There is many error message on optical modules saying that the power is too low in Huawei S6700 Switch

Issue Description

There is many error message on optical modules saying that the power is too low in Huawei S6700 Switch
QQ图片20171226164905

Alarm Information

May 23 2014 15:36:09+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[25]:Optical module in interface XGigabitEthernet0/0/7 exception, Rx power is too low.
May 23 2014 15:34:48+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[26]:Optical module in interface XGigabitEthernet0/0/9 exception, Rx power is too low.
May 23 2014 15:34:44+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[27]:Optical module in interface XGigabitEthernet1/0/10 exception, Rx power is too low.
May 23 2014 15:34:44+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[28]:Optical module in interface XGigabitEthernet1/0/5 exception, Rx power is too low.
May 23 2014 15:26:02+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[29]:Optical module in interface XGigabitEthernet0/0/22 exception, Rx power is too low.
May 23 2014 15:26:02+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[30]:Optical module in interface XGigabitEthernet0/0/20 exception, Rx power is too low.
May 23 2014 15:26:02+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[31]:Optical module in interface XGigabitEthernet0/0/19 exception, Rx power is too low.
May 23 2014 15:26:02+01:00 FEDERATEUR-RG %%01SRM/3/RXPOWER_EXCEEDMINOR(l)[32]:Optical module in interface XGigabitEthernet0/0/8 exception, Rx power is too low.

Handling Process

Test the fiber cable if it’s normal or if the Fiber is too winding.
You can change another normal Fiber to these interfaces who have the error message.

The physical fiber cable has problem

I think it is better if you replace it by another good one and test again

Root Cause

only some interfaces have this error message:

In slot 1: XGigabitEthernet1/0/10 and XGigabitEthernet1/0/5
   In slot 0: XGigabitEthernet0/0/7, XGigabitEthernet0/0/8, XGigabitEthernet0/0/9, XGigabitEthernet0/0/19, XGigabitEthernet0/0/20, XGigabitEthernet0/0/22.

The receive power is out of the allowed range

For example:
XGigabitEthernet1/0/5 transceiver information:
**************************************************
Common information:
Transceiver Type               :1000_BASE_SX_SFP
Connector Type                 :LC
Wavelength(nm)                 :850
Transfer Distance(m)           :275(OM1),550(OM2),1000(OM3)
Digital Diagnostic Monitoring  :YES
Vendor Name                    :HUAWEI
Vendor Part Number             :02315204
Ordering Name                  :
————————————————————-
Manufacture information:
Manu. Serial Number            :PQH0QRV
Manufacturing Date             :2013-10-23
Vendor Name                    :HUAWEI
————————————————————-
Diagnostic information:
Temperature(°C)              :21.29
Temp High Threshold(°C)      :95.00
Temp Low  Threshold(°C)      :-25.00
Voltage(V)                    :3.29
Volt High Threshold(V)        :3.90
Volt Low  Threshold(V)        :2.70
Bias Current(mA)              :6.11
Bias High Threshold(mA)       :32.40
Bias Low  Threshold(mA)       :1.55
RX Power(dBM)                 :-17.28    — Too low
RX Power High Threshold(dBM)  :0.00
 RX Power Low  Threshold(dBM)  :-16.98
TX Power(dBM)                 :-4.91
TX Power High Threshold(dBM)  :0.00
TX Power Low  Threshold(dBM)  :-12.50

Suggestions

No

 

 

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