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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


Description (partial)

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

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