title: How can I use TCPDump on Unix to view messages sent to a specific multicast address?
body: <p>I'm trying to view traffic transmitted to a specific multicast address on a network in order to analyze a protocol we're using.</p>
  
  <p>I don't have Wireshark available on the setup (unfortunately).  TCPDump is available though.  So, can anyone show me a command have TCPDump filter to only view messages transmitted to a secific multicast group address?</p>