Hi all, I’ve tried searching and searching but can’t find an answer to this question, so no doubt it’s a stupid one, but here goes.
Is it possible from looking at the received light levels in Cisco/Juniper command line to determine if an SFP has a fibre patch lead connected that’s dead, i.e nothing connected on the other end or if the SFP has no fibre patch lead at all? So my thinking is if a patch lead is connected to the SFP and nothing on the other end is transmitting possibly because Rx/Tx are incorrectly swapped the level would be at the noise floor i.e -40dBm as in theory there should be zero light. However if the SFP is enabled but no fibre patch lead is connected can it pick up overhead ambient light from within the data centre, would the fluorescent/LED strip lights in the DC contain any wavelengths to cause the SFP to see -38dBm for example?
So essentially I’m trying to determine from a remote location if someone has connected a fibre patch lead incorrectly, Rx/Tx swap or if there is no patch lead connected at all?
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