Symptom

AireOS WLC would fail to reply to 802.11k neighbor request sent by device, i.e scanner msglog would be filled out with messages similar to next: apfMsConnTask_1: : %APF-4-PROC_ACTION_FAILED: apf_80211v.c: Could not process 802.11 Action. Received 11v Action frame through incorrect AP from mobile station. Mobile:XX:XX:XX:XX:XX apfReceiveTask: : %APF-4-MOBILESTATION_NOT_FOUND: apf_ms.c: Could not find the mobile XX:XX:XX:XX:XX in internal database When we enable 11k debug, we get debug queue full errors: apfMsConnTask_6: : %APF-4-PROC_ACTION_FAILED: apf_80211k.c: Could not process 802.11 Action. Received RM 11K Action frame through incorrect AP from mobile station. Mobile:XX:XX:XX:XX:XX apfMsConnTask_1: : %DEBUG-3-MSG_SEND_FAIL: debug.c: DEBUG QUEUE is FULL Packet capture attached to case shows that AP is actually not able to reply to the neighbor request.

Conditions

Noticed on high number of AP scenario +500 AP Apparently it does not affect Apple devices querying for 11k neighbor list This would cause wireless client not to receive neighbor report, however it does not cause operational impact.

Workaround

At this moment there is no workaround

Further Problem Description