11ac packet capture using Wireshark & QCA9880

Okhwan Lee ohlee at mwnl.snu.ac.kr
Wed Nov 5 00:35:59 PST 2014

Hi all, 

We install a station to capture 11ac packets using wireshark. 
The station equips with QCA 9880 and operates  Ubuntu (Kernel version 3.16.1)
We also install backport (3.16.1) to use the emerging ath10k device driver and 10.1.467.2-1 firmware. 

In our testbed, there is three nodes, AP (ASUS AC66), client (QCA9880) and the monitor station (QCA9880). 
The monitor station can capture the packets transmitted by AP but not capture the packets transmitted by the client. 
We use the same parameter settings (MCS~0, 1 streams, 20 MHz bandwidth, BCC, long preamble) on both AP and client, so there may be no packet error or loss. 
We also confirm that the packets transmitted by AP contain VHT information. 
In other word,  the monitor station can capture 11ac packets (VHT-PPDU). 

Is there any reason why QCA 9880 can not capture only packets transmitted by the client equipped with QCA9880?

Okhwan Lee
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