Multicast UDP and Linux

[Rob Elsner]

All,

I've tried both of the examples available from this mailing list about
multicast UDP receiving, namely:
http://forum.trapexit.org/viewtopic.php?t=397&sid=b4530465381e0736d194488b0e2cc48b
and
http://www.nabble.com/Beginner:-Windows-UDP-multicast-receive-td18096904.html

However, I am still unable to get this to function.  If I open VLC
with the same source IP, multicast address and port, it works
correctly.

We are using an IGMPv3 capable router, but I never see an IGMP message
generated from Erlang with gen_udp.

Does anyone have any hints about this?

Thanks,
Rob