Client connections do not authenticate successfully with a Cisco switch when it takes more than five seconds to generate an NAP SoH message on a Windows Vista-based computer or on a Windows XP Service Pack 3-based computer

When it takes more than five seconds to generate a Network Access Protection (NAP) statement of health (SoH) message on a Windows Vista-based computer or on a Windows XP Service Pack 3-based computer, client connections do not authenticate successfully with a Cisco switch.


CAUSE

This problem occurs if the supplicant time-out value for the Cisco switch is lower than the number of seconds that it takes the client to generate the NAP SoH message.


RESOLUTION

To resolve this problem, change the supplicant time-out value for the Cisco switch to 15 seconds or longer. By default, the supplicant time-out value on Cisco 802.1X devices is five seconds.

For more information about how to change the supplicant time-out value, contact Cisco.


STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the “Applies to” section.


MORE INFORMATION

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.



APPLIES TO
Windows Vista Enterprise 64-bit Edition
Windows Vista Home Basic 64-bit Edition
Windows Vista Home Premium 64-bit Edition
Windows Vista Ultimate 64-bit Edition
Windows Vista Business
Windows Vista Business 64-bit Edition
Windows Vista Enterprise
Windows Vista Home Basic
Windows Vista Home Premium
Windows Vista Starter
Windows Vista Ultimate
Microsoft Windows XP Service Pack 3

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Microsoft Knowledge Base Article

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