I'm trying to figure out how to do multicast IP over PPP. More specifically, how to get the MULTICAST interface flag set for a PPP network interface. I searched through the mailing list archives and found no direct answer to my question, but I did find numerous examples that had been sent in of 'ifconfig' output that showed the MULTICAST flag being set for a PPP interface. My expectation was that if multicast support was compiled in to the kernel, then the network interfaces would have the multicast flag set. My Ethernet interface has its multicast flag set for instance. I've looked at the multicast and ppp howto's, read some code in the kernel, read the net-3 howto, etc., looked through all the /etc/init.d files for this and haven't been able to find anything.
I'm using kernel 2.0.36, with the following kernel options set: Network firewalls: yes Network aliasing: yes TCP/IP networking: yes IP forwarding/gatewaying: yes IP multicasting: yes IP firewalling: yes IP masquerading: yes IP tunneling: yes IP multicast routing: yes among others. Can anyone give me a lead to investigate this? Thanks...
