A unique sequence number for each trap generated by node. The sequence number shall be reset to 1 when node restarts. The alarm sequence number shall be independent of the event sequence number. Each shall be self-governed. The sequence ID of alarm shall be assigned from the order of transmitting trap to the NMS, instead of the order of alarm occurance. Therefore the NMS will receive the continuous sequence ID. 1. When device is in active/standby mode, sequence ID shall be synchronized between active and standby control module. 2. When control module switchover takes place, the current sequence ID shall keep the synchronized value. 3. When device restarts, sequence ID shall start from 1. 4. It shall be increased per alarm trap including both alarm raising and clear. 5. Non-zero value shall be used. When reaches the maximum number, it shall roll back to 1. The sequence ID of event shall be assigned from the order of transmitting trap to the NMS. Therefore the NMS will receive the continuous sequence ID. 1. When device is in active/standby mode, sequence ID shall be synchronized between active and standby control module. 2. When control module switchover takes place, the current sequence ID shall keep the synchronized value. 3. When device restarts, sequence ID shall start from 1. 4. It shall be increased per event trap. 5. Non-zero value shall be used. When reaches the maximum number, it shall roll back to 1.