10GE LAN link flapping on customer router due to SNCP switch

【Problem Summary】Huawei DWDM 10GE LAN link from Hyderabad to Banaglore flapping on customer router. 【Problem Details】Below is the diagram shown end to end connectivity details :-The end points which is connected to the router is on the LSX cards. You can refer to the PDF for end to end connectvity details.When there is fiber cut in… Read More »

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Rectification Notice of Faulty MOS Transistors on TN51XCS Boards

Summary: Metal-oxide semiconductor (MOS) transistors in a lot used on TN51XCS boards intended for the Huawei OptiX OSN 8800 have a defect. Because of the defect, the noise introduced by the 12 V power supply on the TN51XCS board is out of range and interferes the signals transmitted over the adjacent high-speed buses. This interference… Read More »

How to Prevent a License Defect Flash Exhaustion on the Main Control Board

Abstract: When the license module processes interchange messages for hot standby between the working and protection main control boards, commissioning information will accumulate to the flash and finally exhaust the flash space. As a result, configuration data fails to be saved and database backup fails. [Problem Description] Trigger conditions: Two main control boards are configured… Read More »

Abnormal performance record in tributary board of ONS500

Query performance of tributary board on OSN 500,there has E1 performance in T1 service: :per-get-curdata:9,1,0,1,perall,15m;                                          PER_GET_CURDATA                                                BID   PERIOD  STARTTIME                      EID                   OPPORT  CHAN          VALUE        9     15m     1990-01-03 01:45:00+08:00      t1_les_sdh            1       1             214          9     15m     1990-01-03 01:45:00+08:00      t1_lses_sdh           1       1             214          9     15m     1990-01-03 01:45:00+08:00      e1_les_sdh            1       1             214   //E1 performance      9     15m     1990-01-03 01:45:00+08:00      e1_lses_sdh           1      … Read More »

Be aware of SSN3PSXCSA replace Cross-connect Board on OptiX OSN 3500

Summary: When an SSN3PSXCSA (Ver.B) board is used to replace another cross-connect board, after the SSN3PSXCSA (Ver.B) board is inserted into the subrack, the state of the original active cross-connect board is abnormal and NE services are interrupted. After about 40s, the state of the original active board is back to normal and services recover.… Read More »

Cautions for Drive Failure on the SSX2T2TM Module

Summary: A 10G OTU board reports an OTU2_LOF alarm at a low probability on the Huawei WDM side during the running. When this alarm is reported, services are interrupted and the alarm persists. [Problem Description] Trigger conditions: This problem has no external trigger conditions, and occurs at a 1% probability during normal running. Symptom: An… Read More »

Pay attention to Optical Power Reporting of Modules in WDM Products

Summary: When fibers on boards that use the HXFP8240, HXFP8440, or HXFP8441 pluggable module on dwdm huawei boards are being removed or inserted, the reported optical power at the receive end is sometimes lower than the actual optical power. [Problem Description] Trigger conditions: The problem occasionally occurs when customer fibers are removed and re-inserted. Symptom:… Read More »