BD_STATUS and COMMUN_FAIL alarms are reported on all service processing boards on Huawei OSN3500 network elements

There is a LAN Switch communication module on the AUX veneer, and inter-veneer communication is realized through the AUX veneer. When communication failure alarms occur on most of the veneers, AUX veneer failure should be considered first.

Products

OptiX OSN 1500

Fault category

COMMUN_FAIL

BD_STATUS

Description

OSN1500 is configured with dual-crossover/master control boards Q2CXL16, N1SLQ1, N1SLQ4, interface boards D12B, PD1, power supply board PIU, and communication processor board AUX. all single boards except D12B and Q2CXL16 report BD_STATUS and COMMUN_FAIL alarms.

Cause Analysis

Analyzing the alarm parameters collected from each board, 0x03 indicates that the Ethernet communication between the boards is faulty, and it can be judged that the COMMUN_FAIL alarms of each board are caused by the Ethernet port. the AUX board also reports BD_STATUS alarms, while the crossover/master board does not report any alarms. Therefore, it is determined that the AUX single board has a communication failure with each line board.

The Ethernet communication of the AUX single board is divided into two VLANs based on the ports, one for the master single board and one for other single boards. When the AUX veneer has a communication port failure with the veneer that is not the main control, there is a phenomenon that all line veneers report COMMUN_FAIL and BD_STATUS alarms, while the main control veneer does not report this alarm. Therefore, it is concluded that the port on which the AUX veneer communicates with other veneers has failed.

Operation Procedure

After replacing the AUX single board, the alarms of each single board disappear and the fault is eliminated.