Multicast playback in packet player

Hello,

I have some problem to play back UDP multicast packets.

The configuration is :
PC_A -- ADSL_Router -- PC_B

PC_A and PC_B do see each other. Ping work and is visible in wireshark on PC_B.

I start a RTP/UDP video stream in PC_A : 235.1.1.10, port 5010.
Wireshark in PC_B does see the stream. I record a pcap of the UDP stream.

Now, I copy pcap on PC_A.
I start playback of pcap on PC_A. But PC_B doesn't see anything. Wireshark is silent.

Am I doing something wrong ? The configuration is the same, and the content of packets are the same. Why can't I see the same packet as 3 minutes ago, sent from the same PC ? Is it a problem of NIC configuration ?

If anyone has an idea, it would help me a lot.

Thank in advance

 

Hi kicest,

Can you post your packet file here?