Hi Emanuele
Thanks again for the code, now I understand better the concept of IGMP
groups
I used multicast on wan. Our customer wanted this setting.
I see, I will leave an option for my software for the user to configure the
TTL, I´m using default 1 (LAN only)
Using wireshark, when a multicast socket enter in listening state, you
should see igmp packets on the net.
These packets should tell to the switch how to manage multicast
distribution.
On my implementation, I was using Connect instead of Listen for the sender,
so, the sender was not joining the IGMP group, but as I read, the sender is
not required to join an IGMP group just the receivers must join the group in
order to receive multicast data
Using my implementation, what kind of packet distribution do you get?
Broadcast?
I actually get Multicast distribution but since I don´t have a managed
switch over here (that can manage IGMP groups) it works like broadcast, all
machines on the network receive the multicast data (If I setup wireshark on
them I can see) not only the machines who joined the group, because this is
managed by the switch by using IGMP Snooping
Now I have a clearer idea of IGMP, but I would like to know if the sender is
advised to join the IGMP group, or I can have the sender without joining the
group
Thanks
Eric
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