20116 Inter-Board HIG Trunk Communication Failure

Description

The CPU communication with the peer GSCU board fails.

Attribute

Alarm ID	Alarm Severity	Alarm Type
20116	Major	Fault

Parameters

ID	Name	Meaning
1	Subrack No.	Subrack No.
2	Slot No.	Slot No.
3	Cpu No.	CPU No.
4	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".

Impact on the System

The standby GSCU becomes unavailable. The performance of the system degrades.

System Actions

Inhabit all external GE ports on the standby board.

Possible Causes

The peer board is reset.
The heartbeat packets between active and standby switching network boards cannot be processed due to CPU busy.
The local board is faulty.
The peer board is faulty.
The backplane (including slots and circuit) is faulty.

Procedure

Check whether a correlated parent alarm occurs.
Y=> Clear the parent alarm according to the corresponding handling suggestions. Check whether the alarm is cleared.

N=> Go to 2.

Correlated parent alarm

20114 Inter-Board HIG Link Faulty

The three alarms have the same Subrack No. and Slot No. in the alarm location information.

This alarm occurs when 20114 Inter-Board HIG Link Faulty occurs on HIG link 6, HIG link 7, and HIG link 8 at the same time.

The four alarms have the same Subrack No. and Slot No. in the alarm location information.
Check whether the peer board is reset.
Y => The peer board is reset. The alarm is caused by the restoration of the peer board. The alarm handling is complete.

N => The peer board is not reset. Go to 3.
Secure the installation of the local board and the peer board, and then check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Go to 4.
Reset the standby 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. Go to 5.
Replace the local 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. Go to 6.
Switch the active board into standby state on the LMT, and then check whether the switchover succeeds.
Y => The switchover succeeds. Go to 7.

N => The switchover fails. Go to 8.
Wait until the standby board is successfully started, and then check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Go to 9.
Reset the active board and wait until the standby board is successfully started. Check whether the alarm is cleared.
Y => The alarm is cleared. The alarm handling is complete.

N => The alarm persists. Go to 9.
Replace the current standby 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.