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I think it is good that someone comes up with an idea that seems so outrageous and so far fetched that it is really challenging to aim for.
We need another "We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too. "
Some switches seem to have a multicast problem: we've downed very fancy cisco switches recently (can't recall the number right now) with igmp/multicast traffic.
We've had a couple of hundred embedded systems that were announcing themselves on the network with mdns. That in itself is only a very low amount of traffic.
Probably some management software triggered a slight increase in reporting, but with a couple hundred embedded systems, this was enough.
mc traffic/igmp does not seem to be hardware accelerated; being routed to the main switch CPU -> maxed out.
Disabling mdns 'solves' the problem.
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Let me spell it out: because *corporate* IT is fully Windows based; if it's not windows, most of them don't understand it (and don't support it, but that's fine). That's what is sad about the situation :(
I thought it was obvious, but I have that problem some times.