client subscribed to a multicast group not receiving data

Posted by Abruzzo Forte e Gentile on Server Fault See other posts from Server Fault or by Abruzzo Forte e Gentile
Published on 2013-06-24T18:49:01Z Indexed on 2013/06/24 22:23 UTC
Read the original article Hit count: 254

Filed under:

linux

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networking

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linux-networking

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multicast

I have a network that was setup for multicast traffic IN Machine A there is a server application generating multi-cast traffic. I have also different clients subscribing to that mulicast traffic -some client are in the same machine A -other clients are in machine B,C,D

# Address I am using
IP  : 239.193.0.21
PORT: 20401

I don't know why but the client in machine A , even if they join the group, don't receive any data while (and this is the funny part) machine B,C and D receive everything.

Checking with Wirshark I can see that the UDP traffic flow is there in Machine A.

I am using LInux/Red-Hat Enterprise 6.2

What should I look at? Any setting in the os? Firewall or what?

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