Tag Archives: OSN 7500

Why Broadcast Packets Cannot Be Transmitted Successfully on Several HMSTP Data Boards?

Keywords: OptiX OSN 3500/7500/7500 II, ELAN, LAG, PW, UNI, MSTP Summary: When a physical port on a SSN1PEG8, SSN1PEX2, SSN2PEX1, TNN1EG8, TNN1EG16, or TNN1EX2 board of the OptiX OSN 3500/7500/7500 II in a link aggregation group (LAG) is configured in an ELAN, and the board has only one UNI and one PW interface in the ELAN, some broadcast packets cannot be transmitted successfully in the ELAN.  … Read More »


Troubleshoot Link STM-64 using BPA and DCU in OSN 7500II

Background How to troubleshoot link STM-64 in Huawei transmission equipment OSN 7500II using BPA and DCU because although have followed the theory guidance about power input range below , but there always find alarms B2_SD, B1_SD_B2_EXC, MS_RDI, R_LOF appears in its link (by NMS U2000) Link information and BPA specification1. Link : STM-64 2. Board : SLD64 3. Distance :… Read More »