On the sender side if I do the following it works for me: 
my $socket = new IO::Socket::Multicast(Proto=>'udp', PeerAddr=>'239.1.
+1.1:9999') or die "cannot create socket: $!\n";
$socket->send("this is multicast");

[download]
See the EXAMPLE section of 'perldoc IO::Socket::Multicast'

In reply to Re: How to properly send and receive data from multicast? by Danny
in thread How to properly send and receive data from multicast? by Anonymous Monk

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