I have a 3750G switch port cabled to a 2955C switch with multimode fiber. At the moment I have a SFP of type GLC-SX-MM in the SFP port on the 3750G.
The fiber port on the 2955C is labelled 100FX MM.
When I have the 2 connected over the fiber, I get no link LED on either end.
I suspect that the GLC-SX-MM (being Gigabit only) and the 100FX port are not able to communicate due to the speed difference. Is that correct? Do I need to replace the GLC-SX-MM with a GLC-FE-100FX to get link?
Hello friend, remembers that single modules SFP GLC-SX-MM work on 1000mbps single in multiway and the fiber does not negotiate speeds, the only thing that you can make have a pair of equal modules in the ends or is GLC-FE-100X or GLC-SX-MM thus to be able to communicate them
note:both modules must handle he himself type of signaling MM or SM
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