Description of the problem

Five sets of Huawei OSN3500 devices form a 2.5G multiplexing segment ring, the ring is normally inverted after the fiber optic cable is interrupted, and the taking segment inversion does not end after the fiber optic cable is repaired, and the OSN3500 N4GSCC masters are double-matched.

Alarm information

PS/APS-INDI

Processing

1. The network administrator queries the multiplexed configuration segment information, and there is no problem;

2、Query the alarm information, after the fiber optic cable is repaired, there is no alarm on the optical board involved in the multiplexed segment;

3, doubt whether due to the optical cable fusion connection error caused by the optical cable repair after the reversal does not recover;

4, turn off the broken fiber involved in the optical board corresponding to the laser to determine whether there is a problem with the cable connection, found that after turning off the laser on one side of the opposite end of the SL16 single-board without any alarm report, query the optical power display is -60;

5, due to SL16 can not receive light does not report LOS alarm, whether due to SL16 board failure caused by the multiplexing segment ring can not be restored, replace the SL16 board, replacement, this site SL16 board still does not report any alarm; exclude the possibility of SL16 board failure;

6, SL16 single board does not report LOS alarms, whether due to the main control board failure morning;

7, command line query, found:

:errlog

ResetLog:: total reset times = 32

No.0: 1990-1-1 0:0:0

BOARD=17 TYPE=0xf0000004 SOFTTYPE=1

No.1: 2006-7-4 10:54:50

BOARD=18 TYPE=0xf0000004 SOFTTYPE=1

No.2: 2006-7-4 11:15:59

BOARD=18 TYPE=0xf0000010 SOFTTYPE=1

No.3: 2006-7-5 15:40:26

BOARD=18 TYPE=0xf0000004 SOFTTYPE=1

No.4: 2006-9-18 19:34:58

BOARD=18 TYPE=0xf0000004 SOFTTYPE=1

No.5: 2006-9-19 11:57:35

BOARD=18 TYPE=0xf0000004 SOFTTYPE=1

No.6: 2006-10-14 8:48:17

BOARD=18 TYPE=0xf0000010 SOFTTYPE=1

No.7: 2008-1-10 0:1:19

BOARD=18 TYPE=0xf0000010 SOFTTYPE=1

No.8: 2008-11-20 18:4:9

BOARD=18 TYPE=0xf0000010 SOFTTYPE=1

No.8, the fault time period is not stopped and not recorded, query record code TYPE=0xf0000010 SOFTTYPE=1, for soft dog reset;

9, dial down this reset master control board, query the reuse section in the reverse recovery state, disconnect the pigtail SL16 single board LOS can also be reported normally.

Root cause

Because the Huawei OSN3500 GSCC main control board keeps resetting, the multiplexing segment protection inversion cannot be restored.

The related technical information in this chapter and the troubleshooting process of SDH equipment are collected and organized by Shenzhen Optical Transmission Network Technology Company Limited ( www.opticaltrans.com), please retain the reproduction! Our company specializes in Huawei SDH optical transmission equipment, SDH transmission equipment sales.