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I have two boxes and I have some issues when tcpreplaying a pcap full of multicast from one machine to the other. I see the packet incoming on the destination machine thanks to a tcpdump instance.

I've checked the multicast is joined (netstat -ag) on the destination machine after launching my client application. I also checked the rp_filter attribute (which is disabled). But the client application never received any data. (While when not using tcpreplay, everything is ok.)

I am running out of idea. So I would like to know whether there is some log files that could help me in knowing why the kernel is discarding those packets. Or any tool? Any idea?

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