Help required in gathering information regarding EAP protocols.

Hi, Could any body help me to know where can I get a detailed operation info about EAP-TLS, EAP-TTLS:MD5, EAP-TTLS:MSCHAPV2 and EAP-PEAP other than RFCs. Can I get in the internet any sequence flow diagrams with each step explained in detail for all the EAP protocols. It would

Reject packet with zero length

  Hi all,       We are using FreeRADIUS server for one of our requirements and we saw freeradius server sending a reject packet with zero length attributes.     Could anybody of u can help me in understanding in what circumstances FreeRadius server will send a re