%SFF8472-5-THRESHOLD_VIOLATION: RX

[Jorge Alberto Largaespada Gonzalez]

Hello everyone,

i have this problem on 2 switch 4503E

CORE01

%SFF8472-5-THRESHOLD_VIOLATION: Te1/1: Rx power low warning; Operating value: -13.8 dBm, Threshold value:  -9.9 dBm.

%SFF8472-5-THRESHOLD_VIOLATION: Te1/1: Rx power low alarm; Operating value: -13.9 dBm, Threshold value: -13.9 d dBm.

4503E_CORE01#sh interfaces transceiver

                                 Optical   Optical

           Temperature  Voltage  Tx Power  Rx Power

Port       (Celsius)    (Volts)  (dBm)     (dBm)

---------  -----------  -------  --------  --------

Te1/1        23.9       3.26      -2.2     -14.0  

4503E_CORE01#show inte te1/1  trans det

                              High Alarm  High Warn  Low Warn   Low Alarm

          Temperature         Threshold   Threshold  Threshold  Threshold

Port       (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)

--------- ------------------  ----------  ---------  ---------  ---------

Te1/1       24.1                75.0        70.0         0.0       -5.0

                              High Alarm  High Warn  Low Warn   Low Alarm

           Voltage            Threshold   Threshold  Threshold  Threshold

Port       (Volts)            (Volts)     (Volts)    (Volts)    (Volts)

---------  ---------------    ----------  ---------  ---------  ---------

Te1/1      3.26                  3.60        3.50        3.10       3.00

           Optical            High Alarm  High Warn  Low Warn   Low Alarm

           Transmit Power     Threshold   Threshold  Threshold  Threshold

Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)

---------  -----------------  ----------  ---------  ---------  ---------

Te1/1       -2.2                 1.6        -1.3        -7.3      -11.3

           Optical            High Alarm  High Warn  Low Warn   Low Alarm

           Receive Power      Threshold   Threshold  Threshold  Threshold

Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)

-------    -----------------  ----------  ---------  ---------  ---------

Te1/1      -13.9                 1.9        -1.0        -9.9      -13.9

CORE02

%SFF8472-5-THRESHOLD_VIOLATION: Te1/1: Rx power low warning; Operating value: -13.5 dBm, Threshold value:  -9.9 dBm.

%SFF8472-5-THRESHOLD_VIOLATION: Te1/1: Rx power low warning; Operating value: -13.5 dBm, Threshold value:  -9.9 dBm.

4503E_CORE02#sh interfaces transceiver       

                                 Optical   Optical

           Temperature  Voltage  Tx Power  Rx Power

Port       (Celsius)    (Volts)  (dBm)     (dBm)

---------  -----------  -------  --------  --------

Te1/1        27.5       3.24      -2.3     -13.5  

4503E_CORE02#show inte te1/1  trans det

                              High Alarm  High Warn  Low Warn   Low Alarm

          Temperature         Threshold   Threshold  Threshold  Threshold

Port       (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)

--------- ------------------  ----------  ---------  ---------  ---------

Te1/1       27.4                75.0        70.0         0.0       -5.0

                              High Alarm  High Warn  Low Warn   Low Alarm

           Voltage            Threshold   Threshold  Threshold  Threshold

Port       (Volts)            (Volts)     (Volts)    (Volts)    (Volts)

---------  ---------------    ----------  ---------  ---------  ---------

Te1/1      3.24                  3.60        3.50        3.10       3.00

           Optical            High Alarm  High Warn  Low Warn   Low Alarm

           Transmit Power     Threshold   Threshold  Threshold  Threshold

Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)

---------  -----------------  ----------  ---------  ---------  ---------

Te1/1       -2.1                 1.6        -1.3        -7.3      -11.3

           Optical            High Alarm  High Warn  Low Warn   Low Alarm

           Receive Power      Threshold   Threshold  Threshold  Threshold

Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)

-------    -----------------  ----------  ---------  ---------  ---------

Te1/1      -13.5                 1.9        -1.0        -9.9      -13.9

i only have 1 transceiver on both switch,i changed the fiber cord also the same issue.

[Reza Sharifi]

Hi,

This is usually not a transceiver or cable issue.  This is a cosmetic bug that produces this message in the logs in most 4500 and 2960x series switches. If you have any unused SFP ports shutting them admin down sometimes help and for the fiber ports that are already connected, there isn't much of workaround, but the message does not cause any issue.

HTH

[Jorge Alberto Largaespada Gonzalez]

thanks Reza,

All port are shutdown

4503E_CORE01#sh int des

Interface              Status      Protocol    Description

Te1/1                          up             up       !!! Hacia 4503 Core02 !!!

Te1/2                          admin down     down    

Te1/3                          admin down     down    

Te1/4                          admin down     down    

Te1/5                          admin down     down    

Te1/6                          admin down     down    

Te1/7                          admin down     down    

Te1/8                          admin down     down    

CORE02

4503E_CORE02#sh int des

Interface                  Status Protocol   Description

Te1/1                          up             up       !!! Hacia 4503 Core01 !!!

Te1/2                          admin down     down    

Te1/3                          admin down     down    

Te1/4                          admin down     down    

Te1/5                          admin down     down    

Te1/6                          admin down     down    

Te1/7                          admin down     down    

Te1/8                          admin down     down    

[Reza Sharifi · Accepted solution]

Hi,

Yes, for posts that are up and running, there is no workaround that I know and have not been able to get any good answer from Cisco, but they insist that this is a cosmetic error message.

sometimes replacing the SFP helps, but the error comes back again.

You may want to open a ticket with TAC.  They may have a workaround in the newer versions.

HTH

[Jorge Alberto Largaespada Gonzalez]

Thanks so much Reza, i will to update the both switches after i comment

[fletcher1001 · Accepted solution]

Hi

I had this problem too

%SFF8472-5-THRESHOLD_VIOLATION: Gi1/0/50: Rx power low warning; Operating value: -17.7 dBm, Threshold value: -17.0 dBm.

We tried everything on this forum and then last night, a field engineer noticed that we were using single mode fibre cable and a multimode sfps. we chnaged the cable to multimode and (touch wood) since then the error has not occured since. It is also worth noticing we never saw any interface errors on the interface and that other forums suggest you can run sm fibre on mm sfp. This fibre had been in place for over a year and only recently started playing up. So in first instance I would recommend you have the correct fibre for the sfp and correct sm./mm patch panel.

[Jorge Alberto Largaespada Gonzalez]

The problem was solved with the correct cable.

[RegineMaeRodriguez6447]

Hi! 

May I ask for the BugID of the error, since it was a cosmetic issue? 

Thank you! 

[Cristian Matei]

Hi,

   Few cosmetic bugs are actually filled as bugs, as these are considered low priority and rarely singled to TAC actually. There are way more important bugs to take care of, than cosmetic bugs.

Regards,

Cristian Matei.