Wireshark-users: Re: [Wireshark-users] Destination capture filtering not working
From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Fri, 04 Jan 2008 13:14:14 -0800
Cliff Fogle wrote:

Thanks!  It was the vlan bit.  I was assuming the forwarding switch
would send the mirrored packets stripped of any tags.

I think the idea of port mirroring is to let you see traffic in as raw a fashion as possible, so I'm not surprised that it's not stripping tags.