NAC (802.1x & ACS) at Windows Logon

Unanswered Question
Jun 9th, 2008

I have a question about NAC & Windows Logon. I currently have a Cisco 3560 as the Network Access Device. Cisco ACS Solution Engine is running for my ACS Server. I'm doing internal posture for Active Directory Auth, and External Posture for Trend Micro AV. Clients have the CTA + Supplicant installed.

When I logon to Windows upon booting up I'm placed into the quarantine vlan and on the NAD (3560) the log shows CiscoTrustAgent Not Detected. If I disconnect cable and plug back in, everything works posture comes back healthy, I'm authenticated, and placed into the correct VLAN.

Any idea why it is different first logging into windows versus plugging in after logging in?

Thank You,


I have this problem too.
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owillins Fri, 06/13/2008 - 05:57

This looks like a misconfig. Better enable the logging function in CTA run the command “ctalogd enable” from the command


kevin.corace Fri, 06/13/2008 - 06:02

I was able to fix the logon to windows issue by changed the timers on the switch for the 802.1x authentications, quit timer, and tx timer. Does this normally need changed from default?



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