Hi all,
I've been struggling with a problem trying to implement NAC/802.1x with Dell Optiplex 990s running 82579LM NICs with the latest drivers (and drivers from 2010 also did not work).
Basically what we're seeing is, intermittently when a machine boots up from being completely shut down, EAP information is not exchanged (never sent from the client to the switch) and it just hangs. We've had this problem using a Windows 7 native supplicant, as well as the Cisco AnyConnect supplicant. Upon debugging, Cisco's determination was that they were not seeing a "link up" event from the driver in the incidents where a failure occurred. We can get the machine to authenticate by either restarting the Wired Autoconfig service (Windows 7) or bouncing the port (Cisco supplicant).
Has anyone run into similar?
FYI - Our switches are Catalyst 2960s running 15.0(2)SE code, but we also had this issue in a 12.2 train we ran.