Hi Antoine,
Has anybody evaluated this solution or is running in production ? Any feedback would be welcome.
We have a FortiVM in production use for several years now and we are happy with it. Performance is good, it's stable, no major problems. There might be differences in performance concerning the ASICs as mentioned by Ralf, but for our use performance was always more than enough.
One caveat: Don't use the vmxnet2 or vmxnet3 drivers for the NICs. Use the e1000. FortiNet provides images with vmxnet* drivers, but this configuration is not supported by VMware for vsphere. It has been working until vsphere 5.5. With vsphere 5.5 the FortiVM freezes at every snapshot taken. We then changed the NIC type to e1000, no problems since then.
Please note that the FortiVM is just a replacement for a FortiGate. It does not use SDDC as the FortiGate-VMX.
Daniel