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ISW 16802 8-port PoE - problem transceiver

  • 12 January 2021
  • 2 replies
  • 63 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?

 

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Best answer by Ludovico Stevens 13 January 2021, 17:06

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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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...

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