> Turns out I didn’t plug the sfp+ all the way in.

I don't know why I know this but back in 2011 something not being plugged in all the way was the root reason why neutrinos were detected traveling faster than the speed of light.

"In March 2012 an LNGS seminar was held, confirming the fiber cable was not fully screwed in during data gathering"

https://en.wikipedia.org/wiki/2011_OPERA_faster-than-light_n...