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802.1x random authentication failure for pc behind cisco ip phone RRS feed

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    Hi Guys,

    i have a setup with a pc cascading from an cisco ip phone connecting to a Alcatel switch. Users a meant to perform a 802.1x authentication when plugged into the network. However for whatever reason, the pc did not complete an eap transaction thus it performed an mac authentication with my radius server. 

    May i know if there is any know issue or reason why my pc did not respond to the eap request ? The pc model used in my enterprise is as follow. 

    Lenovo

                    X201      3-4 years

                    X220      2-3 years

                    X230      2-3 years

                    T410       3-4 years

                    T420       2-3 years

                    T430       2-3 years

                    T400       4-5 years

                    W520     2-3 years

     

    Dell

                    E4200    4-5 years

                    E4300    4-5 years

                    E6230    2-3 years

                    E7440    1-2 years

                    E7450    1 years

                    E7250    1 years

    Friday, January 8, 2016 2:32 AM

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    Hi,

    Could you please describe more detailed about "cascading"? Do you mean the PC connect the network via the IP phone?

    We would like to suggest you connect the machine to the switch directly to test the issue. Also, please check the 802.1X authentication settings by referring the link below.

    http://windows.microsoft.com/en-us/windows/enable-802-1x-authentication#1TC=windows-7

    Hope it will be helpful to you.

    Best Regards,

    Simon

    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Monday, January 11, 2016 2:18 AM

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    Hi,

    Could you please describe more detailed about "cascading"? Do you mean the PC connect the network via the IP phone?

    We would like to suggest you connect the machine to the switch directly to test the issue. Also, please check the 802.1X authentication settings by referring the link below.

    http://windows.microsoft.com/en-us/windows/enable-802-1x-authentication#1TC=windows-7

    Hope it will be helpful to you.

    Best Regards,

    Simon

    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Monday, January 11, 2016 2:18 AM
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    Hi,

    We wonder if there is any luck your issue has been resolved, if you've found solution by yourself. We would appreciate it if you could share with us and we will mark it as answer.

    Wish you have a nice day.

    Best Regards,

    Simon

    Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact tnmff@microsoft.com.

    Wednesday, January 13, 2016 7:39 AM