Setting 802.1X With Window 2008

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My company intend implement a system with follow diagram:

 

Client --- Cisco catalyst Switch 2950 (support 802.1x)--- window server 2008 (RADIUS server)

 

or

 

Client ---- Access Point (support 802.1x) --- window server 2008 (RADIUS server)

 

And i not have any document to Reference and implement it...

 

Do you have a document about my problem above. Please share with me...

 

Thanks All ...