This value configures which FCoE operating mode the HH3C switch runs in: non-FCoE, FCF, NPV, or Transit, with the rule that the switch can only be converted directly between non-FCoE mode and one of the FCoE modes, never directly between two different FCoE modes. A storage network administrator provisions this when setting up converged Ethernet/Fibre-Channel storage traffic, keeping in mind that converting between the three FCoE modes requires passing back through non-FCoE mode as an intermediate step, which also clears the prior mode's configuration. For example, moving a switch from NPV mode to Transit mode requires first setting this to non-FCoE(1), then to transit(4), rather than a direct switch.