The SNMP trap mechanism is based on a service without connection (UDP). This means that the transmitter of a trap (the agent) is never sure that it has actually been received by the managers.
The importance of applications protected by UPS has lead MGE UPS SYSTEMS to install an additional acknowledgment mechanism using SNMP between the agent and UM-Client. This mechanism ensures a fully secured exchange between the various components.
The basic principles of this mechanism are as follows:
a mechanism to retransmit the trap is implemented by the agent if it is not acknowledged by UM-Client.