Question

ISW 16802 8-port PoE - problem transceiver

  • 12 January 2021
  • 2 replies
  • 33 views

Hey,

i have in my network 30 switch ISW 16802. And now 1 switch give this alarm:

ID5657 [EXTREME-512-4F] DDMI-RX_POWER_CHANGED: DoM Rx Power changed to HI WARN on Interface GigabitEthernet ¼

What is problem? It depends by transceiver? Transceiver’s vendor is OEM. But i verified the status of transceiver and your data is ok:

Vendor             : OEM
Part Number        : SFP1G-LX-31
Serial Number      : C2002049642
Revision           :
Date Code          : 2019-02-28
Transceiver        : 1000BASE_LX

DDMI Information
++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
Tx: transmit, Rx: receive, mA: milliamperes, mW: milliwatts.
==========================================================================
              current   High Alarm   High Warn    Low Warn      Low Alarm
                         Threshold    Threshold    Threshold     Threshold
-------------  --------  ----------   ----------   ----------    --------
Temperature(C) 31.019      90.000       85.000       -40.000      -45.000
Voltage(V)     3.2562      3.7950       3.4650       3.1350       2.8050
Tx Bias(mA)    15.832      100.000      95.000       0.000        0.000
Tx Power(dBm)   -6.14       -1.50        -2.00        -10.00       -10.50
Rx Power(dBm)   -1.93 +     -1.50        -2.00        -26.02       -26.58

CAn you help me?

 


2 replies

Thank you very much Ludovico!

I’ll control the fiber patch or transceiver both of this device  and of the one with which it is connected.

hi

 

Userlevel 5

According to 1000BaseLX specs, -3dbm is the max receive power.

https://documentation.extremenetworks.com/pluggable/GUID-36DC6B60-A015-470E-8EB6-3ACE8F4F75F6.shtml

At -1.93dbm you are exceeding that value...

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