On an Ubuntu server you can add the following to /etc/network/interfaces:
# static route
up route add -net 224.0.0.0/4 dev ethX
or
# static route
up route add -net 224.0.0.0/4 gw interfaceIP
X= Interface that want to use multicast
On an Ubuntu server you can add the following to /etc/network/interfaces:
# static route
up route add -net 224.0.0.0/4 dev ethX
or
# static route
up route add -net 224.0.0.0/4 gw interfaceIP
X= Interface that want to use multicast