Or, click
Refresh 
to reset the configuration before applying
802.1X Configuration interface
Parameters Configuration
Reauthentication Enable: To enable the
Reauthentication period (1~3600 seconds): Set the period of time after which clients connected must be
EPA Timeout (1~255 seconds): Set the period of time the switch waits for a supplicant response to an EAP request
And then, click Apply 
to apply the configuration
Or, click
Refresh 
to reset the configuration before applying
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