Please help!

[cmishra]

Cisco 9300 switch
SW version- 16.12.4
%SFF8472-3-THRESHOLD_VIOLATION: Te2/1/5: Rx power low warning; Operating value: -9.9 dBm, Threshold value: -9.9 dBm.

[Leo Laohoo]

Post the complete output to the following command: 

sh interface Te2/1/5
sh interface Te2/1/5 transceiver detail

[cmishra]

[Leo Laohoo]

Clean the optics and clean the patch cable.

[liviu.gheorghe]

I've seen many messages of this type when the SFP is non Cisco.

[cmishra]

Hi Liviu,
All SFPs are Cisco and it's alert are showing last few days.

Without any type of network activity in the  whole network.

[balaji.bandi]

Is this Interface up and working ?

check the Physical cables and also how is the environment temperature ?

Try replacing the SFP with another SFP and test it

Still issue try upgrade to latest code 17.6.X onwards and check.

[liviu.gheorghe]

Hello @cmishra ,

the Optical Receive Power of interface Te2/1/5 is -9.8 dBm and the warning threshold of the interface is set at -9.9 dBm. It's not the end of the world as the interface counters are clean.

Do you have a similar interface with the same SFP and a similar FO cable run? Can you look at and share the show interface Te... transceiver detail of that interface for comparison?