>Hi Ming Ann, >
>>On Wed, Mar 6, 2013 at 4:59 PM, MingAnn Ng <[email protected]> wrote: >> Hi Thomas and Yeoh, >> >> >> I have successfully compile compat-driver-3.8-1 and run it on my >> system. I'm having 3 nodes near to each other and the signal strength >> between them are about 45dBm to 65dBm. From a particular node, I >> continuously ping the other two nodes for more than 14hours. Ping >> result to one of the nodes has no duplication and packet loss. Ping >> result for the other node are: out of >> 50453 packet received, there are 590 duplicated without any packet loss. > >To test our hypothesis that the HW is passing data frames with an RA that doesn't match, can you please repeat your experiment >with the attached patch applied? If our guess is correct you should not receive any more duplicate frames, and notice a warning in >dmesg each time a duplicate frame would have been received. > >-- >Thomas Hi Thomas, Glad to know that there a possible fix for this issue. Thanks for the effort. First of all, I have tested with 3 units where they are just a few inches away from each other. They ping test is from a particular node to its neighbour nodes in which are a single hop away. The ping duplication is still happening in this case. Out of 50000+ ping, there are 500+ duplication. Is the patch you provided applicable for single hop topology as well? The duplication is worsen when I added a node which is two hop away from the node I run the ping test. The path change in this case is very frequent. The above test was conducted using a SparkLAN WiFi module (ar 9160). I have then change the WiFi module to Winstron (ar9220) and surprisingly the duplication is significantly reduced. From 50000+ ping, there are only 20-30 duplication. Will the duplication caused by hardware that we chose? Thanks,Ming Ann
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