EAP-Request Max Retries.......................... 2
EAPOL-Key Timeout (milliseconds)...................... 400
EAPOL-Key Max Retries............................ 4
If using 802.1x or WPA/WPA2, the EAP-Request Timeout on the Cisco Unified Wireless LAN Controller should be set to at
least 20 seconds.
In later versions of Cisco Unified Wireless LAN Controller software, the default EAP-Request Timeout was changed from 2 to
30 seconds.
To change the EAP-Request Timeout on the Cisco Unified Wireless LAN Controller, telnet or SSH to the controller and enter
the following command.
(Cisco Controller) >config advanced eap request-timeout 30
If using WPA/WPA2 PSK then it is recommended to reduce the EAPOL-Key Timeout to 400 milliseconds from the default of
1000 milliseconds with EAPOL-Key Max Retries set to 4 from the default of 2.
If using WPA/WPA2, then using the default values where the EAPOL-Key Timeout is set to 1000 milliseconds and EAPOL-
Key Max Retries are set to 2 should work fine, but is still recommended to set those values to 400 and 4 respectively.
The EAPOL-Key Timeout should not exceed 1 second (1000 milliseconds).
To change the EAPOL-Key Timeout on the Cisco Unified Wireless LAN Controller, telnet or SSH to the controller and enter
the following command.
(Cisco Controller) >config advanced eap eapol-key-timeout 400
To change the EAPOL-Key Max Retries Timeout on the Cisco Unified Wireless LAN Controller, telnet or SSH to the
controller and enter the following command.
(Cisco Controller) >config advanced eap eapol-key-retries 4
TKIP Countermeasure Holdoff Time
TKIP countermeasure mode can occur if the access point receives two Message Integrity Check (MIC) errors within a 60
second period. When this occurs, the access point will de-authenticate all TKIP clients associated to that 802.11 radio and
holdoff any clients for the countermeasure holdoff time (default = 60 seconds).
To change the TKIP countermeasure holdoff time on the Cisco Unified Wireless LAN Controller, telnet or SSH to the
controller and enter the following command:
(Cisco Controller) >config wlan security tkip hold-down <nseconds> <wlan-id>
To confirm the change, enter show wlan <WLAN id>, where the following will be displayed.
Tkip MIC Countermeasure Hold-down Timer....... 60
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