title: Wireshark: Filter by Multicast in GUI
body: <p>Using the Wireshark "Filter" field in the Wireshark GUI, I would like to filter capture results so that only multicast packets are shown. </p>
  
  <p>I've seen <a href="https://stackoverflow.com/questions/9728285/sending-multicast-udp-by-gcdasyncudpsocket-fails-no-activity-in-wireshark">this post</a> but that doesn't work for the GUI filter field. <a href="http://wiki.wireshark.org/CaptureFilters" rel="noreferrer">This Wireshark page</a> shows how to filter out multicast, but not how to filter everything <em>but</em> multicast.</p>
  
  <p>Does anyone know of a simple statement that will do this?</p>
  
  <p>Thank you in advance!</p>