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STP Issue

often we are receiving the STP change logs from the L2 switch and we could see flap in uplinks. We are getting log below.

 

    %SFF8472-3-THRESHOLD_VIOLATION: Gi1/1/1: Rx power low warning; Operating value: -18.2 dBm, Threshold value: -16.9 dBm.

 

    %SFF8472-3-THRESHOLD_VIOLATION: Gi3/1/1: Rx power low warning; Operating value: -17.3 dBm, Threshold value: -16.9 dBm.

1 Accepted Solution

Accepted Solutions

ICANG
Level 1
Level 1

Hi,

 

First of all can you please check what kind of fibre cable and sfp module do you use ? Something like single mode or multimode.? If wrong can you please fix and check again?

 

Apart from that error message could be due to one of the following;

Bad fiber or  Bad transceiver module

As an another action plan;

1-) You can replace the fiber link all over the path .

2-) You can try to replace the transceiver module on both side . 

 

Thank you

Best Regards

PS: Please don't forget to rate if it's helpful

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4 Replies 4

marce1000
VIP
VIP

 

 - Probably software bug, ignore if no effective connectivity problems are seen

 M.



-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
    When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

ICANG
Level 1
Level 1

Hi,

 

First of all can you please check what kind of fibre cable and sfp module do you use ? Something like single mode or multimode.? If wrong can you please fix and check again?

 

Apart from that error message could be due to one of the following;

Bad fiber or  Bad transceiver module

As an another action plan;

1-) You can replace the fiber link all over the path .

2-) You can try to replace the transceiver module on both side . 

 

Thank you

Best Regards

PS: Please don't forget to rate if it's helpful

Hi ,

 

   Awaiting for the customer reply.

 

 

balaji.bandi
Hall of Fame
Hall of Fame

If this was working for long you see suddenly? 

 

in that switch only 2 ports having issue rest all ok.

 

i would inspect physical patch cable and replace SFP and test again and monitor

 

 

 

BB

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