Default: False         Value: True or false

    Specifies whether MOP attempts to service load requests from
    remote systems which do not have a corresponding client entity.
    Some network servers are designed to request specific software
    by name, and in such a case there is no need for a client entity
    to exist. By default, MOP tries to process requests for named
    software from unknown clients. Set this attribute to true if you
    wish MOP to ignore such requests.

    set [node node-id] mop circuit circuit-name -
        known clients only boolean

    Example:

    set mop circuit fddi-1 known clients only true