In this recipe, you'll learn how to configure Nagios Core to process SNMP traps, which is information sent by monitored network devices to a central monitoring server.
Because SNMP traps often contain useful or urgent information about how a host is working, processing them in at least some way can be very helpful. It can be very helpful particularly for firmware network devices that can't use
send_nsca to submit a passive check result in a standard form, as explained in the Submitting passive checks from a remote host with NSCA recipe.
As an example, most SNMP-capable hosts can be configured to send SNMP traps when one of their network interfaces changes state, perhaps due to a pulled network ...