Yeah, I know we already figured that out. it took a bit longer to find than I thought it should, so thought I’d share it here to save you some time. I was not able to find any commands for it that were obvious in the CLI, so I start the Googling for the documentation. The port on the 40Gb side just says the bandwidth was 40000000 and it wasn’t breaking out the channels. I patched everything in and the transceivers looked fine, but when I turned up one of the 10Gb ports connected to the 40Gb ports it just started flapping.
I needed to connect them to the old core switches using a QSFP to SFP+ breakout cable because the old switch didn’t have any 40Gb ports. This cable turns a 40Gbps port into four 10Gbps portsĪs part of a core refresh, I had a pair of shiny new Nexus 93108TC-EX switches.