What does this error mean: “Multicast Encryption Mismatch”?

By AnandKumar Sukumar posted Jul 03, 2014 01:49 PM


Product and Software: This article applies to all Aruba controllers and ArubaOS versions.


Mar 15 05:07:28 :501068: <WARN> |stm| Source: 00:22:fb:40:a4:84 Failed AP Multicast Encryption Mismatch

This error means that a user has entered the wrong preshared key for a WPA or WPA2 preshared key network, or it could be a driver-related issue.

If you are seeing this message, the client with the WLAN MAC address mentioned as source (in this case, 00:22:fb:40:a4:84) is trying to associate with an incorrect preshared key or is having a driver-related issue.

Further isolation can be done by rechecking the key and also by connecting from a client with different driver or chipset.

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