Description of the problem

First-line engineers query the OSN3500 N3SL16A single board performance found that the OSPITMPCUR value is not 84.9 degrees, the temperature has exceeded the upper limit of the operating temperature of the single board, but the single board has no temperature anomaly alarm, the relevant version is as follows:

BOARD-VER-INFO

PCB Version : SSN3SL16A VER.

BIOS Version : 2.19

ExtBIOS Version : 2.34

Software Version : 5.12

Logic Version : (U21)110

#9-26:szhw [MADHYAM GRAM ][][2011-11-08 16:28:22+05:30]>

sleep 1

:cfg-get-bdverinfo:12.

BOARD-VER-INFO

PCB Version : SSN3SL16A VER.

BIOS Version : 2.19

ExtBIOS Version : 2.34

Software Version : 5.12

Logic Version : (U21)110

Alarm Information

No

Processing

We can query the temperature of the optical module with the following command to confirm whether the performance value exceeds the upper limit of the temperature of the optical module.

:optp:bid,00,9b,01,30,08,c6,c6,c6,3c,3c,3c.

:optp:bid,00,9b,01,08,13,01,04

:optp:bid,00,9b,01,30,08,e7,e7,e7,a5,a5,a5.

Example:

:optp:6,00,9b,01,08,13,01,04

Optp cmd : 0813

01 04 04 f6 fb 00 //0x04f6 = 1270 (decimal) Indicates that the default upper temperature limit of the optical module of this single board is 127 degrees.

If you query the performance and find that the working temperature of the optical module has exceeded the upper limit of the default temperature of the optical module, we can solve the problem by replacing the optical module or changing the board.

Root Cause

The performance OSPITMPCUR value indicates the laser temperature value, not the single board temperature, the current network query temperature does not reach the upper limit of the laser temperature, so there is no abnormal alarm reported.

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