20027 Abnormal Subrack Information

Description

The current subrack information is inconsistent with the initial subrack information

Alarm ID	Alarm Severity	Alarm Type
20027	Major	Fault

ID	Name	Meaning
1	Subrack No.	Subrack No.
2	Slot No.	Slot No.
3	Cpu No.	CPU No.
4	Current subrack information	Subrack information read from board currently
5	Initial subrack information	Subrack information read from board when board boots up
6	Alarm Attribute	0=Normal, Alarms period are longer than the Transient Threshold. 1=Transient Count, The times and the period of the alarms whose periods are shorter than the Transient Threshold are summed up. If the sum result is longer than the Alarm Occurrence Period Threshold or Alarm Occurrence Times Threshold, an alarm so called Transient Count Alarm is triggered. Because Transient Count Alarm is based on accumulative result, the recovery of the alarm may occur at least one Summing Cycle later. The Summing Cycle can be query by MML "LST STATSLDWIN".

If the board is not reset, the service will not be affected.
If the board is reset, it might not be normally started or the service over the board might not be normally proceeded after normal startup.

None.

Check whether the alarm occurs to the boards in the concerned subrack.
Y => The alarm occurs to more than one board. Go to 2.

N => The alarm occurs to only one board. Go to 3.
Check whether the subrack DIP switch is manually changed.
Y => The subrack DIP switch is manually changed. Resume the correct setting and the alarm handling is complete.

N => The subrack number is not changed. Please contact Huawei Customer Service Center.
Securely insert the board and check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Go to 4.
Replace the board and wait until the board is successfully restarted. Check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Please contact Huawei Customer Service Center.