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I have had 2 10 Gig Fiber Modules that had been working fine. The Switch got reset or lost its programming and they stopped working. Has anyone ever had this happened.
It looks like the port speed doesn't negotiate, have you tried changing the port link speed on the switch manually?
@Virgo Yes I tried setting it manually and it shows me activity lights on this switch but no activity on the other switch which I found strange. Normally I would expect both switches to show down link if it can't be negotiated.
Did you turn off the port LED light on another switch? You can set it on some switches' web interface, check it.
As you said, if one side's speed doesn't negotiate, another side doesn't either.
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