Hi Jason, thanks for your reply..
I have already configured the switch to send trap and i can see in Netsight the trap come from the switch when ,for example, i plug-unplug a link or a ethernet port. But my question is another: What are trap generated "by default" and what no? How can i know if, for example, trap for a "fan failure" or "topology change" is generated by the switch if the event occour?