All things related to multicast

[Bill Owens <>]

On Mon, Oct 19, 2009 at 11:57:24AM -0400, Laurence Kirchmeier wrote:
>       SO the question is - how can one figure out (on a Macintosh or linux 
> box) whether a stream that is being received by the machine is a  
> multicast stream. I know that  "netstat -rn" shows all the active tcp  
> and udp connections.  In that list how might one detect that a stream  
> is a multicast stream.  Is there some other way to figure out if a  
> stream is a multicast stream?

On either platform,

        sudo tcpdump -n ip multicast

ought to do it. If you're receiving multicast, you'll see lots of packets. . .

And of course ^C to get out of it when you've seen enough ;)

Bill.