Mike, and Lee- are you guys running DHCP proxy on your controllers? -Lee
Lee H. Badman Wireless/Network Engineer Information Technology and Services Adjunct Instructor, iSchool Syracuse University 315 443-3003 ________________________________ From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:wireless-...@listserv.educause.edu] On Behalf Of Schomer, Michael J. Sent: Thursday, March 18, 2010 11:40 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Client DHCP issues after WLC upgrade Hello, We are noticing a problem on our WPA/802.1x SSID with some of our clients after a recent Cisco WLC upgrade from 5.2.178 to 6.0.188. The clients are able to connect and authenticate to the SSID; however, they aren't receiving an IP address. We have ruled out the DHCP server as the problem. This doesn't affect all clients, and the problem seems to come and go. We haven't seen a common OS or chipset among the clients that are having problems. We currently are running four WLCs in production, and all of them received the upgrade at the same time. The only thing that most of these clients have in common is that they are associated to APs on two particular controllers. The only thing unique about those two controllers is that they have mostly 1131 APs. When the clients roam to a different WLC, they can usually connect just fine. I'm at a loss right now. We did test the 6.0.188 code in one building (with 1250 APs) for several months before deploying it, without any notable issues. We are now potentially looking at downgrading back to 5.2 code, but aren't thrilled about it. Another option would be to upgrade to 6.0.196, but we haven't done any testing of that code revision. Has anyone seen a similar issue? Does anyone know of any issues with 6.0.188 code and 1131 APs? Any thoughts or advice would be appreciated. Thanks for your help. -Mike Schomer -St. Cloud State University ********** 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/.
