According to the feedback of a customer, certain cleared alarms cannot be displayed on a third-party OSS that is interconnected to the N2000 BMS of Huawei. The customer requires Huawei to help locate the fault.
N2000 BMS version: V200R011C03B036
1. Use the snoop tool to capture packets between the N2000 BMS and the OSS, and between the N2000 BMS and the test device.
2. Generate an alarm on the test device. Then, the N2000 BMS receives and displays the alarm in the normal state.
3. Clear the alarm on the test device. Then, the alarm is cleared on the N2000 BMS. In this case, stop capturing packets.
4. The preceding symptoms indicate that the interactivity between the N2000 BMS and the test device is normal. Hence, the fault is located to the interconnection between the OSS and the SNMP NBI. The OSS can still receive certain alarms. Hence, the fault is not caused by the startup of the SNMP NBI.
5. Analyze the packets captured between the N2000 BMS and the OSS, and it is found that the N2000 BMS forwards the alarm and the cleared alarm of the test device through the SNMP NBI. The OSS, however, can display the fault alarm but cannot display the cleared alarm. That is, the fault alarm can reach the OSS. Hence, the cleared alarm cannot be lost in the network.
6. Analyze the MIB of the cleared alarm, and it is found that the MIB cannot be identified by the third-party OSS. Hence, the OSS discards the cleared alarm.
7. After the problem with the OSS is solved, the OSS can display all the alarms sent by the N2000 BMS of Huawei.
Certain alarms sent by the N2000 BMS cannot be identified by the OSS and thus cannot be displayed on the OSS because of problems with the MIB node of the OSS.
In the case of the faults with the interconnection between the N2000 BMS and the OSS, you can locate the faults from different aspects. Do not focus only on the N2000 BMS of Huawei.