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I have a WS-12-250-DC running 1.4.6 whose logfile constantly fills up with this:

Jan 16 08:43:15 SFP: FAULT on SFP 1, resetting...
Jan 16 08:43:17 SFP: FAULT on SFP 1, resetting...
Jan 16 08:43:24 SFP: FAULT on SFP 1, resetting...
Jan 16 08:43:25 SFP: FAULT on SFP 1, resetting...
Jan 16 08:43:26 SFP: FAULT on SFP 1, resetting...
Jan 16 08:43:34 SFP: FAULT on SFP 1, resetting...

However there is no SFP in that switch and never has been.

Is there any way of suppressing this log entry?

I would be more concerned why you are getting this message, the unit may be damaged if there is no SFP module in that port or possibly some insects have made a nest in that slot and are causing issues????

sirhc wrote:I would be more concerned why you are getting this message, the unit may be damaged if there is no SFP module in that port or possibly some insects have made a nest in that slot and are causing issues????

I was assuming it was something software/firmware related as the message seems to indicate it already thought it had a functional SFP in the slot somehow.

I can take a look at the slot the next time i'm near that switch though. (The switch is fully functional otherwise).

Well yea the message is being generated by the software but the software seems to think there is an SFP inserted into the slot, the question is why?

Possible causes:
1) There really is a module in the slot and it was forgotten about.
2) The board is damaged or failed in some way or another.
3) Critters have made a nest in the SFP slot and somehow made an electrical connection.

sirhc wrote:Well yea the message is being generated by the software but the software seems to think there is an SFP inserted into the slot, the question is why?

Possible causes:
1) There really is a module in the slot and it was forgotten about.
2) The board is damaged or failed in some way or another.
3) Critters have made a nest in the SFP slot and somehow made an electrical connection.

I think I can rule out #1 & #3:



So maybe it has failed in some way, odd as the device is fully functional otherwise - maybe I should throw in a couple of SFPs into those ports and see if those ports do work.

(not I have tried disabling the ports fully in the configuration but its still logging these errors).

Things to try:

Power cycle
Insert a module - BUT if it is "damage" has occurred and not a faulty part UNKNOWN things could happen!!!
RMA

Interesting installing an SFP in the port seems to have shut it up:

Jan 23 13:22:05 SFP: FAULT on SFP 1, resetting...
Jan 23 13:22:06 SFP: FAULT on SFP 1, resetting...
Jan 23 13:22:10 SFP: I2C communications up to SFP 1

Does the SFP work?

What happens if you remove SFP?

Did you try a power cycle?

Just a quick followup.

The SFPs work afaik, but I can't check if they pas traffic as there is nothing else in the area other than the switch itself to plug it into and I wasn't to avoid creating a loop.

I haven't fully power cycled the switch, I'm unlikely to do that for a few months while its all working ok.