Cisco Bug: CSCtb20125 - CCMP errors on key rotation
Mar 06, 2018
- Cisco Aironet 3700 Series
Known Affected Releases
Symptom: An access point/WGB may log errors similar to the following during data transfer %DOT11-4-CCMP_REPLAY: AES-CCMP TSC replay was detected on a packet (TSC 0xD89FF8) received from 001d.7305.0008." Conditions: Encryption used is AES. The problem happens only when the AP transmits non-aggregated packets while BA exchange is being agreed upon. Hence this is a very rare situation and should not happen frequently. The above error is seen on the receiver while the problem is with the transmitter. So, if you think the AP has this issue, the error log should be seen on the WGB or clients that can display TSC replay errors. Affects only 11n APs (1250/1140/3500).
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Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
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