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Cisco Bug: CSCvu91287 - Observing 'TKIP MIC Error event detected by radio' and 'Failed to valid incoming MIC in reassoc req'

Last Modified

Sep 23, 2020

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases

ap-16.12.3.13 ap-17.4.0.80

Description (partial)

Symptom:
On AP console we see below messages

[*07/06/2020 18:14:06.6393] CLSM[1C:DF:0F:1F:DE:F9]: Failed to valid incoming MIC in reassoc req
[*07/06/2020 18:15:03.3829] CLSM[1C:DF:0F:1F:DE:F9]: Failed to valid incoming MIC in reassoc req
[*07/06/2020 18:15:15.4496] CLSM[1C:DF:0F:1F:DE:F9]: Failed to valid incoming MIC in reassoc req
[*07/06/2020 18:15:56.8327] CLSM[1C:DF:0F:1F:DE:F9]: Failed to valid incoming MIC in reassoc req

*07/06/2020 14:27:55.7048] CLSM[24:77:03:40:05:E8]: TKIP MIC Error event detected by radio
[*07/06/2020 14:28:19.6943] CLSM[24:77:03:40:05:E8]: TKIP MIC Error event detected by radio
[*07/06/2020 14:28:44.3672] CLSM[24:77:03:40:05:E8]: TKIP MIC Error event detected by radio

Conditions:
WLC platform: C9800-CL-L9 [CUST-SPECIAL:V1612_3_ES16]
AP image version: 16.12.3.136
Setup details:
                WLC - WAN [100ms delay] - 8+ APs - 15+ clients
 
Topology:
 C9800-CL - 9.x switch - Pagent [100ms delay] - AP switch1 - AP switch2]
AP models [two AP2800, one 1832, one 1852, one 9115, three 9120]
15+ client shuffled
 
 
 WAN delay : 100 ms
  WLAN details
'Central auth + local switching' - [TKIP, AES] PSK wlan [pthakku-tkip]
'Central auth + local switching' -  [TKIP,AES] dot1x wlan [pthakku-dot1x]
'Central auth + local switching' -  open wlan [pthakku-open]
 
Client details: 
Phones [+ few laptops] connected to above WLANs
 
Traffic:
            Multicast, TSPEC phone [skinny protocol]
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