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in cisco AP 350 when i try to activate EAP in : AP Radio Data Encryption
then the client can no longuer communicate with the AP.
note: in Aironet Client Utility (ACU) the option of EAP is inactivated (i can not choose it)
in the help i found: If your operating system does not have built-in EAP support, this option is not available.
my OS is WINNT4 WS. what should i add to it to handle this feature.
You mean to say you can't select LEAP in ACU under Profile and Network Security section..??
Here is the link which documents cisco's EAP-LEAP config step by step under ACU and ACS..
so if i undestood well, i must have a ACS . otherways it's impossible to use EAP or LEAP