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Cisco Bug: CSCvs31212 - Cisco 3800 APs in 9800: MIC errors observed for CCKM roams in FlexConnect local switch mode

Last Modified

Apr 19, 2020

Products (1)

  • Cisco Aironet 1850 Series Access Points

Known Affected Releases

ap-16.12.2.5

Description (partial)

Symptom:
Observed MIC errors counter increase and uplink client traffic dropped by the AP when MIC errors occurred.
This is randomly observed across multiple roamings.
ap3800i#sh int do 1 | i err

MIC errors:              74 / 0        Unicast Fragments Tx:       74 / 0
WEP errors:              74 / 0        Retries:                    61 / 0
FCS errors:           32164 / 0        TX Failure:                 80 / 0

Conditions:
CCKM dot1x, flexconnect local sw, AP3800
9800 running 16.12.1
Different clients
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