Cisco 2960S SFF8472-5-THRESHOLD_VIOLATION

[vincentyore]

Hi All

I have a issue connecting my Cisco 3750X 12 port fibre switch to my Cisco 2960S 24Port switch using Multi Mode Fibre.

I have Mode condtioning cables connecting to the SFP (GLC-LH-SMD) on the 3750 via a fibre patch panel which bring me to the 2960s with its Mode conditioning cable and SFP (GLC-LH-SMD).

The fibre port on the Cisco 2960S was up for all of 10 mins and has gone out with the following error message.

%SFF8472-5-THRESHOLD_VIOLATION: Gi1/0/26: Rx power high warning; Operating value:  -2.7 dBm, Threshold value:  -3.0 dBm.

I did a show int transceiver command and got the following output.

DS-THN-SW3#show interfaces transceiver

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)

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

Gi1/0/26     25.2       3.31      -5.1     -28.5

All SFP's are new as is the Multi Mode Fibre cable running from one building to another.

[Janaka Wellege]

Hi All,

One of  member port of port channel was flapping and Here is the error message

Error log:

.Mar 17 08:27:37: %SFF8472-5-THRESHOLD_VIOLATION: Te6/1/1: Tx power low alarm; Operating value: -40.0 dBm, Threshold value: -11.3 dBm.

Cisco TAC analyse the issue under 629566213 but  their initial advices was not much experience oriented.

Finally I have resolved the issue just by entering following command.

switch 6 frulink reload

Janaka Wellege Bsc.Eng

University of Peradeniya.