Hi,
What Aironet model & IOS version you use? Use the following guide if your AP runs on IOS.
When you used MAC authentication, you have to enable Open Authentication with EAP, but it comes with additional configuration too.
Anyway, since youre looking at dynamic encryption, I believed the solution more or less is stated in the following url:
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_configuration_example09186a00801bd035.shtml
For dynamic encryption, in the document, look under Define Client Authentication. Youre required to set encryption as mandatory (check the snapshot of AP). This means it will dynamically encrypt the data transmitted between client and AP.
Since youre already using MAC Address authentication, you can combined the EAP with MAC Authentication (refer to snapshot of AP config under Step 2).
Before that, you need to generate certificate in ACS. Install this cert in your client pc (right-click, choose install certificate). Let me know of you need info on how to generate self cert in ACS.
For client configuration, under properties Wireless Networks create/edit your ssid setting. Under Association, make sure to enable Data encryption and The key is provided to me automatically. Under Authentication tab, choose Enable IEEE802.1x
. Under EAP type, choose Protected EAP, then click Properties button. Under Trusted Root Certification Authorities, look (scroll down) and select the cert youve just installed. Dont forget to choose Enable Fast Reconnect.
*put all this setup under your existing SSID
Hope this helps you with your WLAN implementation.
Rgds,
AK