Cannot add more than 2 VMXNET3 Adapters in vSphere
When adding a 3rd or more VMXNET3 interface in vSphere 6.7(vm version 14) and 6.7u2 (other versions not tested) the adapter installs then detaches immediately. After reboot only first two nics are still available, no entries in DMESG pertaining to VMX2, or in pciconf.
From DMESG when adding a 3rd NIC:
vmx2: <VMware VMXNET3 Ethernet Adapter> at device 0.0 on pci6
vmx2: Ethernet address: 00:50:56:9e:82:ac