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Cisco Bug: CSCum29183 - AP keeps sending frames to PS client after NDP PM1 Ack

Last Modified

Jul 09, 2014

Products (1)

  • Cisco Aironet 3700 Series Access Points

Known Affected Releases

7.4(100.0) 7.6(1.121)

Description (partial)

Symptom:A Cisco AP may attempt to send a data frame to a client even after the client has gone into powersave mode.  I.e. the client sends a null data frame to the AP with PS=1 and the AP ACKs
it, but the AP immediately then sends, or attempts to send, a data frame to that client.

If the client has not yet gone to sleep (or gone offchannel), the client may ACK that data frame.
If it is asleep/offchannel, so that the data frame from the AP is not ACKed, then the AP may send a series of RTS frames, which do not elicit a CTS.
Conditions:Cisco 11n AP with a client that is configured for powersave.
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