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We are replacing 3850 switches with the C9300. We moved the 1Gig sfp from the 3850 into the C9300 and the switch sees the sfp but when the cable is connected the interface doesn't come up, no lights lit, interface not connected.The C9300 has the 8 x ...
The 3850 is set to Auto and the PC is set to Auto but playing around with the interface config on the C9300 #speed nonegotiate has brought the interface up.Found the below which covers my issue but makes no sense as the PC is set to Auto and was work...
