02-18-2013 08:44 PM
Hi,
The following messages are logged in the irregular on Catalyst 4500E Supervisor Engine 7-E.
Are these fiber links required the attenuators?
%SFF8472-5-THRESHOLD_VIOLATION: Te2/6: Rx power high warning; Operating value: 0.5 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te3/6: Rx power high warning; Operating value: 0.9 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te2/6: Rx power high warning; Operating value: 0.6 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te3/6: Rx power high warning; Operating value: 0.9 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te2/6: Rx power high warning; Operating value: 0.6 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te3/6: Rx power high warning; Operating value: 0.9 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te2/6: Rx power high warning; Operating value: 0.6 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te3/6: Rx power high warning; Operating value: 0.8 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te2/6: Rx power high warning; Operating value: 0.5 dBm, Threshold value: 0.4 dBm.
%SFF8472-5-THRESHOLD_VIOLATION: Te3/6: Rx power high warning; Operating value: 0.9 dBm, Threshold value: 0.4 dBm.
Thank you for your cooperation in advance.
-------- Additional Logs Start --------
Cat45E+Sup7E#show interfaces Te2/6 | inc media type
Full-duplex, 10Gb/s, link type is auto, media type is 10GBase-LR
Cat45E+Sup7E#show interfaces Te3/6 | inc media type
Full-duplex, 10Gb/s, link type is auto, media type is 10GBase-LR
Cat45E+Sup7E#show interfaces transceiver module 2
Load for five secs: 5%/1%; one minute: 6%; five minutes: 6%
Time source is NTP, 13:29:28.720 JST Tue Feb 19 2013
If device is externally calibrated, only calibrated values are printed.
++ : high alarm, + : high warning, - : low warning, -- : low alarm.
NA or N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
Optical Optical
Temperature Voltage Tx Power Rx Power
Port (Celsius) (Volts) (dBm) (dBm)
--------- ----------- ------- -------- --------
Te2/1 35.6 3.26 -1.6 -0.2
Te2/2 37.0 3.26 -1.7 -0.3
Te2/3 35.1 3.27 -2.6 -2.2
Te2/4 36.7 3.28 -2.5 -2.5
Te2/5 35.6 3.25 -1.3 -0.9
Te2/6 35.0 3.26 -1.7 0.6
Te2/7 36.1 3.28 -2.4 -2.8
Te2/8 35.1 3.28 -2.4 -3.0
Te2/9 33.1 3.23 -2.4 -2.4
Te2/10 32.2 3.32 -2.1 -3.0
Te2/11 35.0 3.25 -2.5 -2.9
Cat45E+Sup7E#show interfaces transceiver module 3
Load for five secs: 6%/2%; one minute: 6%; five minutes: 6%
Time source is NTP, 13:29:44.348 JST Tue Feb 19 2013
If device is externally calibrated, only calibrated values are printed.
++ : high alarm, + : high warning, - : low warning, -- : low alarm.
NA or N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
Optical Optical
Temperature Voltage Tx Power Rx Power
Port (Celsius) (Volts) (dBm) (dBm)
--------- ----------- ------- -------- --------
Te3/1 36.2 3.26 -2.1 0.2
Te3/2 35.6 3.26 -1.7 -0.6
Te3/3 36.8 3.26 -2.4 -3.4
Te3/4 36.8 3.28 -2.5 -2.6
Te3/5 35.2 3.26 -1.3 0.0
Te3/6 36.2 3.26 -1.1 0.9
Te3/7 34.2 3.28 -2.4 -2.8
Te3/8 34.0 3.29 -2.0 -3.1
Te3/9 35.4 3.28 -2.5 -2.3
Te3/10 32.5 3.24 -2.4 -4.2
Te3/11 34.2 3.28 -2.4 -3.2
Cat45E+Sup7E#show interfaces transceiver threshold-table
Load for five secs: 7%/3%; one minute: 6%; five minutes: 6%
Time source is NTP, 13:29:52.304 JST Tue Feb 19 2013
Optical Tx Optical Rx Temp Laser Bias Voltage
current
------------- ------------- ------ ------------ ---------
10GE LR SFP+
Min1 -12.20 -18.40 -5 N/A 3.00
Min2 -8.20 -14.40 0 N/A 3.10
Max2 0.50 0.50 70 N/A 3.50
Max1 3.50 3.50 75 N/A 3.60
-------- Additional Logs End --------
02-19-2013 05:46 PM
The 10GBASE-LX interface shouldn't require an attenuator; as the optical transmit level (max - 0.5dBm) does not exceed the maximum receiver input specification (0.5dBm. It is possible these two SFPs is not tuned correctly.
Your posted output shows the 2/6 to 3/6 links with a higher receive power level than the transmit level (optical amplification - NOT). Can you try swapping out these SFPs and see if the errors continue? Otherwise you can add 5 to 10dB of attenuation to remove the alarm.
10-21-2014 06:58 AM
Hi Tom,
Can you please tell how to change the value of the threshold?
Thanks in Advance.
10-21-2014 07:05 AM
The power thresholds are not configurable as they are hard-coded into the firmware associated with the SFPs.
If you are seeing high power violations you should add inline attenuation.
10-24-2014 12:18 AM
Thank you Marvin
01-29-2015 04:13 AM
Hello Marivin.
I am configured new WS-C4500X-32 switches for distribution layer and server aggreation WS-C3650-48TQ-E with these model.
I am geetting below error message. I read your document but i ham getting here low alaram, i have observed because of this i am loosing connectiy with my neibhor device and ehter channel is flapping.
Kindly help me to fix this....
*Jan 28 23:54:04.417: %SFF8472-5-THRESHOLD_VIOLATION: Te1/29: Rx power low alarm; Operating value: -16.4 dBm, Threshold value: -13.9 dBm.
*Jan 28 23:54:07.317: %SFF8472-5-THRESHOLD_VIOLATION: Te1/31: Rx power low warning; Operating value: -10.5 dBm, Threshold value: -9.9 dBm.
*Jan 28 23:54:07.417: %SFF8472-5-THRESHOLD_VIOLATION: Te1/32: Rx power low warning; Operating value: -11.4 dBm, Threshold value: -9.9 dBm.
01-29-2015 06:11 AM
That is most likely due to:
1. Loose patch cable
2. Dirty connection at patch point
3. Bad or damaged fiber in the path.
After verifying the transmit end power level ("show interface <number> transceiver detail"), reseat and clean each patch cable along the path. Then check the receive end power levels once again. If it's still bad, try moving to a different fiber pair if one is available. If not, then have your cabling vendor measure and correct the optical attenuation by either reterminating or replacing the strands.
02-11-2015 11:41 PM
Hello Marvin
Thanks for guidence.
I found vendor supplied cable was 62.5/125 diametter & its for Single mode. My SFP's are multimode
after replacing the cables from 50/125 diametter it's started to working without any error.
Thanks!
Ashiwn.
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