This is a real pain, but I suppose Cisco would call this a 'feature'. Im not a big fan of this switch, but its a low cost answer for POE and Layer 2 switching (although not too powerful). I have had twice before communications stop (once) and work, then stop (once) because there is this thing called "port security".
So what I think this does is that it is to keep many devices from behind one port from being a problem. That doesnt sound right. I mean, it keeps you from adding a switch that has multiple devices riding on it. Im not sure that sounds right. One more try: I think it is to limit the amount of mac-addresses you can have behind your ESW-524 ports to prevent unwanted devices from being able to get on. In both scenarios, I had to go to the port security page (see below) and select "forward" instead of the default "discard". Once I did this, I was able to get the network back up in both cases. See below where to go to change this. Im thinking Cisco should not do this by default. I guess its like a Microsoft feature. They know better than you do, which is really annoying!
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