Hi,
Make sure you are not hitting the below bug (CSCua29504). If you are running affected software please upgrade it to 7.4.121.0 (7.4MR2) which is more stable code at the moment.
https://supportforums.cisco.com/docs/DOC-27213
Symptom:
An 802.11w-capable client, such as a PC running Windows 8, cannot connect to an
SSID using WPA or WPA2 key management with AES encryption. The AP will send the
M1 pairwise key message, but the PC will never respond with M2.
With "debug client" in effect, a message similar to the following will be seen:
*dot1xMsgTask: Jun 12 20:23:37.471: 00:11:22:33:44:55 Retransmit failure for
EAPOL-Key M1
to mobile 00:11:22:33:44:55, retransmit count 5, mscb deauth count 0
Conditions:
Client is 802.11w-capable, wireless infrastructure is CUWN, SSID using WPA2/AES
or WPA/AES. This bug affects CUWN 5.2.178.0 and above, but not CUWN 4.2 or
earlier, nor does it affect autonomous IOS APs.
Workaround:
Use WPA/TKIP or WPA2/TKIP instead. Note that this will limit the client
to 802.11g/802.11a data rates.
Another workaround is to use a Windows 7, rather than Windows 8 driver, for the
adapter.
Known Affected Releases: (5)
7.2(104.20)
7.2(103.0)
7.0(98.0)
5.2(178.0)
6.0(183.0)
Known Fixed Releases: (14)
7.3(1.67)
7.2(110.4)
7.0(235.1)
7.2(111.1)
7.4(1.20)
7.0(236.0)
7.0(230.15)
7.2(111.3)
7.0(235.3)
HTH
Rasika
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