atheros (ath) - duplicate packets with long distance link

Sam Leffler sam at
Mon Nov 24 11:20:01 PST 2003

On Monday 24 November 2003 09:07 am, Barney Wolff wrote:
> Off-the-wall suggestion:  run tcpdump -e and check whether both responses
> are coming from the same host.  Unless you're running WEP, you many have
> an unexpected guest.  (WEP is no guarantee, but it's better than nothing.)

Better, use

tcpdump -e -i ath0 -y IEEE802_11

and verify the 802.11 frames are actual duplicates.  They should not be unless 
there's a bug in the duplicate suppression logic in the 802.11 code.


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