Hi @george1421,
With the change made by my workmate @Fernando-Gietz, regarding to the use of a multicast data address, we have improved the througput when there are serveral multicast tasks running at the same time. So you can mark this as solved (I don’t find how to do it).
We are now focusing our attention on mysql tunning. Because (as you pointed) with the course started the polls of the fog clients on the hosts bring our CPUs “to the red zone”.
Only for keep the information on the post: I “remember” (I am back from holidays today) that our colleage from network team told me about IGMP: v3 can avoid delivering multicast packets from specific sources to networks where there are no interested receivers, but v2 can’t. And, our router is running IGMP v2.
COMPARISON OF IGMPV1, IGMPV2 AND IGMPV3
Understanding difference between IGMPv2 and v3
Many thanks for your excellent support.