A notification indicating that number of active sessions on the system exceeded system sessions threshold value. System sessions threshold value is indicated by cPppoeSystemThresholdSessions. An agent must not generate more than one cPppoeSessionThresholdTrap `trap-event` in a 30 second period, where a `trap-event` is the transmission of a single trap PDU to a list of trap destinations. If additional `the number of PPPoE sessions exceeds threshold` condition occur within the 30 second `throttling` period, then these trap-events should be suppressed by the agent. An NMS should periodically check the value of cPppoeCurrSessions to detect any missed cPppoeVcSessionThresholdTrap trap-events, e.g. due to throttling or transmission loss. Where 30 is the `throttling` period of trap-event.