Problem description

5 sets of OSN3500 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 master is double-matched.

Alarm messages

PS/APS-INDI

Processing

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

2、Query the alarm information, after the fiber optic cable repair multiplexing segment involves the optical board without any alarm;

3, doubt whether due to optical cable fusion welding wrong connection led to optical cable repair after the reversal does not recover;

4, turn off the fiber breakage 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 alarms, whether due to SL16 board failure caused by multiplexing segment ring can not be restored, replace the SL16 single board, replacement, this site SL16 single board still does not report any alarms; to rule out the possibility of SL16 single board failure;

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

8、Failure time period non-stop there is no record, query record code TYPE=0xf0000010 SOFTTYPE=1, for soft dog reset;

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

Root cause

As the main control board keeps resetting, the multiplexing segment protection inversion cannot be recovered.

Recommendations and Summary

No