7 TroubleshootingIEEE802.1X Authentication Problems and Remedies 7-23RemedyConfirm whether the authentication method specified for the machineand the authentication method specified for the RADIUS server match,and specify the correct authenticationmethod if necessary. is displayed.Cause The server certificate sent from the RADIUS server has expired.Remedy Confirm the expiration date for the server certificate of the RADIUSserver. is displayed.Cause An error occurred when verifying the server certificate sent from theRADIUS server using the CA certificate.Remedy Confirm the contents of the server certificate of the RADIUS server, aswell as the CA certification registered on the machine. is displayed.Cause The machine failed to analyze the server certificate sent from theRADIUS server.Remedy Confirm the server certificate contents of the RADIUS server. is displayed.Cause An error occurred when communicating with the authenticator.Remedy Confirm the authenticator (LAN switch) settings, as well as the RADIUSserver settings.
