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Cisco Aironet 802.11a/b/g Wireless LAN Client Adapters (CB21AG and PI21AG) Installation and Configuration Guide
OL-4211-03
Chapter 10 Troubleshooting
Error Messages
Error Message Authentication failed due to invalid client attributes (e.g., Login
Name).
Explanation
The domain logon failed because of an invalid client configuration setting, such as a
mistyped login name.
Recommended Action Return to the PEAP configuration windows, verify your settings, and make any
necessary modifications.
Error Message Authentication failed due to invalid client certificate.
Explanation
The domain logon failed because of an invalid client certificate.
Recommended Action Contact your system administrator to obtain a valid certificate.
Error Message Authentication failed due to invalid server certificate.
Explanation
The domain logon failed because of an invalid server certificate.
Recommended Action Contact your system administrator.
Error Message Authentication failed due to invalid server/domain name.
Explanation The domain logon failed because of an invalid server/domain name.
Recommended Action Make sure the Specific Server or Domain field is blank on the Advanced
Configuration window for PEAP (EAP-GTC) or PEAP (EAP-MSCHAP V2). Then follow the
instructions in the “Enabling PEAP (EAP-GTC)” section on page 5-42 or the “Enabling PEAP
(EAP-MSCHAP V2) Machine Authentication with Machine Credentials” section on page 5-49 to
correctly enter your username in the Login Name field.
Error Message Authentication timed out. Do you want to retry?
Explanation
LEAP or EAP-FAST authentication failed because the authentication server is down.
Recommended Action Click Retry to try to authenticate again using the same credentials or click
Cancel to cancel the operation.
Error Message Cannot load oemres.dll.
Explanation
The oemres.dll file cannot be installed.
Recommended Action Uninstall the current client adapter software; then install the latest release.