The standard loading involves the launch of SNMP agent, as well as sub-agents, which support appliance functionality.
After start-up and communication between the agent and sub-agent, the agent processes incoming requests from the network management station (manager) - SNMP PDU (Protocol Data Units), such as Get-PDU, GetNext-PDU, Set-PDU etc., and generates a reply confirmation or Trap-PDU.
PDU Traps are specified in the monitoring system dynamically. The logic is used to link trap messages to the monitoring system events.