Description of the problem

After Huawei SDH transmission equipment is upgraded, the crossover board enters the bios state, and the master reports the BIOS_STATUS alarm (the first parameter indicates the slot number of the board in the bios state), and the crossover reports the COMMUN_FAIL alarm.

Processing

See Problem Causes and Solutions.

Root Cause

For SSN1GXCSA, SSN1EXCSA, SSN1UXCSA, SSN1UXCSB veneer boards, the base BIOS version of 2.13 and before does not support the extended BIOS version of 2.32 and later (R8 and later), so if the SSN1GXCSA, SSN1EXCSA, SSN1UXCSA, SSN1UXCSB 单板升级前的基础BIOS为2.13及之前的版本，而目标版本的扩展BIOS为2.32及之后的版本，此时应先升级基本BIOS（确保待升级基本BIOS目标版本为2.14及之后），再进行模拟包升级。 Otherwise, it will cause the single board to enter the BIOS state because the old base BIOS is not compatible with the new extended BIOS.

Solution

Load the r3 version of the emulation package and upgrade only the problematic cross boards, don't select other single boards:

If the analog package can not be loaded, use the board level method to load the r3 version of the veneer software, if there is no problematic veneer in the list, then "Add Veneer..."

After upgrading, first use the board-level method to upgrade the base bios of the r8 version of the problematic veneer board, and then use the analog package or board-level method to upgrade the problematic veneer board to the r8 version after the upgrade is completed.

Suggestion and Summary

Upgrade the basic BIOS of Huawei SDH transmission equipment first (make sure that the target version of the basic BIOS to be upgraded is 2.14 or later), and then upgrade the analog package.