Device is an optional argument which can be used if the target
    system requires device information for the boot operation.
    Address information is required for the boot mop circuit command;
    it must be obtainable either from the command line or from the
    MOP Client database.

    boot  [node node-id] mop circuit circuit-name -
          address lan-address, device device-string

    Or, to override any default Device Types information for this
    Client in the MOP Client database:

    boot  [node node-id] mop circuit circuit-name -
          client client-name, device device-string

    Examples:

    boot mop circuit fddi-1 address 08-00-2b-00-33-44, device "sva"

    boot mop circuit csmacd-1 client lamchp, device "sva"