https://i.imgur.com/syUwpFP.png
One large network. No routers.
S1 and S2 each have two streams: Stream 1 and 2 from S1, and Stream 1 and 2 from s2.
They use the same multicast groups, but different port numbers to distinguish streams.
-IGMP snooping activated on all switches. querier timeout 120 sec.
-2x static multicast address configured in all switches
Initially, all PCs can subscribe to all streams.
After a while, we start to see the IGMP subscription getting dropped randomly. Sometimes from 1 PC, sometimes from several, and occasionally from all. After 120 seconds they resubscribe and the feed returns.
Switches are moxa industrial eds 5 series running firmware 4.022. I know there is a newer, but the changelog does not state any changes regarding IGMP.
I don't see any IGMP unsubscribe packet get sent from the PC, before this happens.
any ideas to why this can be happening?
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