This enumerated value reports the transport type carrying this VSAN's endpoint on an FCoE member port's traffic — the underlying physical/logical medium (e.g. Ethernet-based FCoE) it rides over. Since UCS lets the same logical SAN connectivity run over either native Fibre Channel or FCoE-over-Ethernet uplinks, this field tells an admin which physical infrastructure this VSAN's endpoint on an FCoE member port actually depends on when planning maintenance windows or diagnosing a shared-infrastructure outage. For an FCoE object like this the value is typically 'ether', confirming the traffic is FCoE-encapsulated Fibre Channel riding over Ethernet.