SNMP traps

SNMP traps

SNMP traps (alarms)

SNMP Traps when Alarm to NMSIf any thermometer's value exceeds the defined range, the sensor will switch to the Alarm and reports this by sending SNMP Trap to the specified IP address.

The trap consists of two SNMP traps for increasing of security and compatibility with other systems.
The format of the packet is described in MIB table, the first packet contains information about Alarm beginning and the second packet contains information about sensor in alarm status.

The alarm is state value so that after alarm termination (for example temperature goes back to the defined range) another two SNMP Traps are transmitted.

The trap system was developed to speed up delivery of information about changes of state because in the classic

SNMP mode - question/answer, the period between each query can last from miliseconds up to several hours. For input contacts it is possible to define sending Alarm at Opening /Closing or the alarm can be disabled completely.

Detailed description and a summary of SNMP Traps can be found in the MIB table. The Poseidon manual contains enhanced description.