Wireshark-users: Re: [Wireshark-users] Ipw3945 monitor mode
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From: Stephen Fisher <stephentfisher@xxxxxxxxx>
Date: Thu, 25 Oct 2007 10:49:31 -0600
On Thu, Oct 25, 2007 at 04:30:13PM +0200, Palmeri Massimo wrote:

> iwconfig eth1 mode monitor
> iwconfig eth1 channel 9

> It works, but I also see frames from other channels

802.11b/g runs in the 2.4GHz band and each channel in the is 5MHz wide. 
However, when using a channel, the signal spreads 25MHz wide covering 5
channels at once.  This means that means that channel 9 is picking up
traffic from channels 9-13.  This may be why you are seeing traffic from
other channels.


Steve