ENCRIPTION PROBLEM

nishanthjavvadi1 — Mon, 05 Jul 2021 06:52:41 GMT

I am using windows8 for sum PC in my office they are not able to connect to my Acces point, We had this issue befor we change the encription to TKIP from AES. It was working fine now agin i am facing the same issue can you please help me out with this.

ENCRIPTION PROBLEM

Sandeep Choudhary — Tue, 31 Dec 2013 07:47:55 GMT

Hi Nishant,

Can u please paste the output of this command:

debug client <mac address>

Regards

ENCRIPTION PROBLEM

Rasika Nayanajith — Tue, 31 Dec 2013 09:56:05 GMT

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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