THRESHOLD_VIOLATION error in Switch.

[sinjish.k]

Hi All, 

  We are getting the below attached error in our switches . Our current switch model is  C9300 - 24S and connected to C9200 series. 

Earlier it was  3750 and it is connected with another 2960 Switch.  At that time we were not getting the below alarm in console ( In show logging ) 

This interface - Gi1/0/1 is configured as an access port.

Error Message: 

Oct 17 09:51:42.854 UAE: %SFF8472-3-THRESHOLD_VIOLATION: Gi1/0/1: Rx power low warning; Operating value: -19.3 dBm, Threshold value: -19.0 dBm.

Oct 17 10:01:43.578 UAE: %SFF8472-3-THRESHOLD_VIOLATION: Gi1/0/1: Rx power low warning; Operating value: -19.3 dBm, Threshold value: -19.0 dBm.

Oct 17 10:02:18.507 UAE: %SEC-6-IPACCESSLOGS: list 10 denied 172.16.64.92 6 packets

Oct 17 10:11:44.302 UAE: %SFF8472-3-THRESHOLD_VIOLATION: Gi1/0/1: Rx power low warning; Operating value: -19.6 dBm, Threshold value: -19.0 dBm.

Oct 17 10:21:45.059 UAE: %SFF8472-3-THRESHOLD_VIOLATION: Gi1/0/1: Rx power low warning; Operating value: -19.3 dBm, Threshold value: -19.0 dBm.

Oct 17 10:31:45.812 UAE: %SFF8472-3-THRESHOLD_VIOLATION: Gi1/0/1: Rx power low warning; Operating value: -19.3 dBm, Threshold value: -19.0 dBm.

Please help to know is there any specific additional commands requred for the SFP ports in 9300 series ? 

Regards,

SK

[Leo Laohoo]

Post the complete output to the following commands: 

sh interface Gi1/0/1 trans det

[sinjish.k]

Please find the output: 

sh interfaces gigabitEthernet 1/0/4 transceiver detail
ITU Channel not available (Wavelength not available),
Transceiver is internally calibrated.
mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
++ : high alarm, + : high warning, - : low warning, -- : low alarm.
A2D readouts (if they differ), are reported in parentheses.
The threshold values are calibrated.

High Alarm High Warn Low Warn Low Alarm
Temperature Threshold Threshold Threshold Threshold
Port (Celsius) (Celsius) (Celsius) (Celsius) (Celsius)
--------- ----------------- ---------- --------- --------- ---------
Gi1/0/4 35.7 89.0 85.0 -5.0 -9.0

High Alarm High Warn Low Warn Low Alarm
Voltage Threshold Threshold Threshold Threshold
Port (Volts) (Volts) (Volts) (Volts) (Volts)
--------- ----------------- ---------- --------- --------- ---------
Gi1/0/4 3.32 3.60 3.50 3.10 3.00

High Alarm High Warn Low Warn Low Alarm
Current Threshold Threshold Threshold Threshold
Port Lane (milliamperes) (mA) (mA) (mA) (mA)
--------- ---- --------------- ---------- --------- --------- ---------
Gi1/0/4 N/A 23.3 69.9 64.9 5.5 4.5

Optical High Alarm High Warn Low Warn Low Alarm
Transmit Power Threshold Threshold Threshold Threshold
Port Lane (dBm) (dBm) (dBm) (dBm) (dBm)
--------- ---- --------------- ---------- --------- --------- ---------
Gi1/0/4 N/A -6.3 1.0 -3.0 -9.5 -13.5

Optical High Alarm High Warn Low Warn Low Alarm
Receive Power Threshold Threshold Threshold Threshold
Port Lane (dBm) (dBm) (dBm) (dBm) (dBm)
--------- ---- --------------- ---------- --------- --------- ---------
Gi1/0/4 N/A -27.4 1.0 -3.0 -19.0 -23.0

[Leo Laohoo]

The remote end's optic is burnt.  

[Cristian Matei]

Hi,

    Log messages are for port Gi1/0/1, while the provided output "sh interfaces gigabitEthernet 1/0/4 transceiver detail" is for port Gi1/0/4; I guess you're seeing similar log messages also for port Gi1/0/4?

    Have you tried reseating the SFP on both sides and the fiber as well? If logs still pop-up, you might hit a bug, try looking for an IOS upgrade to a recommended maintenance release.

Best,

Cristian.

[Cristian Matei]

Hi,

  Additionally, not related to your problem, you could enable DOM on all your CAT9K switches, for better optics monitoring:

transceiver type all
 monitoring

   After performing IOS upgrade, use this document to further perform investigations: https://www.cisco.com/c/en/us/support/docs/switches/catalyst-9500-series-switches/218397-troubleshoot-port-flaps-on-catalyst-9000.html

Best,

Cristian. 

[sinjish.k]

[shambhu.kumar]

Threshold of receive power is -19.0 dBm and Operating value: -19.3 dBm. There is very less difference and does not impact normal operation.

Please clean the SPF and connector of patch cord and check the result.

Regards

[marce1000]

 - Sometimes these errors are related to bugs  and not actually true, and then normal operation can be continued without further actions , 

 M.