dot1x authenication and windows 7

Unanswered Question
May 25th, 2011
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Hi All,

We have recently been upgrading all of our laptops to Windows 7 from Windows XP and since this time the dot1x authentication has stopped working, has any one else had an issue like this. Below is some information that may help.

Switch  WS-C2960-24TT-L
IOS Version 12.2(50)SE5

Switch config

aaa authentication login default local
aaa authentication dot1x default group radius
aaa authorization network default group radius

dot1x system-auth-control

radius-server host auth-port 1812 acct-port 1646 key XXXXXXXXXXXXXXXX

interface FastEthernet0/2
switchport mode access
authentication port-control auto
dot1x pae authenticator
spanning-tree portfast

logging output

*Mar  1 02:59:42.749: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up
*Mar  1 03:01:13.363: %DOT1X-5-FAIL: Authentication failed for client (Unknown MAC) on Interface Fa0/2
*Mar  1 03:01:13.363: %AUTHMGR-7-RESULT: Authentication result 'no-response' from 'dot1x' for client (Unknown MAC) on Interface Fa0/2
*Mar  1 03:01:13.363: %AUTHMGR-7-FAILOVER: Failing over from 'dot1x' for client (Unknown MAC) on Interface Fa0/2
*Mar  1 03:01:13.363: %AUTHMGR-7-NOMOREMETHODS: Exhausted all authentication methods for client (Unknown MAC) on Interface Fa0/2
*Mar  1 03:01:13.363: %AUTHMGR-5-FAIL: Authorization failed for client (Unknown MAC) on Interface Fa0/2

Thanks for any help.


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Antonio Knox Wed, 05/25/2011 - 06:00
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Couple of things,

  • In Services, make sure the  'Wired Autoconfig' service is started.
  • Make sure that you go to the 'Network Adapters' screen, right click the connection and go to 'Properties'.  Click 'Authenticaiton' tab and check the 'Enable IEEE 802.1X authentication' box, then choose an authentication type that matches what you're running.

You should be set after that.

Murray Bown Wed, 05/25/2011 - 06:22
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Hay Antonio,

Thanks for your reply.

I have already made these settings via Group Policies.


Murray Bown Tue, 06/28/2011 - 05:59
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SO for those looking for a resolution to this type of issue I have found a solution, As it happens it was to do with a network security filter installed by our anti-virus software (NORMAN) not Norton. Dissabling this item in the network properties fixed the problem.

Thanks to those that replied.



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