Cisco WAP121 Administration Manual page 177

Deauthentication Message Reason Codes
Cisco Small Business WAP121 and WAP321 Wireless-N Access Point with PoE
Reason code Meaning
11 Disassociated because the information in the Supported
Channels element is unacceptable
12 Disassociated due to BSS Transition Management
13 Invalid element, i.e., an element defined in this standard for
which the content does not meet the specifications in Clause 8
14 Message integrity code (MIC) failure
15 4-Way Handshake timeout
16 Group Key Handshake timeout
17 Element in 4-Way Handshake different from (Re)Association
Request/Probe Response/Beacon frame
18 Invalid group cipher
19 Invalid pairwise cipher
20 Invalid AKMP
21 Unsupported RSNE version
22 Invalid RSNE capabilities
23 IEEE 802. 1 X authentication failed
24 Cipher suite rejected because of the security policy
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