Reminds me of an issue we had at a hospital between Nexus (well, ACI) and a Dell ToR for VxRail and someone forgot to tag something on a trunk and it caused a broadcast storm - lovely.I recently had the same problem in work between a nexus tor switch and vxrail switch, new 25gb sfp's as well. I was prepping to rma the lot but found they worked without issue on a ios xe switch so did a little troubleshooting