Discovery Server vs Simple Discovery

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Hi!

I'm currently learning discovery server, I understand how it works. BUT when I launch the script to compare SD vs DS (https://docs.ros.org/en/galactic/Tuto...), my results are far away of my hopes. C:\fakepath\discovery_packets.png

I'm on ROS2 Galactic built from sources, I litterally doing the 4 lines which are on the tuto, and adding $ export RMW_IMPLEMENTATION=rmw_fastrtps_cpp

But my results are really stranges.. Do you have same results than me, or not?

Thank you so much!