Wireshark-dev: Re: [Wireshark-dev] how to set capture filters?
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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Tue, 19 Jan 2010 12:51:17 -0800
On Jan 19, 2010, at 12:45 PM, Joshua (Shiwei) Zhao wrote:

> How could I set a capture filter to only capture, e.g, wlan management frames?
> I could not find an exact answer by searching around. I tried sth like
> 'wlan mgt' or 'type mgt' but it didn't work.

On what OS is this?

What's the output of "tshark -v"?

Are you capturing in monitor mode?  Are you getting 802.11 headers, or just Ethernet headers?