Hi,
I have installed a new 2960 plus with a original cisco sfp module connected to a 2960S, also with a new cisco sfp, as a trunk.
Curently they are connected with a 2 mtr. fiber cable.
The 2960S keeps logging this information:
Rx power low warning; Operating value: -20.7 dBm, Threshold value: -20.0 dBm
Should I be concerned?
WS-C2960S-48TS-L 15.0(2)SE4 C2960S-UNIVERSALK9-M
sw50-1#sh int gig1/0/52 transceiver
ITU Channel not available (Wavelength not available),
Transceiver is externally calibrated.
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)
--------- ----------- ------- -------- --------
Gi1/0/52 40.8 3.28 -5.9 -20.6 -
WS-C2960+48TC-L 15.0(2)SE6 C2960-LANBASEK9-M
sw50-2#sh interfaces gig0/2 transceiver
ITU Channel not available (Wavelength not available),
Transceiver is externally calibrated.
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)
--------- ----------- ------- -------- --------
Gi0/2 41.6 3.30 -6.3 -16.8
regards
Robert
