CentOS on VMware: vmxnet3 Failed to activate dev: error 1

I’ve been experimenting with vSphere 6 and vRealize Automation in my lab environment and hit an interesting problem when deploying CentOS 6 & 7 VMs. I had created a network in NSX for the tenant, which created 2 distributed port groups on my distributed switch: vxw-dsv-XX-virtualwire-1-sid-XXXX-name and vxw-vmknicPg-dvs-XX. For some reason I could only see.