When a listener misses a message it requests a retransmission from the sender, which then retransmits the message. The problem is excessive retransmissions from a problematic receiver can cause issues on other receivers or even network congestion.
This is specific to your multicast application and from the network perspective, the retransmitted packets are the same as the non-retransmitted ones so we can't isolate them. If the source could mark differently (different IP Prec value) the retransmitted packets then you would be able to police them without impacting the regular traffic.
Of course you should also focus on fixing the issue on your problematic receiver.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...