Uncle Jim wrote:
I'm not a multicast expert (or even multicast user) BUT my guess is that the proper command should be:
/sbin/route add -net 224.0.0.0 netmask 240.0.0.0 dev eth0
This is not to say that Monty's command wouldn't work but that this is the more general command for the 224.0.0.0/4 (224.0.0.0 - 239.255.255.255) multicast network.
You could also make your life easier by using the (common) iproute2 tools. With them you can use CIDR notation (a.k.a. "slash notation") for IP network addresses. I honestly haven't been using route and ifconfig for a couple years now, the newer tools are just as common and more feature-rich.
~Bradley