We have this error in a couple 4948E switch (running on 12.2) logs, and wondering what the problem and solution might be. The fiber link has no problems with traffic etc. From reading what little articles are available, some people fixed with replacing SFP and cable, but this made no difference. Attenuators we tried dont attenuate the Tx signal, only the Rx side. The Rx side shows a fine signal level of -10.5 and -5.3 dBm on two switches.
These warnings are from Fiber Store generic SFP+ modules model: SFP-10G-BX (20km BiDi 1270/1330nm)
and SFP-10G-BX (10km BiDi 1270/1330nm). As said the link has no problems with traffic, and were wondering if this is a worrisome or minor bug and what a solution might be. Thanks
Warning from Log:
%SFF8472-5-THRESHOLD_VIOLATION: Te1/50: Tx power high warning; Operating value: 3.2 dBm, Threshold value: 0.4 dBm.
4948E-SWC#sh int te1/50 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)
--------- ------------------ ---------- --------- --------- ---------
Te1/50 20.9 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)
--------- --------------- ---------- --------- --------- ---------
Te1/50 3.25 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)
--------- ----------------- ---------- --------- --------- ---------
Te1/50 3.2 3.4 0.4 -8.2 -12.2
Optical High Alarm High Warn Low Warn Low Alarm
Receive Power Threshold Threshold Threshold Threshold
Port (dBm) (dBm) (dBm) (dBm) (dBm)
------- ----------------- ---------- --------- --------- ---------
Te1/50 -10.5 3.4 0.4 -14.4 -18.4
and from another switch at another site:
SFF8472-5-THRESHOLD_VIOLATION: Te1/50: Tx power high warning; Operating value: 1.9 dBm, Threshold value: 0.4 dBm.
#sh int te1/50 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)
--------- ------------------ ---------- --------- --------- ---------
Te1/50 29.4 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)
--------- --------------- ---------- --------- --------- ---------
Te1/50 3.23 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)
--------- ----------------- ---------- --------- --------- ---------
Te1/50 1.9 3.4 0.4 -8.2 -12.2
Optical High Alarm High Warn Low Warn Low Alarm
Receive Power Threshold Threshold Threshold Threshold
Port (dBm) (dBm) (dBm) (dBm) (dBm)
------- ----------------- ---------- --------- --------- ---------
Te1/50 -5.3 3.4 0.4 -14.4 -18.4
