Trap in a narrow sense refers to "trap is a warning message sent to the SNMP manager to inform the network status" in snmp trap. Corresponding notification.

snare

Trap is one of the five data types of snmp protocol, which reflects the necessary actions of the agent process. Its information includes seven types, namely 0 = cold start,

1 = hot start,

2 = Link down,

3 = connected,

4 = Authentication failed,

5=egpneighborloss，

6 = Specific enterprise.

Its sending port is 162, which is UDP and has no return value.