To override any default Device Type information for this Client in
    the MOP Client database, whenever device information is required by
    the target system for the boot operation:

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

    Device is an optional argument, but Address and Circuit information
    is required, either from the command line or from the MOP Client
    database.

    Example:

    boot mop client lamchp device "sva"