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Cisco Bug: CSCuj40542 - AP does not hear valid Block Ack frame and repeats sending AMPDU frame

Last Modified

Mar 05, 2014

Products (1)

  • Cisco Aironet 3700 Series Access Points

Known Affected Releases

15.2(4)JA 7.5(102.0)

Description (partial)

Symptom:
AP does not hear Block Ack frames sent from some clients.
It causes severe low throughput for downstream.

Conditions:
Aggregation (A-MPDU) is enabled on the radio. 
It's observed under some high load (approx. 20 or more clients having multiple real time streaming on the same AP.
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