Hi,

I have 2 subnets residing on 2 vlans. Inter-vlan routing is done from a centos installation i have. So i have eth0.10 and eth0.20. On one network i have a device that sends multicast udp packets and i would like to receive them on the other network. On the rputer, i have a default allow ip table rule and traffic gets forwarded correctly across both networks except for multicast.

I read about pimd, igmpproxy, mrouted etc... but i dont understand why i would need a daemon to accomplish that. Isnt there a way, with iptables to just says "whatever you get on eth0.10 with destination 240.242.242.242, forward it on eth0.20 and let the switch flood it everywhere" ? i just want the simplest way to accomplish this and not necessarly the most efficient way.

Thanks,