Symptoms:
vmkernel.log or vmkwarning.log:YYYY-MM-DDTHH:MM:SS.SSSZ Wa(180) vmkwarning: cpu0:#######)WARNING: DOM: DOMOwnerSubscribeExtNetInterfaceHealth:3865: Throttled: Either FSS not enabled or unsupported version for external net interface: 0
VMware vSAN 8.0
This is an expected log entry and does not indicate any issue. You can safely ignore it.