Port-based access control (802.1X)-related problems

NOTE:

To list the 802.1X port-access Event Log messages stored on the switch, use show log 802.

See also Radius-related problems.

The switch does not receive a response to RADIUS authentication requests
The switch does not authenticate a client even though the RADIUS server is properly configured and providing a response to the authentication request
During RADIUS-authenticated client sessions, access to a VLAN on the port used for the client sessions is lost
The switch appears to be properly configured as a supplicant, but cannot gain access to the intended authenticator port on the switch to which it is connected
The supplicant statistics listing shows multiple ports with the same authenticator MAC address
The show port-access authenticator <port-list> command shows one or more ports remain open after they have been configured with control unauthorized
RADIUS server fails to respond to a request for service, even though the server's IP address is correctly configured in the switch
The authorized MAC address on a port that is configured for both 802.1X and port security either changes or is re-acquired after execution of aaa port-access authenticator <port-list> initialize
A trunked port configured for 802.1X is blocked