====== 802.11 Deauthentication Reason Codes ======


^Client Reason Code^Description ^Meaning ^Poor Man Explaination ^
| 0|noReasonCode|Normal operation.||
| 1|unspecifiedReason|Client associated but no longer authorized.|We don’t know what’s wrong|
| 2|previousAuthNotValid|Client associated but not authorized.|
| 3|deauthenticationLeaving|The access point went offline, deauthenticating the client.|Deauthenticated because sending STA is leaving (or has left) IBSS or ESS|
| 4|disassociationDueToInactivity|Client session timeout exceeded.|Disassociated due to inactivity|
| 5|disassociationAPBusy|The access point is busy, performing load balancing, for example.|Disassociated because AP is unable to handle all currently associated STAs|
| 6|class2FrameFromNonAuthStation|Client attempted to transfer data before it was authenticated.|Class 2 frame received from nonauthenticated STA|
| 7|class2FrameFromNonAssStation|Client attempted to transfer data before it was associated.|Class 3 frame received from nonassociated STA|
| 8|disassociationStaHasLeft|Operating System moved the client to another access point using non-aggressive load balancing.|Disassociated because sending STA is leaving (or has left) BSS|
| 9|staReqAssociationWithoutAuth|Client not authorized yet, still attempting to associate with an access point.|STA requesting (re)association is not authenticated with responding STA|
| 10|Disassociated because the information in the Power Capability element is unacceptable||
| 11|Disassociated because the information in the Supported Channels element is unacceptable||
| 12|Reserved|Not Used or Special Purpose||
| 13|Invalid information element.||
| 14|Message integrity code (MIC) failure||
| 15|4-Way Handshake timeout||
| 16|Group Key Handshake timeout||
| 17|Information element in 4-Way Handshake different from (Re)Association Request/Probe Response/Beacon frame||
| 18|Invalid group cipher or Association denied due to requesting STA not supporting all of the data rates in the BSSBasicRateSet parameter|*NEW* The link speed requested by the client or AP is incompatible. (i,e. trying to operate N only speeds on a G AP)|
| 19|Invalid pairwise cipher||
| 20|Invalid AKMP||
| 21|Unsupported RSN information element version||
| 22|Invalid RSN information element capabilities||
| 23|IEEE 802.1X authentication failed||
| 24|Cipher suite rejected because of the security policy||
| 25-31|Reserved|Not Used or Special Purpose|
| 32|Disassociated for unspecified, QoS-related reason|Quality of Service has denied the action.|
| 33|Disassociated because QoS AP lacks sufficient bandwidth for this QoS STA|
| 34|Disassociated because excessive number of frames need to be acknowledged, but are not acknowledged due to AP transmissions and/or poor channel conditions||
| 35|Disassociated because STA is transmitting outside the limits of its TXOPs|
| 36|Requested from peer STA as the STA is leaving the BSS (or resetting)
| 37|Requested from peer STA as it does not want to use the mechanism 	
| 38|Requested from peer STA as the STA received frames using the mechanism for which a setup is required||
| 39|Requested from peer STA due to timeout||
| 45|Peer STA does not support the requested cipher suite||
| 45-65|Reserved|Not Used or Special Purpose|
| 99|missingReasonCode|Typically “No Reason Code” / Unknown State|
| 535|Reserved|Not Used or Special Purpose| 

The first few reason codes where helpful while debugging my wifi related issues.