Have a very strange issue.
I have a number of clients that are having a problem staying connected to the network while on the wireless.
I have a 5508 Controller running 126.96.36.199. APs are 3502i APs.
The clients can be connected to the controller, they have what appears to be full signal, but they lose all connectivity to the network. I check my switches, and their ARP resolution even disappears.
I've run debugs on the WLC on a particular client, and it shows the client associating to the controller and never shows it disassociate, but, after a while, they just lose connectivity to the LAN. Typically they have to disassociate from the WLAN and reconnect.
One thing i've noticed is that this is not occuring on my Guest WLAN, which uses a different authentication mechanism.
Guest WLAN authentication is WPA2 PSK. Internal Wifi is 802.1x, talking to ACS5.2. ACS doesn't show any deauths or failed logins.
What's more strange is that it's only some clients. I personally use wifi exclusively, i haven't wired in in months and I don thave this problem, but I have 4 other people in my department that the problem.
They have Dell laptops with intel wifi adapters, drivers are updated to latest versions. I also have a Dell laptop, but mine has a Dell wlan card, not Intel.
WLC has LAG enabled and connects to my Nexus backbone. One connection to each Nexus in VPC configuration.
Could the LAG setup be causing this strange behavior? Anyone have any pointers where to even look for this issue?