Dear All, I am trying to setup EAP-TLS authentication mechanism for my WiMAX testing and following are the details. 1. TATA ELXSI - WIMAX MS 2. TATA ELXSI - WIMAX BS 3. ARICENT ASN-GW version 4.2 4. Free Radius AAA server version 2.1.3 Certificates exchange is through. When AAA server responds with Access-Accept, ASN-GW throws error saying "Validation of the Attributes in the Received packet failed" Wireshark logs @ ASN-GW I could not attach wireshark pcap logs due to size constraint. I have took print screen of only ACCESS-ACCEPT message copied to MS word. What are the mandatory fields in Access-Accept and their valid values? Service-Type attribute value is 2. ASN-GW is adding this attribute. Is this valid for EAP-TLS? I am guessing this should be 8. I don't have control over ASN-GW parameters modification. Please let me know what fields are invalid in above ACCESS-ACCEPT. Thanks ! Rathod.