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Cisco: Low Optical Transmit Power

octuslimb
Level 1
Level 1

Does this point to an issue with an SFP?

 

We have a 4500-x vss stack, through which runs the heartbeat for a bunch of vrrp groups upstream, both routers have been going active due to loss of heartbeat.

 

One of the switch uplinks has a tx power of -10db on the switch, but router upstream is showing healthy rx signal of -5db.

2 Replies 2

mgrabovs
Cisco Employee
Cisco Employee

Hello,

 

To check if the values are under the proper intervals, we would have to check under these commands:

show hw-module subslot X/X transceiver X status
show hw-module subslot X/X transceiver X idprom detail

Keep in mind that you should identify the link and substitute the X's with the proper values.

 

Thanks.

Marin Grabovschi

Alex Pfeil
Level 7
Level 7

We had an issue the other day where we were within the length that the SFP should perform at and the fiber optic cable was passing the test. We used a more powerful SFP and it corrected the issue.