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No need for an answer anymore, we figured out the solution.For whoever has the same problem:On Nexus:interface Ethernet1/xx fec fc-fecOn Catalystinterface TwentyFiveGigE1/0/xx speed nonegotiate fec cl74And after these commands, the interfaces came...
I have the same problem: Connecting Nexus 93180YC-FX to C9500-48Y4C using SFP-H25G-CU5M cables.The links do not go UP.Did you managed to find a solution?
