I have tried plugging a QSFP28 loopback device into port on a cisco switch. I can see that the chip is recognized when I do ‘show interface status’ as I can see the model listed but it is ‘not connected’. Status light is going from orange when unplugged to off with no light when plugged in.

Interface is apparently not shutdown and should be active. I entered ‘no shutdown’ and still nothing.

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