbor, but it might just shift the problem to the clients where they will suffer and the problem will be less visible. -- > -----Original Message----- > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:wireless-...@listserv.educause.edu] On Behalf Of Timothy Payne > Sent: Monday, January 25, 2010 10:17 AM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: [WIRELESS-LAN] Cisco WCS Issue > > Good morning! > > Last year, we were seeing a lot of APs flopping up and down as they > changed channels or power levels (per the consultant) for no reason. > At that time, we upgraded to 5.2.148.0 and the issues mostly went > away, and the ones that remained we were able to work around and > planned to replace those APs in our next budget cycle. Our consultant > indicated that there are still some issues with this with the new code > and old APs. > > Today, we ran a report of all the 'down/up' events for all the APs and > we had around 350 over the last 12 hours. We have around 200 APs, so > that average seems to be high. That leads to two questions: > > 1) Does anyone know of a way to make the report indicated WHY it went > 'down/up'? > > 2) How many times do you see your APs changing channels? My thought > is that dynamically they should be changing all the time as load and > interference change, but I can't find any documentation to address > that. > > Thanks! > > Tim Payne, CISSP, CISM, CCNA > Network Administrator > Macalester College > > ********** > 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/.
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