After our upgrade from 7.4.100.0 to 7.5.102.0, we've had intermittent issues with clients connecting. We have two SSID's. One is an internal SSID designed for our employees. Our employees connect to this SSID using their AD credentials, via an ACS. The other is an open guest SSID that pipes out to an anchor controller in our DMZ. The DMZ controller is also a DHCP proxy for the guest wireless network. It appears that when a user has an issue, the actual problem is that they are having an issue obtaining an IP address. I would say that it might be an issue with our DMZ controller proxying the DHCP services for our guest wireless network, but our internal users are having the same issue. For internal users, we have helper addresses that point to an InfoBlox DHCP appliance. For our guest traffic, I've made sure that I've enabled the DHCP proxy feature, whereas with the internal users I've turned this feature off. Also, it seems that the problem is less prevalent when disabling the DHCP Req option, in the advanced tab of the WLAN. I've opened up a TAC case, sent files, but have yet to hear anything. Can anyone think of anything else? Thanks!
